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[SCSI] libsas: fix runaway error handler problem

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libsas makes use of scsi_schedule_eh() but forgets to clear the
host_eh_scheduled flag in its error handling routine.  Because of this,
the error handler thread never gets to sleep; it's constantly awake and
trying to run the error routine leading to console spew and inability to
run anything else (at least on a UP system).  The fix is to clear the
flag as we splice the work queue.

Cc: stable@kernel.org
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
This commit is contained in:
James Bottomley 2011-01-20 17:26:44 -06:00
parent ac61c46f4f
commit 9ee91f7fb5
1 changed files with 1 additions and 0 deletions
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drivers/scsi/libsas/sas_scsi_host.c
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@ -646,6 +646,7 @@ void sas_scsi_recover_host(struct Scsi_Host *shost)
spin_lock_irqsave(shost->host_lock, flags);
list_splice_init(&shost->eh_cmd_q, &eh_work_q);
shost->host_eh_scheduled = 0;
spin_unlock_irqrestore(shost->host_lock, flags);
SAS_DPRINTK("Enter %s\n", __func__);