GitHub/moto-9609/android_kernel_motorola_exynos9610.git
8 years agoNFSv4.1: Handle NFS4ERR_BADSESSION/NFS4ERR_DEADSESSION replies to OP_SEQUENCE
Trond Myklebust [Mon, 5 Dec 2016 00:26:40 +0000 (19:26 -0500)]
NFSv4.1: Handle NFS4ERR_BADSESSION/NFS4ERR_DEADSESSION replies to OP_SEQUENCE

In the case where SEQUENCE receives a NFS4ERR_BADSESSION or
NFS4ERR_DEADSESSION error, we just want to report the session as needing
recovery, and then we want to retry the operation.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agoNFS: Only look at the change attribute cache state in nfs_check_verifier
Trond Myklebust [Sun, 4 Dec 2016 23:34:34 +0000 (18:34 -0500)]
NFS: Only look at the change attribute cache state in nfs_check_verifier

When looking at whether or not our dcache is valid, we really don't care
about the general state of the directory attribute cache. Instead, we
we only care about the state of the change attribute.

This fixes a performance issue when the client is responsible for
changing the directory contents; a number of NFSv4 operations will
atomically update the directory change attribute, but may not return
all the other attributes.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agoNFS: Fix incorrect size revalidation when holding a delegation
Trond Myklebust [Sun, 4 Dec 2016 23:08:40 +0000 (18:08 -0500)]
NFS: Fix incorrect size revalidation when holding a delegation

We should only care about checking the attributes if the page cache
is marked as dubious (using NFS_INO_REVAL_PAGECACHE) and the
NFS_INO_REVAL_FORCED flag is set.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agoNFS: Fix incorrect mapping revalidation when holding a delegation
Trond Myklebust [Sun, 4 Dec 2016 21:02:43 +0000 (16:02 -0500)]
NFS: Fix incorrect mapping revalidation when holding a delegation

We should only care about checking the attributes if the page cache
is marked as dubious (using NFS_INO_REVAL_PAGECACHE) and the
NFS_INO_REVAL_FORCED flag is set.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agopNFS/flexfiles: Support sending layoutstats in layoutreturn
Trond Myklebust [Wed, 19 Oct 2016 19:59:28 +0000 (15:59 -0400)]
pNFS/flexfiles: Support sending layoutstats in layoutreturn

Add the ability to send an array of layoutstats entries as part of
layoutreturn.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agopNFS/flexfiles: Minor refactoring before adding iostats to layoutreturn
Trond Myklebust [Thu, 6 Oct 2016 21:53:20 +0000 (17:53 -0400)]
pNFS/flexfiles: Minor refactoring before adding iostats to layoutreturn

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agoNFS: Fix up read of mirror stats
Trond Myklebust [Mon, 3 Oct 2016 22:13:20 +0000 (18:13 -0400)]
NFS: Fix up read of mirror stats

Need to lock while reading in order to ensure 64-bit reads are correct.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agopNFS/flexfiles: Clean up layoutstats
Trond Myklebust [Thu, 29 Sep 2016 16:15:27 +0000 (09:15 -0700)]
pNFS/flexfiles: Clean up layoutstats

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agopNFS/flexfiles: Refactor encoding of the layoutreturn payload
Trond Myklebust [Fri, 2 Dec 2016 21:15:05 +0000 (16:15 -0500)]
pNFS/flexfiles: Refactor encoding of the layoutreturn payload

Add the layout error payload to the flexfiles layoutreturn private
data, and set up the encoding mechanisms. This is a refactoring in
preparation for adding the layout iostats payload.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agopNFS: Add a layoutreturn callback to performa layout-private setup
Trond Myklebust [Fri, 2 Dec 2016 21:12:12 +0000 (16:12 -0500)]
pNFS: Add a layoutreturn callback to performa layout-private setup

Add a callback to allow the flexfiles layout driver to initialise the
layout private payload.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agopNFS: Allow layout drivers to manage private data in struct nfs4_layoutreturn
Trond Myklebust [Fri, 23 Sep 2016 15:38:08 +0000 (11:38 -0400)]
pNFS: Allow layout drivers to manage private data in struct nfs4_layoutreturn

Cleanup to allow layout drivers to attach private data to layoutreturn,
and manage the data.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agoNFSv4: Add a generic structure for managing layout-private information
Trond Myklebust [Thu, 20 Oct 2016 14:12:45 +0000 (10:12 -0400)]
NFSv4: Add a generic structure for managing layout-private information

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agopNFS/flexfiles: Only send layoutstats updates for mirrors that were updated
Trond Myklebust [Fri, 25 Nov 2016 18:17:15 +0000 (13:17 -0500)]
pNFS/flexfiles: Only send layoutstats updates for mirrors that were updated

If there have been no reads or writes to a given mirror since the last
layoutstats update, then don't resend the same data.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agopNFS/flexfiles: Don't attempt to send layoutstats if there are no entries
Trond Myklebust [Fri, 25 Nov 2016 18:24:09 +0000 (13:24 -0500)]
pNFS/flexfiles: Don't attempt to send layoutstats if there are no entries

If the list of mirrors is empty, then don't send an RPC call.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agoNFS: Allow getattr to also report readdirplus cache hits
Trond Myklebust [Fri, 2 Dec 2016 14:15:37 +0000 (09:15 -0500)]
NFS: Allow getattr to also report readdirplus cache hits

If the use called stat() on an 'ls -l' workload, and the attribute
cache was successfully revalidate by READDIRPLUS, then we want to
report that back so that the readdir code continues to use
readdirplus.

Reviewed-by: Benjamin Coddington <bcodding@redhat.com>
Tested-by: Benjamin Coddington <bcodding@redhat.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agoNFS: Be more targeted about readdirplus use when doing lookup/revalidation
Trond Myklebust [Sat, 19 Nov 2016 16:21:54 +0000 (11:21 -0500)]
NFS: Be more targeted about readdirplus use when doing lookup/revalidation

There is little point in setting NFS_INO_ADVISE_RDPLUS in nfs_lookup and
nfs_lookup_revalidate() unless a process is actually doing readdir on the
parent directory.
Furthermore, there is little point in using readdirplus if we're trying
to revalidate a negative dentry.

Reviewed-by: Benjamin Coddington <bcodding@redhat.com>
Tested-by: Benjamin Coddington <bcodding@redhat.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agoNFS: Fix a performance regression in readdir
Trond Myklebust [Sat, 19 Nov 2016 15:54:55 +0000 (10:54 -0500)]
NFS: Fix a performance regression in readdir

Ben Coddington reports that commit 311324ad1713, by adding the function
nfs_dir_mapping_need_revalidate() that checks page cache validity on
each call to nfs_readdir() causes a performance regression when
the directory is being modified.

If the directory is changing while we're iterating through the directory,
POSIX does not require us to invalidate the page cache unless the user
calls rewinddir(). However, we still do want to ensure that we use
readdirplus in order to avoid a load of stat() calls when the user
is doing an 'ls -l' workload.

The fix should be to invalidate the page cache immediately when we're
setting the NFS_INO_ADVISE_RDPLUS bit.

Reported-by: Benjamin Coddington <bcodding@redhat.com>
Fixes: 311324ad1713 ("NFS: Be more aggressive in using readdirplus...")
Reviewed-by: Benjamin Coddington <bcodding@redhat.com>
Tested-by: Benjamin Coddington <bcodding@redhat.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agoNFS: fix typo in parameter description
Wei Yongjun [Fri, 28 Oct 2016 14:37:02 +0000 (14:37 +0000)]
NFS: fix typo in parameter description

Fix typo in parameter description.

Fixes: 5405fc44c337 ("NFSv4.x: Add kernel parameter to control the
callback server")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agoNFS: discard nfs_lockowner structure.
NeilBrown [Thu, 13 Oct 2016 04:26:47 +0000 (15:26 +1100)]
NFS: discard nfs_lockowner structure.

It now has only one field and is only used in one structure.
So replaced it in that structure by the field it contains.

Signed-off-by: NeilBrown <neilb@suse.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agoNFSv4: enhance nfs4_copy_lock_stateid to use a flock stateid if there is one
NeilBrown [Thu, 13 Oct 2016 04:26:47 +0000 (15:26 +1100)]
NFSv4: enhance nfs4_copy_lock_stateid to use a flock stateid if there is one

A process can have two possible lock owner for a given open file:
a per-process Posix lock owner and a per-open-file flock owner
Use both of these when searching for a suitable stateid to use.

With this patch, READ/WRITE requests will use the correct stateid
if a flock lock is active.

Signed-off-by: NeilBrown <neilb@suse.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agoNFSv4: change nfs4_select_rw_stateid to take a lock_context inplace of lock_owner
NeilBrown [Thu, 13 Oct 2016 04:26:47 +0000 (15:26 +1100)]
NFSv4: change nfs4_select_rw_stateid to take a lock_context inplace of lock_owner

The only time that a lock_context is not immediately available is in
setattr, and now that it has an open_context, it can easily find one
with nfs_get_lock_context.
This removes the need for the on-stack nfs_lockowner.

This change is preparation for correctly support flock stateids.

Signed-off-by: NeilBrown <neilb@suse.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agoNFSv4: change nfs4_do_setattr to take an open_context instead of a nfs4_state.
NeilBrown [Thu, 13 Oct 2016 04:26:47 +0000 (15:26 +1100)]
NFSv4: change nfs4_do_setattr to take an open_context instead of a nfs4_state.

The open_context can always lead directly to the state, and is always easily
available, so this is a straightforward change.
Doing this makes more information available to _nfs4_do_setattr() for use
in the next patch.

Signed-off-by: NeilBrown <neilb@suse.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agoNFSv4: add flock_owner to open context
NeilBrown [Thu, 13 Oct 2016 04:26:47 +0000 (15:26 +1100)]
NFSv4: add flock_owner to open context

An open file description (struct file) in a given process can be
associated with two different lock owners.

It can have a Posix lock owner which will be different in each process
that has a fd on the file.
It can have a Flock owner which will be the same in all processes.

When searching for a lock stateid to use, we need to consider both of these
owners

So add a new "flock_owner" to the "nfs_open_context" (of which there
is one for each open file description).

This flock_owner does not need to be reference-counted as there is a
1-1 relation between 'struct file' and nfs open contexts,
and it will never be part of a list of contexts.  So there is no need
for a 'flock_context' - just the owner is enough.

The io_count included in the (Posix) lock_context provides no
guarantee that all read-aheads that could use the state have
completed, so not supporting it for flock locks in not a serious
problem.  Synchronization between flock and read-ahead can be added
later if needed.

When creating an open_context for a non-openning create call, we don't have
a 'struct file' to pass in, so the lock context gets initialized with
a NULL owner, but this will never be used.

The flock_owner is not used at all in this patch, that will come later.

Acked-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: NeilBrown <neilb@suse.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agoNFS: remove l_pid field from nfs_lockowner
NeilBrown [Thu, 13 Oct 2016 04:26:47 +0000 (15:26 +1100)]
NFS: remove l_pid field from nfs_lockowner

this field is not used in any important way and probably should
have been removed by

Commit: 8003d3c4aaa5 ("nfs4: treat lock owners as opaque values")

which removed the pid argument from nfs4_get_lock_state.

Except in unusual and uninteresting cases, two threads with the same
->tgid will have the same ->files pointer, so keeping them both
for comparison brings no benefit.

Acked-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: NeilBrown <neilb@suse.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agoNFS: Remove unused argument from nfs_direct_write_complete()
Anna Schumaker [Wed, 23 Nov 2016 18:49:38 +0000 (13:49 -0500)]
NFS: Remove unused argument from nfs_direct_write_complete()

This parameter hasn't been used since 2a009ec9 (Linux 3.13-rc3), so
let's remove it from this function.

Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agoNFS: Remove unused authflavour parameter from nfs_get_client()
Anna Schumaker [Thu, 17 Nov 2016 20:15:55 +0000 (15:15 -0500)]
NFS: Remove unused authflavour parameter from nfs_get_client()

This parameter hasn't been used since f8407299 (Linux 3.11-rc2), so
let's remove it from this function and callers.

Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agonfs: fix false positives in nfs40_walk_client_list()
J. Bruce Fields [Mon, 28 Nov 2016 14:02:52 +0000 (09:02 -0500)]
nfs: fix false positives in nfs40_walk_client_list()

It's possible that two different servers can return the same (clientid,
verifier) pair purely by coincidence.  Both are 64-bit values, but
depending on the server implementation, they can be highly predictable
and collisions may be quite likely, especially when there are lots of
servers.

So, check for this case.  If the clientid and verifier both match, then
we actually know they *can't* be the same server, since a new
SETCLIENTID to an already-known server should have changed the verifier.

This helps fix a bug that could cause the client to mount a filesystem
from the wrong server.

Reviewed-by: Jeff Layton <jlayton@redhat.com>
Tested-by: Yongcheng Yang <yoyang@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agosunrpc: Don't engage exponential backoff when connection attempt is rejected.
NeilBrown [Wed, 23 Nov 2016 03:44:58 +0000 (14:44 +1100)]
sunrpc: Don't engage exponential backoff when connection attempt is rejected.

xs_connect() contains an exponential backoff mechanism so the repeated
connection attempts are delayed by longer and longer amounts.

This is appropriate when the connection failed due to a timeout, but
it not appropriate when a definitive "no" answer is received.  In such
cases, call_connect_status() imposes a minimum 3-second back-off, so
not having the exponetial back-off will never result in immediate
retries.

The current situation is a problem when the NFS server tries to
register with rpcbind but rpcbind isn't running.  All connection
attempts are made on the same "xprt" and as the connection is never
"closed", the exponential back delays successive attempts to register,
or de-register, different protocols.  This results in a multi-minute
delay with no benefit.

So, when call_connect_status() receives a definitive "no", use
xprt_conditional_disconnect() to cancel the previous connection attempt.
This will set XPRT_CLOSE_WAIT so that xprt->ops->close() calls xs_close()
which resets the reestablish_timeout.

To ensure xprt_conditional_disconnect() does the right thing, we
ensure that rq_connect_cookie is set before a connection attempt, and
allow xprt_conditional_disconnect() to complete even when the
transport is not fully connected.

Signed-off-by: NeilBrown <neilb@suse.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agopNFS: Skip invalid stateids when doing a bulk destroy
Trond Myklebust [Wed, 30 Nov 2016 23:00:07 +0000 (18:00 -0500)]
pNFS: Skip invalid stateids when doing a bulk destroy

If the layout stateid is already invalid, we have no work to do.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agopNFS: Wait on outstanding layoutreturns to complete in pnfs_roc()
Trond Myklebust [Wed, 30 Nov 2016 21:23:38 +0000 (16:23 -0500)]
pNFS: Wait on outstanding layoutreturns to complete in pnfs_roc()

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agopNFS: Don't mark the layout as freed if the last lseg is marked for return
Trond Myklebust [Wed, 30 Nov 2016 16:38:10 +0000 (11:38 -0500)]
pNFS: Don't mark the layout as freed if the last lseg is marked for return

Address another memory leak.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agopNFS: Sync the layout state bits in pnfs_cache_lseg_for_layoutreturn
Trond Myklebust [Wed, 30 Nov 2016 15:47:48 +0000 (10:47 -0500)]
pNFS: Sync the layout state bits in pnfs_cache_lseg_for_layoutreturn

Ensure that the layout state bits are synced when we cache a layout
segment for layoutreturn using an appropriate call to
pnfs_set_plh_return_info.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agopNFS: Fix bugs in _pnfs_return_layout
Trond Myklebust [Wed, 30 Nov 2016 15:19:09 +0000 (10:19 -0500)]
pNFS: Fix bugs in _pnfs_return_layout

We need to honour the NFS_LAYOUT_RETURN_REQUESTED bit regardless of
whether or not there are layout segments pending.
Furthermore, we should ensure that we leave the plh_return_segs list
empty.

This patch fixes a memory leak of the layout segments on plh_return_segs.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agopNFS: Clear all layout segment state in pnfs_mark_layout_stateid_invalid
Trond Myklebust [Wed, 30 Nov 2016 17:32:55 +0000 (12:32 -0500)]
pNFS: Clear all layout segment state in pnfs_mark_layout_stateid_invalid

When the layout state is invalidated, then so is the layout segment
state, and hence we do need to clean up the state bits.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agopNFS: Prevent unnecessary layoutreturns after delegreturn
Trond Myklebust [Sat, 19 Nov 2016 13:48:47 +0000 (08:48 -0500)]
pNFS: Prevent unnecessary layoutreturns after delegreturn

If we cannot grab the inode or superblock, then we cannot pin the
layout header, and so we cannot send a layoutreturn as part of an
async delegreturn call. In this case, we currently end up sending
an extra layoutreturn after the delegreturn. Since the layout was
implicitly returned by the delegreturn, that just gets a BAD_STATEID.

The fix is to simply complete the return-on-close immediately.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agopNFS: Enable layoutreturn operation for return-on-close
Trond Myklebust [Wed, 16 Nov 2016 06:11:25 +0000 (01:11 -0500)]
pNFS: Enable layoutreturn operation for return-on-close

Amend the pnfs return on close helper functions to enable sending the
layoutreturn op in CLOSE/DELEGRETURN. This closes a potential race between
CLOSE/DELEGRETURN and parallel OPEN calls to the same file, and allows the
client and the server to agree on whether or not there is an outstanding
layout.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agopNFS: Clean up - add a helper to initialise struct layoutreturn_args
Trond Myklebust [Wed, 16 Nov 2016 02:47:27 +0000 (21:47 -0500)]
pNFS: Clean up - add a helper to initialise struct layoutreturn_args

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agoNFSv4: Add encode/decode of the layoutreturn op in DELEGRETURN
Trond Myklebust [Tue, 15 Nov 2016 20:03:33 +0000 (15:03 -0500)]
NFSv4: Add encode/decode of the layoutreturn op in DELEGRETURN

Add XDR encoding for the layoutreturn op, and storage for the layoutreturn
arguments to the DELEGRETURN compound.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agoNFSv4: Add encode/decode of the layoutreturn op in CLOSE
Trond Myklebust [Tue, 15 Nov 2016 19:56:07 +0000 (14:56 -0500)]
NFSv4: Add encode/decode of the layoutreturn op in CLOSE

Add XDR encoding for the layoutreturn op, and storage for the layoutreturn
arguments to the CLOSE compound.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agoNFSv4: Fix missing operation accounting in NFS4_dec_delegreturn_sz
Trond Myklebust [Wed, 16 Nov 2016 18:54:00 +0000 (13:54 -0500)]
NFSv4: Fix missing operation accounting in NFS4_dec_delegreturn_sz

We need to account for the reply to the PUTFH operation in the
DELEGRETURN compound.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agopNFS: Don't mark layout segments invalid on layoutreturn in pnfs_roc
Trond Myklebust [Tue, 15 Nov 2016 23:29:59 +0000 (18:29 -0500)]
pNFS: Don't mark layout segments invalid on layoutreturn in pnfs_roc

The layoutreturn call will take care of invalidating the layout segments
once the call is successful.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agopNFS: Get rid of unnecessary layout parameter in encode_layoutreturn callback
Trond Myklebust [Thu, 15 Sep 2016 22:49:52 +0000 (18:49 -0400)]
pNFS: Get rid of unnecessary layout parameter in encode_layoutreturn callback

The parameter is already present in the "args" structure.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agopNFS: Skip checking for return-on-close if the layout is invalid
Trond Myklebust [Mon, 21 Nov 2016 16:05:33 +0000 (11:05 -0500)]
pNFS: Skip checking for return-on-close if the layout is invalid

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agopNFS: Remove spurious wake up in pnfs_layout_remove_lseg()
Trond Myklebust [Fri, 18 Nov 2016 20:18:52 +0000 (15:18 -0500)]
pNFS: Remove spurious wake up in pnfs_layout_remove_lseg()

There is no change to the value of NFS_LAYOUT_RETURN, so we should
not be waking up the RPC call.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agoNFSv4: Ignore LAYOUTRETURN result if the layout doesn't match or is invalid
Trond Myklebust [Sun, 20 Nov 2016 18:13:54 +0000 (13:13 -0500)]
NFSv4: Ignore LAYOUTRETURN result if the layout doesn't match or is invalid

Fix a potential race with CB_LAYOUTRECALL in which the server recalls the
remaining layout segments while our LAYOUTRETURN is still in transit.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agopNFS: Do not free layout segments that are marked for return
Trond Myklebust [Wed, 12 Oct 2016 23:50:54 +0000 (19:50 -0400)]
pNFS: Do not free layout segments that are marked for return

We may want to process and transmit layout stat information for the
layout segments that are being returned, so we should defer freeing
them until after the layoutreturn has completed.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agopNFS: Delay getting the layout header in CB_LAYOUTRECALL handlers
Trond Myklebust [Mon, 31 Oct 2016 14:05:21 +0000 (10:05 -0400)]
pNFS: Delay getting the layout header in CB_LAYOUTRECALL handlers

Instead of grabbing the layout, we want to get the inode so that we
can reduce races between layoutget and layoutrecall when the server
does not support call referring.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agopNFS: consolidate the different range intersection tests
Trond Myklebust [Tue, 25 Oct 2016 16:24:25 +0000 (12:24 -0400)]
pNFS: consolidate the different range intersection tests

Both pnfs.c and the flexfiles code have their own versions of the
range intersection testing, and the "end_offset" helper.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agopNFS: Fix race in pnfs_wait_on_layoutreturn
Trond Myklebust [Fri, 18 Nov 2016 20:21:30 +0000 (15:21 -0500)]
pNFS: Fix race in pnfs_wait_on_layoutreturn

We must put the task to sleep while holding the inode->i_lock in order
to ensure atomicity with the test for NFS_LAYOUT_RETURN.

Fixes: 500d701f336b ("NFS41: make close wait for layoutreturn")
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agopNFS: On error, do not send LAYOUTGET until the LAYOUTRETURN has completed
Trond Myklebust [Mon, 17 Oct 2016 21:54:32 +0000 (17:54 -0400)]
pNFS: On error, do not send LAYOUTGET until the LAYOUTRETURN has completed

If there is an I/O error, we should not call LAYOUTGET until the
LAYOUTRETURN that reports the error is complete.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Cc: stable@vger.kernel.org # v4.8+
8 years agopNFS: Force a retry of LAYOUTGET if the stateid doesn't match our cache
Trond Myklebust [Wed, 23 Nov 2016 17:36:04 +0000 (12:36 -0500)]
pNFS: Force a retry of LAYOUTGET if the stateid doesn't match our cache

If the server sends us a completely new stateid, and the client thinks
it already holds a layout, then force a retry of the LAYOUTGET after
invalidating the existing layout in order to avoid corruption due to
races.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agopNFS: Clear NFS_LAYOUT_RETURN_REQUESTED when invalidating the layout stateid
Trond Myklebust [Mon, 14 Nov 2016 19:34:18 +0000 (14:34 -0500)]
pNFS: Clear NFS_LAYOUT_RETURN_REQUESTED when invalidating the layout stateid

We must ensure that we don't schedule a layoutreturn if the layout stateid
has been marked as invalid.

Fixes: 2a59a0411671e ("pNFS: Fix pnfs_set_layout_stateid() to clear...")
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Cc: stable@vger.kernel.org # v4.8+
8 years agopNFS: Don't clear the layout stateid if a layout return is outstanding
Trond Myklebust [Mon, 14 Nov 2016 18:10:48 +0000 (13:10 -0500)]
pNFS: Don't clear the layout stateid if a layout return is outstanding

If we no longer hold any layout segments, we're normally expected to
consider the layout stateid to be invalid. However we cannot assume this
if we're about to, or in the process of sending a layoutreturn.

Fixes: 334a8f37115b ("pNFS: Don't forget the layout stateid if...")
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Cc: stable@vger.kernel.org # v4.8+
8 years agopNFS: Fix a deadlock between read resends and layoutreturn
Trond Myklebust [Sun, 27 Nov 2016 20:12:39 +0000 (15:12 -0500)]
pNFS: Fix a deadlock between read resends and layoutreturn

We must not call nfs_pageio_init_read() on a new nfs_pageio_descriptor
while holding a reference to a layout segment, as that can deadlock
pnfs_update_layout().

Fixes: d67ae825a59d6 ("pnfs/flexfiles: Add the FlexFile Layout Driver")
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Cc: stable@vger.kernel.org # v4.0+
8 years agoNFSv4.1: Fix regression in callback retry handling
Fred Isaman [Tue, 27 Sep 2016 19:37:11 +0000 (15:37 -0400)]
NFSv4.1: Fix regression in callback retry handling

When initializing a freshly created slot for the calllback channel,
the seq_nr needs to be 0, not 1.  Otherwise validate_seqid
and nfs4_slot_wait_on_seqid get confused and believe that the
mpty slot corresponds to a previously sent reply.

Signed-off-by: Fred Isaman <fred.isaman@gmail.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agoNFSv4: Optimise away forced revalidation when we know the attributes are OK
Trond Myklebust [Thu, 27 Oct 2016 22:42:04 +0000 (18:42 -0400)]
NFSv4: Optimise away forced revalidation when we know the attributes are OK

The NFS_INO_REVAL_FORCED flag needs to be set if we just got a delegation,
and we see that there might still be some ambiguity as to whether or not
our attribute or data cache are valid.
In practice, this means that a call to nfs_check_inode_attributes() will
have noticed a discrepancy between cached attributes and measured ones,
so let's move the setting of NFS_INO_REVAL_FORCED to there.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agoNFSv4: Don't request close-to-open attribute when holding a delegation
Trond Myklebust [Thu, 27 Oct 2016 22:25:04 +0000 (18:25 -0400)]
NFSv4: Don't request close-to-open attribute when holding a delegation

If holding a delegation, we do not need to ask the server to return
close-to-open cache consistency attributes as part of the CLOSE
compound.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agoNFSv4: Don't request a GETATTR on open_downgrade.
Trond Myklebust [Thu, 27 Oct 2016 22:27:02 +0000 (18:27 -0400)]
NFSv4: Don't request a GETATTR on open_downgrade.

If we're not closing the file completely, there is no need to request
close-to-open attributes.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agoNFSv4: Don't ask for the change attribute when reclaiming state
Trond Myklebust [Thu, 10 Nov 2016 20:47:26 +0000 (15:47 -0500)]
NFSv4: Don't ask for the change attribute when reclaiming state

We don't need to ask for the change attribute when returning a delegation
or recovering from a server reboot, and it could actually cause us to
obtain an incorrect value if we're using a pNFS flavour that requires
LAYOUTCOMMIT.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agoNFSv4: Don't check file access when reclaiming state
Trond Myklebust [Thu, 10 Nov 2016 20:40:34 +0000 (15:40 -0500)]
NFSv4: Don't check file access when reclaiming state

If we're reclaiming state after a reboot, or as part of returning a
delegation, we don't need to check access modes again.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agoLinux 4.9-rc7
Linus Torvalds [Sun, 27 Nov 2016 21:08:04 +0000 (13:08 -0800)]
Linux 4.9-rc7

8 years agoMerge git://git.infradead.org/intel-iommu
Linus Torvalds [Sun, 27 Nov 2016 16:24:46 +0000 (08:24 -0800)]
Merge git://git.infradead.org/intel-iommu

Pull IOMMU fixes from David Woodhouse:
 "Two minor fixes.

  The first fixes the assignment of SR-IOV virtual functions to the
  correct IOMMU unit, and the second fixes the excessively large (and
  physically contiguous) PASID tables used with SVM"

* git://git.infradead.org/intel-iommu:
  iommu/vt-d: Fix PASID table allocation
  iommu/vt-d: Fix IOMMU lookup for SR-IOV Virtual Functions

8 years agoMerge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus
Linus Torvalds [Sun, 27 Nov 2016 16:22:59 +0000 (08:22 -0800)]
Merge branch 'upstream' of git://git.linux-mips.org/ralf/upstream-linus

Pull MIPS fixes from Ralf Baechle:
 "Another round of MIPS fixes for 4.9:

   - Fix unreadable output in __do_page_fault due to the KERN_CONT
     patchset

   - Correctly handle MIPS R6 fixes to the c0_wired register"

* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus:
  MIPS: mm: Fix output of __do_page_fault
  MIPS: Mask out limit field when calculating wired entry count

8 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Linus Torvalds [Sun, 27 Nov 2016 01:21:13 +0000 (17:21 -0800)]
Merge branch 'for-linus' of git://git./linux/kernel/git/viro/vfs

Pull vfs splice fix from Al Viro.

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  fix default_file_splice_read()

8 years agofix default_file_splice_read()
Al Viro [Sun, 27 Nov 2016 01:05:42 +0000 (20:05 -0500)]
fix default_file_splice_read()

Botched calculation of number of pages.  As the result,
we were dropping pieces when doing splice to pipe from
e.g. 9p.

Reported-by: Alexei Starovoitov <ast@kernel.org>
Tested-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
8 years agoMerge branch 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa...
Linus Torvalds [Sat, 26 Nov 2016 23:28:34 +0000 (15:28 -0800)]
Merge branch 'i2c/for-current' of git://git./linux/kernel/git/wsa/linux

Pull i2c fixes from Wolfram Sang:
 "Here is a revert and two bugfixes for the I2C designware driver.

  Please note that we are still hunting down a regression for the
  i2c-octeon driver. While there is a fix pending, we have unclear
  feedback from the testers currently. An rc8 would be quite helpful
  for this case"

* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
  Revert "i2c: designware: do not disable adapter after transfer"
  i2c: designware: fix rx fifo depth tracking
  i2c: designware: report short transfers

8 years agoMerge branch 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm
Linus Torvalds [Sat, 26 Nov 2016 23:26:20 +0000 (15:26 -0800)]
Merge branch 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm

Pull ARM fix from Russell King:
 "This resolves the ksyms issues by reverting the commit which
  introduced the breakage"

There was what I consider to be a better fix, but it's late in the rc
game, so I'll take the revert.

* 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm:
  Revert "arm: move exports to definitions"

8 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Linus Torvalds [Sat, 26 Nov 2016 21:05:05 +0000 (13:05 -0800)]
Merge git://git./linux/kernel/git/davem/net

Pull networking fixes from David Miller:

 1) Fix leak in fsl/fman driver, from Dan Carpenter.

 2) Call flow dissector initcall earlier than any networking driver can
    register and start to use it, from Eric Dumazet.

 3) Some dup header fixes from Geliang Tang.

 4) TIPC link monitoring compat fix from Jon Paul Maloy.

 5) Link changes require EEE re-negotiation in bcm_sf2 driver, from
    Florian Fainelli.

 6) Fix bogus handle ID passed into tfilter_notify_chain(), from Roman
    Mashak.

 7) Fix dump size calculation in rtnl_calcit(), from Zhang Shengju.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (26 commits)
  tipc: resolve connection flow control compatibility problem
  mvpp2: use correct size for memset
  net/mlx5: drop duplicate header delay.h
  net: ieee802154: drop duplicate header delay.h
  ibmvnic: drop duplicate header seq_file.h
  fsl/fman: fix a leak in tgec_free()
  net: ethtool: don't require CAP_NET_ADMIN for ETHTOOL_GLINKSETTINGS
  tipc: improve sanity check for received domain records
  tipc: fix compatibility bug in link monitoring
  net: ethernet: mvneta: Remove IFF_UNICAST_FLT which is not implemented
  dwc_eth_qos: drop duplicate headers
  net sched filters: fix filter handle ID in tfilter_notify_chain()
  net: dsa: bcm_sf2: Ensure we re-negotiate EEE during after link change
  bnxt: do not busy-poll when link is down
  udplite: call proper backlog handlers
  ipv6: bump genid when the IFA_F_TENTATIVE flag is clear
  net/mlx4_en: Free netdev resources under state lock
  net: revert "net: l2tp: Treat NET_XMIT_CN as success in l2tp_eth_dev_xmit"
  rtnetlink: fix the wrong minimal dump size getting from rtnl_calcit()
  bnxt_en: Fix a VXLAN vs GENEVE issue
  ...

8 years agoMerge branch 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdim...
Linus Torvalds [Sat, 26 Nov 2016 20:24:47 +0000 (12:24 -0800)]
Merge branch 'libnvdimm-fixes' of git://git./linux/kernel/git/nvdimm/nvdimm

Pull libnvdimm fixes from Dan Williams:

 - Fix a crash that occurs at driver initialization if the memory region
   is already busy (request_mem_region() fails).

 - Fix a vma validation check that mistakenly allows a private device-
   dax mapping to be established. Device-dax explicitly forbids private
   mappings so it can guarantee a given fault granularity and backing
   memory type.

 Both of these fixes have soaked in -next and are tagged for -stable.

* 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
  device-dax: fail all private mapping attempts
  device-dax: check devm_nsio_enable() return value

8 years agoMerge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Linus Torvalds [Sat, 26 Nov 2016 20:18:59 +0000 (12:18 -0800)]
Merge tag 'for-linus' of git://git./virt/kvm/kvm

Pull KVM fixes from Radim Krčmář:
 "Four fixes for bugs found by syzkaller on x86, all for stable"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: x86: check for pic and ioapic presence before use
  KVM: x86: fix out-of-bounds accesses of rtc_eoi map
  KVM: x86: drop error recovery in em_jmp_far and em_ret_far
  KVM: x86: fix out-of-bounds access in lapic

8 years agoMerge tag 'powerpc-4.9-6' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc...
Linus Torvalds [Sat, 26 Nov 2016 19:24:03 +0000 (11:24 -0800)]
Merge tag 'powerpc-4.9-6' of git://git./linux/kernel/git/powerpc/linux

Pull powerpc fixes from Michael Ellerman:
 "Fixes marked for stable:
   - Set missing wakeup bit in LPCR on POWER9
   - Fix the early OPAL console wrappers
   - Fixup kernel read only mapping

  Fixes for code merged this cycle:
   - Fix missing CRCs, add more asm-prototypes.h declarations"

* tag 'powerpc-4.9-6' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc/mm: Fixup kernel read only mapping
  powerpc/boot: Fix the early OPAL console wrappers
  powerpc: Fix missing CRCs, add more asm-prototypes.h declarations
  powerpc: Set missing wakeup bit in LPCR on POWER9

8 years agotipc: resolve connection flow control compatibility problem
Jon Paul Maloy [Thu, 24 Nov 2016 23:47:07 +0000 (18:47 -0500)]
tipc: resolve connection flow control compatibility problem

In commit 10724cc7bb78 ("tipc: redesign connection-level flow control")
we replaced the previous message based flow control with one based on
1k blocks. In order to ensure backwards compatibility the mechanism
falls back to using message as base unit when it senses that the peer
doesn't support the new algorithm. The default flow control window,
i.e., how many units can be sent before the sender blocks and waits
for an acknowledge (aka advertisement) is 512. This was tested against
the previous version, which uses an acknowledge frequency of on ack per
256 received message, and found to work fine.

However, we missed the fact that versions older than Linux 3.15 use an
acknowledge frequency of 512, which is exactly the limit where a 4.6+
sender will stop and wait for acknowledge. This would also work fine if
it weren't for the fact that if the first sent message on a 4.6+ server
side is an empty SYNACK, this one is also is counted as a sent message,
while it is not counted as a received message on a legacy 3.15-receiver.
This leads to the sender always being one step ahead of the receiver, a
scenario causing the sender to block after 512 sent messages, while the
receiver only has registered 511 read messages. Hence, the legacy
receiver is not trigged to send an acknowledge, with a permanently
blocked sender as result.

We solve this deadlock by simply allowing the sender to send one more
message before it blocks, i.e., by a making minimal change to the
condition used for determining connection congestion.

Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agomvpp2: use correct size for memset
Arnd Bergmann [Thu, 24 Nov 2016 16:28:12 +0000 (17:28 +0100)]
mvpp2: use correct size for memset

gcc-7 detects a short memset in mvpp2, introduced in the original
merge of the driver:

drivers/net/ethernet/marvell/mvpp2.c: In function 'mvpp2_cls_init':
drivers/net/ethernet/marvell/mvpp2.c:3296:2: error: 'memset' used with length equal to number of elements without multiplication by element size [-Werror=memset-elt-size]

The result seems to be that we write uninitialized data into the
flow table registers, although we did not get any warning about
that uninitialized data usage.

Using sizeof() lets us initialize then entire array instead.

Fixes: 3f518509dedc ("ethernet: Add new driver for Marvell Armada 375 network unit")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet/mlx5: drop duplicate header delay.h
Geliang Tang [Thu, 24 Nov 2016 13:58:33 +0000 (21:58 +0800)]
net/mlx5: drop duplicate header delay.h

Drop duplicate header delay.h from mlx5/core/main.c.

Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Acked-by: Matan Barak <matanb@mellanox.com>
Acked-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: ieee802154: drop duplicate header delay.h
Geliang Tang [Thu, 24 Nov 2016 13:58:32 +0000 (21:58 +0800)]
net: ieee802154: drop duplicate header delay.h

Drop duplicate header delay.h from adf7242.c.

Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Acked-by: Stefan Schmidt <stefan@osg.samsung.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoibmvnic: drop duplicate header seq_file.h
Geliang Tang [Thu, 24 Nov 2016 13:58:29 +0000 (21:58 +0800)]
ibmvnic: drop duplicate header seq_file.h

Drop duplicate header seq_file.h from ibmvnic.c.

Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agofsl/fman: fix a leak in tgec_free()
Dan Carpenter [Thu, 24 Nov 2016 11:20:43 +0000 (14:20 +0300)]
fsl/fman: fix a leak in tgec_free()

We set "tgec->cfg" to NULL before passing it to kfree().  There is no
need to set it to NULL at all.  Let's just delete it.

Fixes: 57ba4c9b56d8 ("fsl/fman: Add FMan MAC support")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: ethtool: don't require CAP_NET_ADMIN for ETHTOOL_GLINKSETTINGS
Miroslav Lichvar [Thu, 24 Nov 2016 09:55:06 +0000 (10:55 +0100)]
net: ethtool: don't require CAP_NET_ADMIN for ETHTOOL_GLINKSETTINGS

The ETHTOOL_GLINKSETTINGS command is deprecating the ETHTOOL_GSET
command and likewise it shouldn't require the CAP_NET_ADMIN capability.

Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agotipc: improve sanity check for received domain records
Jon Paul Maloy [Thu, 24 Nov 2016 04:46:09 +0000 (23:46 -0500)]
tipc: improve sanity check for received domain records

In commit 35c55c9877f8 ("tipc: add neighbor monitoring framework") we
added a data area to the link monitor STATE messages under the
assumption that previous versions did not use any such data area.

For versions older than Linux 4.3 this assumption is not correct. In
those version, all STATE messages sent out from a node inadvertently
contain a 16 byte data area containing a string; -a leftover from
previous RESET messages which were using this during the setup phase.
This string serves no purpose in STATE messages, and should no be there.

Unfortunately, this data area is delivered to the link monitor
framework, where a sanity check catches that it is not a correct domain
record, and drops it. It also issues a rate limited warning about the
event.

Since such events occur much more frequently than anticipated, we now
choose to remove the warning in order to not fill the kernel log with
useless contents. We also make the sanity check stricter, to further
reduce the risk that such data is inavertently admitted.

Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agotipc: fix compatibility bug in link monitoring
Jon Paul Maloy [Thu, 24 Nov 2016 02:05:26 +0000 (21:05 -0500)]
tipc: fix compatibility bug in link monitoring

commit 817298102b0b ("tipc: fix link priority propagation") introduced a
compatibility problem between TIPC versions newer than Linux 4.6 and
those older than Linux 4.4. In versions later than 4.4, link STATE
messages only contain a non-zero link priority value when the sender
wants the receiver to change its priority. This has the effect that the
receiver resets itself in order to apply the new priority. This works
well, and is consistent with the said commit.

However, in versions older than 4.4 a valid link priority is present in
all sent link STATE messages, leading to cyclic link establishment and
reset on the 4.6+ node.

We fix this by adding a test that the received value should not only
be valid, but also differ from the current value in order to cause the
receiving link endpoint to reset.

Reported-by: Amar Nv <amar.nv005@gmail.com>
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: ethernet: mvneta: Remove IFF_UNICAST_FLT which is not implemented
Andrew Lunn [Wed, 23 Nov 2016 23:08:13 +0000 (00:08 +0100)]
net: ethernet: mvneta: Remove IFF_UNICAST_FLT which is not implemented

The mvneta driver advertises it supports IFF_UNICAST_FLT. However, it
actually does not. The hardware probably does support it, but there is
no code to configure the filter. As a quick and simple fix, remove the
flag. This will cause the core to fall back to promiscuous mode.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Fixes: b50b72de2f2f ("net: mvneta: enable features before registering the driver")
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge branch 'parisc-4.9-4' of git://git.kernel.org/pub/scm/linux/kernel/git/deller...
Linus Torvalds [Sat, 26 Nov 2016 00:47:15 +0000 (16:47 -0800)]
Merge branch 'parisc-4.9-4' of git://git./linux/kernel/git/deller/parisc-linux

Pull parisc fixes from Helge Deller:
 "On parisc we were still seeing occasional random segmentation faults
  and memory corruption on SMP machines. Dave Anglin then looked again
  at the TLB related code and found two issues in the PCI DMA and
  generic TLB flush functions.

  Then, in our startup code we had some timing of the cache and TLB
  functions to calculate a threshold when to use a complete TLB/cache
  flush or just to flush a specific range. This code produced a race
  with newly started CPUs and thus lead to occasional kernel crashes
  (due to stale TLB/cache entries). The patch by Dave fixes this issue
  by flushing the local caches before starting secondary CPUs and by
  removing the race.

  The last problem fixed by this series is that we quite often suffered
  from hung tasks and self-detected stalls on the CPUs. It was somehow
  clear that this was related to the (in v4.7) newly introduced cr16
  clocksource and the own implementation of sched_clock(). I replaced
  the open-coded sched_clock() function and switched to the generic
  sched_clock() implementation which seems to have fixed this isse as
  well.

  All patches have been sucessfully tested on a variety of machines,
  including our debian buildd servers.

  All patches (beside the small pr_cont fix) are tagged for stable
  releases"

* 'parisc-4.9-4' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc: Also flush data TLB in flush_icache_page_asm
  parisc: Fix race in pci-dma.c
  parisc: Switch to generic sched_clock implementation
  parisc: Fix races in parisc_setup_cache_timing()
  parisc: Fix printk continuations in system detection

8 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris...
Linus Torvalds [Fri, 25 Nov 2016 23:53:45 +0000 (15:53 -0800)]
Merge branch 'for-linus' of git://git./linux/kernel/git/jmorris/linux-security

Pull keys fixes from James Morris:
 "From David:

   - Fix mpi_powm()'s handling of a number with a zero exponent
     [CVE-2016-8650].

     Integrate my and Andrey's patches for mpi_powm() and use
     mpi_resize() instead of RESIZE_IF_NEEDED() - the latter adds a
     duplicate check into the execution path of a trivial case we
     don't normally expect to be taken.

   - Fix double free in X.509 error handling"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security:
  mpi: Fix NULL ptr dereference in mpi_powm() [ver #3]
  X.509: Fix double free in x509_cert_parse() [ver #3]

8 years agoFix subtle CONFIG_MODVERSIONS problems
Linus Torvalds [Fri, 25 Nov 2016 23:44:47 +0000 (15:44 -0800)]
Fix subtle CONFIG_MODVERSIONS problems

CONFIG_MODVERSIONS has been broken for pretty much the whole 4.9 series,
and quite frankly, nobody has cared very deeply.  We absolutely know how
to fix it, and it's not _complicated_, but it's not exactly pretty
either.

This oneliner fixes it without the ugliness, and allows for further
future cleanups.

  "We've secretly replaced their regular MODVERSIONS with nothing at
   all, let's see if they notice"

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agoMerge tag 'acpi-4.9-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael...
Linus Torvalds [Fri, 25 Nov 2016 23:16:51 +0000 (15:16 -0800)]
Merge tag 'acpi-4.9-rc7' of git://git./linux/kernel/git/rafael/linux-pm

Pull ACPI fixes from Rafael Wysocki:
 "Two ACPI fixes for 4.9-rc7.

  One of them reverts a recent ACPI commit that attempted to improve
  reboot/power-off on some systems, but introduced problems elsewhere,
  and the other one fixes kernel builds with the new WDAT watchdog
  driver enabled in some configurations.

  Specifics:

   - Revert the recent commit that caused the ACPI _PTS method to be
     executed in the power-off/reboot code path (as per the
     specification) in an attempt to improve things on some systems
     (apparently expecting _PTS to be executed in that code path), but
     broke power-off/reboot on at least one other machine (Rafael
     Wysocki).

   - Fix kernel builds with the new WDAT watchdog driver enabled in some
     configurations by explicitly selecting WATCHDOG_CORE when enabling
     the WDAT watchdog driver (Mika Westerberg)"

* tag 'acpi-4.9-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  watchdog: wdat_wdt: Select WATCHDOG_CORE
  Revert "ACPI: Execute _PTS before system reboot"

8 years agoMAINTAINERS: Add bug tracking system location entry type
Rafael J. Wysocki [Thu, 24 Nov 2016 23:13:56 +0000 (00:13 +0100)]
MAINTAINERS: Add bug tracking system location entry type

Following the kernel Bugzilla discussion during the Kernel Summit
(https://lwn.net/Articles/705245/), add bug tracking system location
entry type (B) to MAINTAINERS and populate it for several subsystems
known to be using the kernel BZ actively (and add the upstream BZ for
ACPICA too).

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agoRevert "i2c: designware: do not disable adapter after transfer"
Jarkko Nikula [Fri, 25 Nov 2016 15:22:27 +0000 (17:22 +0200)]
Revert "i2c: designware: do not disable adapter after transfer"

This reverts commit 0317e6c0f1dc1ba86b8d9dccc010c5e77b8355fa.

Srinivas reported recently touchscreen and touchpad stopped working in
Haswell based machine in Linux 4.9-rc series with timeout errors from
i2c_designware:

[   16.508013] i2c_designware INT33C3:00: controller timed out
[   16.508302] i2c_hid i2c-MSFT0001:02: failed to change power setting.
[   17.532016] i2c_designware INT33C3:00: controller timed out
[   18.556022] i2c_designware INT33C3:00: controller timed out
[   18.556315] i2c_hid i2c-ATML1000:00: failed to retrieve report from device.

I managed to reproduce similar errors on another Haswell based machine
where touchscreen initialization fails maybe in every 1/5 - 1/2 boots.
Since root cause for these errors is not clear yet and debugging is
ongoing it's better to revert this commit as we are near to release.

Reported-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
8 years agoMerge branches 'acpi-sleep-fixes' and 'acpi-wdat-fixes'
Rafael J. Wysocki [Fri, 25 Nov 2016 21:24:07 +0000 (22:24 +0100)]
Merge branches 'acpi-sleep-fixes' and 'acpi-wdat-fixes'

* acpi-sleep-fixes:
  Revert "ACPI: Execute _PTS before system reboot"

* acpi-wdat-fixes:
  watchdog: wdat_wdt: Select WATCHDOG_CORE

8 years agoMerge tag 'linux-can-fixes-for-4.9-20161123' of git://git.kernel.org/pub/scm/linux...
David S. Miller [Fri, 25 Nov 2016 21:17:12 +0000 (16:17 -0500)]
Merge tag 'linux-can-fixes-for-4.9-20161123' of git://git./linux/kernel/git/mkl/linux-can

Marc Kleine-Budde says:

====================
pull-request: can 2016-11-23

this is a pull request for net/master.

The patch by Oliver Hartkopp for the broadcast manager (bcm) fixes the
CAN-FD support, which may cause an out-of-bounds access otherwise.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agodwc_eth_qos: drop duplicate headers
Geliang Tang [Wed, 23 Nov 2016 14:24:35 +0000 (22:24 +0800)]
dwc_eth_qos: drop duplicate headers

Drop duplicate headers types.h and delay.h from dwc_eth_qos.c.

Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge tag 'mfd-fixes-4.9.1' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd
Linus Torvalds [Fri, 25 Nov 2016 19:36:35 +0000 (11:36 -0800)]
Merge tag 'mfd-fixes-4.9.1' of git://git./linux/kernel/git/lee/mfd

Pull MFD fixes from Lee Jones:
 "Received a copule of last minute fixes for v4.9.

  The patches from Viresh are fixing issues displayed in KernelCI"

* tag 'mfd-fixes-4.9.1' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd:
  mfd: wm8994-core: Don't use managed regulator bulk get API
  mfd: wm8994-core: Disable regulators before removing them
  mfd: syscon: Support native-endian regmaps

8 years agoMerge tag 'media/v4.9-4' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab...
Linus Torvalds [Fri, 25 Nov 2016 19:31:01 +0000 (11:31 -0800)]
Merge tag 'media/v4.9-4' of git://git./linux/kernel/git/mchehab/linux-media

Pull media fix from Mauro Carvalho Chehab:
 "Fix for the firmware load logic of the tuner-xc2028 driver"

* tag 'media/v4.9-4' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media:
  xc2028: Fix use-after-free bug properly

8 years agoMerge tag 'drm-fixes-for-v4.9-rc7' of git://people.freedesktop.org/~airlied/linux
Linus Torvalds [Fri, 25 Nov 2016 18:51:35 +0000 (10:51 -0800)]
Merge tag 'drm-fixes-for-v4.9-rc7' of git://people.freedesktop.org/~airlied/linux

Pull drm fixes from Dave Airlie:
 "Seems to be quietening down nicely, a few mediatek, one exynos and one
  hdlcd fix, along with two amd fixes"

* tag 'drm-fixes-for-v4.9-rc7' of git://people.freedesktop.org/~airlied/linux:
  gpu/drm/exynos/exynos_hdmi - Unmap region obtained by of_iomap
  drm/mediatek: fix null pointer dereference
  drm/mediatek: fixed the calc method of data rate per lane
  drm/mediatek: fix a typo of DISP_OD_CFG to OD_RELAYMODE
  drm/radeon: fix power state when port pm is unavailable (v2)
  drm/amdgpu: fix power state when port pm is unavailable
  drm/arm: hdlcd: fix plane base address update
  drm/amd/powerplay: avoid out of bounds access on array ps.

8 years agoparisc: Also flush data TLB in flush_icache_page_asm
John David Anglin [Fri, 25 Nov 2016 01:18:14 +0000 (20:18 -0500)]
parisc: Also flush data TLB in flush_icache_page_asm

This is the second issue I noticed in reviewing the parisc TLB code.

The fic instruction may use either the instruction or data TLB in
flushing the instruction cache.  Thus, on machines with a split TLB, we
should also flush the data TLB after setting up the temporary alias
registers.

Although this has no functional impact, I changed the pdtlb and pitlb
instructions to consistently use the index register %r0.  These
instructions do not support integer displacements.

Tested on rp3440 and c8000.

Signed-off-by: John David Anglin <dave.anglin@bell.net>
Cc: <stable@vger.kernel.org> # v3.16+
Signed-off-by: Helge Deller <deller@gmx.de>
8 years agoparisc: Fix race in pci-dma.c
John David Anglin [Fri, 25 Nov 2016 01:06:32 +0000 (20:06 -0500)]
parisc: Fix race in pci-dma.c

We are still troubled by occasional random segmentation faults and
memory memory corruption on SMP machines.  The causes quite a few
package builds to fail on the Debian buildd machines for parisc.  When
gcc-6 failed to build three times in a row, I looked again at the TLB
related code.  I found a couple of issues.  This is the first.

In general, we need to ensure page table updates and corresponding TLB
purges are atomic.  The attached patch fixes an instance in pci-dma.c
where the page table update was not guarded by the TLB lock.

Tested on rp3440 and c8000.  So far, no further random segmentation
faults have been observed.

Signed-off-by: John David Anglin <dave.anglin@bell.net>
Cc: <stable@vger.kernel.org> # v3.16+
Signed-off-by: Helge Deller <deller@gmx.de>
8 years agoparisc: Switch to generic sched_clock implementation
Helge Deller [Tue, 22 Nov 2016 17:08:30 +0000 (18:08 +0100)]
parisc: Switch to generic sched_clock implementation

Drop the open-coded sched_clock() function and replace it by the provided
GENERIC_SCHED_CLOCK implementation.  We have seen quite some hung tasks in the
past, which seem to be fixed by this patch.

Signed-off-by: Helge Deller <deller@gmx.de>
Cc: <stable@vger.kernel.org> # v4.7+
Signed-off-by: Helge Deller <deller@gmx.de>
8 years agoparisc: Fix races in parisc_setup_cache_timing()
John David Anglin [Mon, 21 Nov 2016 02:12:36 +0000 (21:12 -0500)]
parisc: Fix races in parisc_setup_cache_timing()

Helge reported to me the following startup crash:

[    0.000000] Linux version 4.8.0-1-parisc64-smp (debian-kernel@lists.debian.org) (gcc version 5.4.1 20161019 (GCC) ) #1 SMP Debian 4.8.7-1 (2016-11-13)
[    0.000000] The 64-bit Kernel has started...
[    0.000000] Kernel default page size is 4 KB. Huge pages enabled with 1 MB physical and 2 MB virtual size.
[    0.000000] Determining PDC firmware type: System Map.
[    0.000000] model 9000/785/J5000
[    0.000000] Total Memory: 2048 MB
[    0.000000] Memory: 2018528K/2097152K available (9272K kernel code, 3053K rwdata, 1319K rodata, 1024K init, 840K bss, 78624K reserved, 0K cma-reserved)
[    0.000000] virtual kernel memory layout:
[    0.000000]     vmalloc : 0x0000000000008000 - 0x000000003f000000   (1007 MB)
[    0.000000]     memory  : 0x0000000040000000 - 0x00000000c0000000   (2048 MB)
[    0.000000]       .init : 0x0000000040100000 - 0x0000000040200000   (1024 kB)
[    0.000000]       .data : 0x0000000040b0e000 - 0x0000000040f533e0   (4372 kB)
[    0.000000]       .text : 0x0000000040200000 - 0x0000000040b0e000   (9272 kB)
[    0.768910] Brought up 1 CPUs
[    0.992465] NET: Registered protocol family 16
[    2.429981] Releasing cpu 1 now, hpa=fffffffffffa2000
[    2.635751] CPU(s): 2 out of 2 PA8500 (PCX-W) at 440.000000 MHz online
[    2.726692] Setting cache flush threshold to 1024 kB
[    2.729932] Not-handled unaligned insn 0x43ffff80
[    2.798114] Setting TLB flush threshold to 140 kB
[    2.928039] Unaligned handler failed, ret = -1
[    3.000419]       _______________________________
[    3.000419]      < Your System ate a SPARC! Gah! >
[    3.000419]       -------------------------------
[    3.000419]              \   ^__^
[    3.000419]                  (__)\       )\/\
[    3.000419]                   U  ||----w |
[    3.000419]                      ||     ||
[    9.340055] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.8.0-1-parisc64-smp #1 Debian 4.8.7-1
[    9.448082] task: 00000000bfd48060 task.stack: 00000000bfd50000
[    9.528040]
[   10.760029] IASQ: 0000000000000000 0000000000000000 IAOQ: 000000004025d154 000000004025d158
[   10.868052]  IIR: 43ffff80    ISR: 0000000000340000  IOR: 000001ff54150960
[   10.960029]  CPU:        1   CR30: 00000000bfd50000 CR31: 0000000011111111
[   11.052057]  ORIG_R28: 000000004021e3b4
[   11.100045]  IAOQ[0]: irq_exit+0x94/0x120
[   11.152062]  IAOQ[1]: irq_exit+0x98/0x120
[   11.208031]  RP(r2): irq_exit+0xb8/0x120
[   11.256074] Backtrace:
[   11.288067]  [<00000000402cd944>] cpu_startup_entry+0x1e4/0x598
[   11.368058]  [<0000000040109528>] smp_callin+0x2c0/0x2f0
[   11.436308]  [<00000000402b53fc>] update_curr+0x18c/0x2d0
[   11.508055]  [<00000000402b73b8>] dequeue_entity+0x2c0/0x1030
[   11.584040]  [<00000000402b3cc0>] set_next_entity+0x80/0xd30
[   11.660069]  [<00000000402c1594>] pick_next_task_fair+0x614/0x720
[   11.740085]  [<000000004020dd34>] __schedule+0x394/0xa60
[   11.808054]  [<000000004020e488>] schedule+0x88/0x118
[   11.876039]  [<0000000040283d3c>] rescuer_thread+0x4d4/0x5b0
[   11.948090]  [<000000004028fc4c>] kthread+0x1ec/0x248
[   12.016053]  [<0000000040205020>] end_fault_vector+0x20/0xc0
[   12.092239]  [<00000000402050c0>] _switch_to_ret+0x0/0xf40
[   12.164044]
[   12.184036] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.8.0-1-parisc64-smp #1 Debian 4.8.7-1
[   12.244040] Backtrace:
[   12.244040]  [<000000004021c480>] show_stack+0x68/0x80
[   12.244040]  [<00000000406f332c>] dump_stack+0xec/0x168
[   12.244040]  [<000000004021c74c>] die_if_kernel+0x25c/0x430
[   12.244040]  [<000000004022d320>] handle_unaligned+0xb48/0xb50
[   12.244040]
[   12.632066] ---[ end trace 9ca05a7215c7bbb2 ]---
[   12.692036] Kernel panic - not syncing: Attempted to kill the idle task!

We have the insn 0x43ffff80 in IIR but from IAOQ we should have:
   4025d150:   0f f3 20 df     ldd,s r19(r31),r31
   4025d154:   0f 9f 00 9c     ldw r31(ret0),ret0
   4025d158:   bf 80 20 58     cmpb,*<> r0,ret0,4025d18c <irq_exit+0xcc>

Cpu0 has just completed running parisc_setup_cache_timing:

[    2.429981] Releasing cpu 1 now, hpa=fffffffffffa2000
[    2.635751] CPU(s): 2 out of 2 PA8500 (PCX-W) at 440.000000 MHz online
[    2.726692] Setting cache flush threshold to 1024 kB
[    2.729932] Not-handled unaligned insn 0x43ffff80
[    2.798114] Setting TLB flush threshold to 140 kB
[    2.928039] Unaligned handler failed, ret = -1

From the backtrace, cpu1 is in smp_callin:

void __init smp_callin(void)
{
       int slave_id = cpu_now_booting;

       smp_cpu_init(slave_id);
       preempt_disable();

       flush_cache_all_local(); /* start with known state */
       flush_tlb_all_local(NULL);

       local_irq_enable();  /* Interrupts have been off until now */

       cpu_startup_entry(CPUHP_AP_ONLINE_IDLE);

So, it has just flushed its caches and the TLB. It would seem either the
flushes in parisc_setup_cache_timing or smp_callin have corrupted kernel
memory.

The attached patch reworks parisc_setup_cache_timing to remove the races
in setting the cache and TLB flush thresholds. It also corrects the
number of bytes flushed in the TLB calculation.

The patch flushes the cache and TLB on cpu0 before starting the
secondary processors so that they are started from a known state.

Tested with a few reboots on c8000.

Signed-off-by: John David Anglin <dave.anglin@bell.net>
Cc: <stable@vger.kernel.org> # v3.18+
Signed-off-by: Helge Deller <deller@gmx.de>
8 years agomfd: wm8994-core: Don't use managed regulator bulk get API
Viresh Kumar [Thu, 27 Oct 2016 10:20:18 +0000 (15:50 +0530)]
mfd: wm8994-core: Don't use managed regulator bulk get API

The kernel WARNs and then crashes today if wm8994_device_init() fails
after calling devm_regulator_bulk_get().

That happens because there are multiple devices involved here and the
order in which managed resources are freed isn't correct.

The regulators are added as children of wm8994->dev.  Whereas,
devm_regulator_bulk_get() receives wm8994->dev as the device, though it
gets the same regulators which were added as children of wm8994->dev
earlier.

During failures, the children are removed first and the core eventually
calls regulator_unregister() for them. As regulator_put() was never done
for them (opposite of devm_regulator_bulk_get()), the kernel WARNs at

WARN_ON(rdev->open_count);

And eventually it crashes from debugfs_remove_recursive().

--------x------------------x----------------

 wm8994 3-001a: Device is not a WM8994, ID is 0
 ------------[ cut here ]------------
 WARNING: CPU: 0 PID: 1 at /mnt/ssd/all/work/repos/devel/linux/drivers/regulator/core.c:4072 regulator_unregister+0xc8/0xd0
 Modules linked in:
 CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.8.0-rc6-00154-g54fe84cbd50b #41
 Hardware name: SAMSUNG EXYNOS (Flattened Device Tree)
 [<c010e24c>] (unwind_backtrace) from [<c010af38>] (show_stack+0x10/0x14)
 [<c010af38>] (show_stack) from [<c032a1c4>] (dump_stack+0x88/0x9c)
 [<c032a1c4>] (dump_stack) from [<c011a98c>] (__warn+0xe8/0x100)
 [<c011a98c>] (__warn) from [<c011aa54>] (warn_slowpath_null+0x20/0x28)
 [<c011aa54>] (warn_slowpath_null) from [<c0384a0c>] (regulator_unregister+0xc8/0xd0)
 [<c0384a0c>] (regulator_unregister) from [<c0406434>] (release_nodes+0x16c/0x1dc)
 [<c0406434>] (release_nodes) from [<c04039c4>] (__device_release_driver+0x8c/0x110)
 [<c04039c4>] (__device_release_driver) from [<c0403a64>] (device_release_driver+0x1c/0x28)
 [<c0403a64>] (device_release_driver) from [<c0402b24>] (bus_remove_device+0xd8/0x104)
 [<c0402b24>] (bus_remove_device) from [<c03ffcd8>] (device_del+0x10c/0x218)
 [<c03ffcd8>] (device_del) from [<c0404e4c>] (platform_device_del+0x1c/0x88)
 [<c0404e4c>] (platform_device_del) from [<c0404ec4>] (platform_device_unregister+0xc/0x20)
 [<c0404ec4>] (platform_device_unregister) from [<c0428bc0>] (mfd_remove_devices_fn+0x5c/0x64)
 [<c0428bc0>] (mfd_remove_devices_fn) from [<c03ff9d8>] (device_for_each_child_reverse+0x4c/0x78)
 [<c03ff9d8>] (device_for_each_child_reverse) from [<c04288c4>] (mfd_remove_devices+0x20/0x30)
 [<c04288c4>] (mfd_remove_devices) from [<c042758c>] (wm8994_device_init+0x2ac/0x7f0)
 [<c042758c>] (wm8994_device_init) from [<c04f14a8>] (i2c_device_probe+0x178/0x1fc)
 [<c04f14a8>] (i2c_device_probe) from [<c04036fc>] (driver_probe_device+0x214/0x2c0)
 [<c04036fc>] (driver_probe_device) from [<c0403854>] (__driver_attach+0xac/0xb0)
 [<c0403854>] (__driver_attach) from [<c0401a74>] (bus_for_each_dev+0x68/0x9c)
 [<c0401a74>] (bus_for_each_dev) from [<c0402cf0>] (bus_add_driver+0x1a0/0x218)
 [<c0402cf0>] (bus_add_driver) from [<c040406c>] (driver_register+0x78/0xf8)
 [<c040406c>] (driver_register) from [<c04f20a0>] (i2c_register_driver+0x34/0x84)
 [<c04f20a0>] (i2c_register_driver) from [<c01017d0>] (do_one_initcall+0x40/0x170)
 [<c01017d0>] (do_one_initcall) from [<c0a00dbc>] (kernel_init_freeable+0x15c/0x1fc)
 [<c0a00dbc>] (kernel_init_freeable) from [<c06e07b0>] (kernel_init+0x8/0x114)
 [<c06e07b0>] (kernel_init) from [<c0107978>] (ret_from_fork+0x14/0x3c)
 ---[ end trace 0919d3d0bc998260 ]---

 [snip..]

 Unable to handle kernel NULL pointer dereference at virtual address 00000078
 pgd = c0004000
 [00000078] *pgd=00000000
 Internal error: Oops: 5 [#1] PREEMPT SMP ARM
 Modules linked in:
 CPU: 0 PID: 1 Comm: swapper/0 Tainted: G        W       4.8.0-rc6-00154-g54fe84cbd50b #41
 Hardware name: SAMSUNG EXYNOS (Flattened Device Tree)
 task: ee874000 task.stack: ee878000
 PC is at down_write+0x14/0x54
 LR is at debugfs_remove_recursive+0x30/0x150

 [snip..]

 [<c06e489c>] (down_write) from [<c02e9954>] (debugfs_remove_recursive+0x30/0x150)
 [<c02e9954>] (debugfs_remove_recursive) from [<c0382b78>] (_regulator_put+0x24/0xac)
 [<c0382b78>] (_regulator_put) from [<c0382c1c>] (regulator_put+0x1c/0x2c)
 [<c0382c1c>] (regulator_put) from [<c0406434>] (release_nodes+0x16c/0x1dc)
 [<c0406434>] (release_nodes) from [<c04035d4>] (driver_probe_device+0xec/0x2c0)
 [<c04035d4>] (driver_probe_device) from [<c0403854>] (__driver_attach+0xac/0xb0)
 [<c0403854>] (__driver_attach) from [<c0401a74>] (bus_for_each_dev+0x68/0x9c)
 [<c0401a74>] (bus_for_each_dev) from [<c0402cf0>] (bus_add_driver+0x1a0/0x218)
 [<c0402cf0>] (bus_add_driver) from [<c040406c>] (driver_register+0x78/0xf8)
 [<c040406c>] (driver_register) from [<c04f20a0>] (i2c_register_driver+0x34/0x84)
 [<c04f20a0>] (i2c_register_driver) from [<c01017d0>] (do_one_initcall+0x40/0x170)
 [<c01017d0>] (do_one_initcall) from [<c0a00dbc>] (kernel_init_freeable+0x15c/0x1fc)
 [<c0a00dbc>] (kernel_init_freeable) from [<c06e07b0>] (kernel_init+0x8/0x114)
 [<c06e07b0>] (kernel_init) from [<c0107978>] (ret_from_fork+0x14/0x3c)
 Code: e1a04000 f590f000 e3a03001 e34f3fff (e1902f9f)
 ---[ end trace 0919d3d0bc998262 ]---

--------x------------------x----------------

Fix the kernel warnings and crashes by using regulator_bulk_get()
instead of devm_regulator_bulk_get() and explicitly freeing the supplies
in exit paths.

Tested on Exynos 5250, dual core ARM A15 machine.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
8 years agomfd: wm8994-core: Disable regulators before removing them
Viresh Kumar [Fri, 16 Sep 2016 03:26:59 +0000 (08:56 +0530)]
mfd: wm8994-core: Disable regulators before removing them

The order in which resources were freed in wm8994_device_exit() isn't
correct. The regulators are removed before they are disabled.

Fix it by reordering code a bit, which makes it exact opposite of
wm8994_device_init() as well.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
8 years agoMIPS: mm: Fix output of __do_page_fault
Matt Redfearn [Wed, 9 Nov 2016 13:26:25 +0000 (13:26 +0000)]
MIPS: mm: Fix output of __do_page_fault

Since commit 4bcc595ccd80 ("printk: reinstate KERN_CONT for printing
continuation lines") the output from __do_page_fault on MIPS has been
pretty unreadable due to the lack of KERN_CONT markers. Use pr_cont
to provide the appropriate markers & restore the expected output.

Signed-off-by: Matt Redfearn <matt.redfearn@imgtec.com>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/14544/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>