xprtrdma: Protect ia->ri_id when unmapping/invalidating MRs
authorChuck Lever <chuck.lever@oracle.com>
Tue, 29 Jul 2014 21:23:25 +0000 (17:23 -0400)
committerAnna Schumaker <Anna.Schumaker@Netapp.com>
Thu, 31 Jul 2014 20:22:52 +0000 (16:22 -0400)
commit73806c8832b3438ef0439603dab1f3cfc61cb6cd
tree8d583ca98b5c68ab0fc89802295ab81bbaf0e590
parent5fc83f470d8ada25927701512cf94a53dab6c4c8
xprtrdma: Protect ia->ri_id when unmapping/invalidating MRs

Ensure ia->ri_id remains valid while invoking dma_unmap_page() or
posting LOCAL_INV during a transport reconnect. Otherwise,
ia->ri_id->device or ia->ri_id->qp is NULL, which triggers a panic.

BugLink: https://bugzilla.linux-nfs.org/show_bug.cgi?id=259
Fixes: ec62f40 'xprtrdma: Ensure ia->ri_id->qp is not NULL when reconnecting'
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Tested-by: Steve Wise <swise@opengridcomputing.com>
Tested-by: Shirley Ma <shirley.ma@oracle.com>
Tested-by: Devesh Sharma <devesh.sharma@emulex.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
net/sunrpc/xprtrdma/verbs.c
net/sunrpc/xprtrdma/xprt_rdma.h