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| author |   Bart Van Assche <bart.vanassche@sandisk.com> | 2015-05-18 13:22:44 +0200 |
|---|---|---|
| committer |   Doug Ledford <dledford@redhat.com> | 2015-05-18 13:35:55 -0400 |
| commit | 535fb906225fb7436cb658144d0c0cea14a26f3e (patch) | |
| tree | 6d93870a5a22651dde4f5d0e64ea0d58e9d1139f /drivers/scsi/scsi_transport_srp.c | |
| parent | scsi_transport_srp: Introduce srp_wait_for_queuecommand() (diff) | |
| download | linux-dev-535fb906225fb7436cb658144d0c0cea14a26f3e.tar.xz linux-dev-535fb906225fb7436cb658144d0c0cea14a26f3e.zip | |
scsi_transport_srp: Fix a race condition
Avoid that srp_terminate_io() can get invoked while srp_queuecommand()
is in progress. This patch avoids that an I/O timeout can trigger the
following kernel warning:
WARNING: at drivers/infiniband/ulp/srp/ib_srp.c:1447 srp_terminate_io+0xef/0x100 [ib_srp]()
Call Trace:
[<ffffffff814c65a2>] dump_stack+0x4e/0x68
[<ffffffff81051f71>] warn_slowpath_common+0x81/0xa0
[<ffffffff8105204a>] warn_slowpath_null+0x1a/0x20
[<ffffffffa075f51f>] srp_terminate_io+0xef/0x100 [ib_srp]
[<ffffffffa07495da>] __rport_fail_io_fast+0xba/0xc0 [scsi_transport_srp]
[<ffffffffa0749a90>] rport_fast_io_fail_timedout+0xe0/0xf0 [scsi_transport_srp]
[<ffffffff8106e09b>] process_one_work+0x1db/0x780
[<ffffffff8106e75b>] worker_thread+0x11b/0x450
[<ffffffff81073c64>] kthread+0xe4/0x100
[<ffffffff814cf26c>] ret_from_fork+0x7c/0xb0
See also patch "scsi_transport_srp: Add transport layer error
handling" (commit ID 29c17324803c).
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Cc: James Bottomley <JBottomley@Odin.com>
Cc: Sagi Grimberg <sagig@mellanox.com>
Cc: Sebastian Parschauer <sebastian.riemer@profitbricks.com>
Cc: <stable@vger.kernel.org> #v3.13
Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to '')
| -rw-r--r-- | drivers/scsi/scsi_transport_srp.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/scsi/scsi_transport_srp.c b/drivers/scsi/scsi_transport_srp.c index e05cd7e2d6d3..f115f67a6ba5 100644 --- a/drivers/scsi/scsi_transport_srp.c +++ b/drivers/scsi/scsi_transport_srp.c @@ -439,8 +439,10 @@ static void __rport_fail_io_fast(struct srp_rport *rport) /* Involve the LLD if possible to terminate all I/O on the rport. */ i = to_srp_internal(shost->transportt); - if (i->f->terminate_rport_io) + if (i->f->terminate_rport_io) { + srp_wait_for_queuecommand(shost); i->f->terminate_rport_io(rport); + } } /** |