scsi: sas: scsi_queue_work can fail, so make callers aware
authorJohannes Thumshirn <jthumshirn@suse.de>
Wed, 14 Jun 2017 11:52:43 +0000 (13:52 +0200)
committerMartin K. Petersen <martin.petersen@oracle.com>
Wed, 28 Jun 2017 01:28:04 +0000 (21:28 -0400)
commit6d311fa7d2c18659d040b9beba5e41fe24c2a6f5
treeb5bbaaeaa6bb080b2687787f05dd057f574d91bc
parentd06c587dd723882cd99c89d335b89c535079cdb1
scsi: sas: scsi_queue_work can fail, so make callers aware

libsas uses scsi_queue_work() to queue its internal event notifications.
scsi_queue_work() can return -EINVAL if the work queue doesn't exist and
it does call queue_work() which can return false if the work is already
queued.

Make the SAS event code capable of returning errors up to the caller,
which is handy when changing to dynamically allocated work in libsas
as well, as discussed here: https://lkml.org/lkml/2017/6/14/121.

[mkp: fixed typo]

Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
drivers/scsi/libsas/sas_event.c
drivers/scsi/libsas/sas_internal.h
include/scsi/libsas.h