2010-07-07 11:12:45 +00:00
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From: Rajashekhar M A <rajs@netapp.com>
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Subject: I/O errors for ALUA state transitions
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References: bnc#491289
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Patch-mainline: not yet
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When a SLES11 host is configured with a few LUNs and IO is running,
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injecting FC faults repeatedly leads to path recovery problems.
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The LUNs have 4 paths each and 3 of them come back active after
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say an FC fault which makes two of the paths go down, instead of
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all 4. This happens after several iterations of continuous FC faults.
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Reason here is that we're returning an I/O error whenever we're
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encountering sense code 06/04/0a (LOGICAL UNIT NOT ACCESSIBLE,
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ASYMMETRIC ACCESS STATE TRANSITION) instead of retrying.
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Signed-off-by: Hannes Reinecke <hare@suse.de>
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---
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drivers/scsi/scsi_error.c | 3 ++-
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1 file changed, 2 insertions(+), 1 deletion(-)
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--- a/drivers/scsi/scsi_error.c
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+++ b/drivers/scsi/scsi_error.c
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2011-04-19 20:09:59 +00:00
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@@ -376,7 +376,8 @@ static int scsi_check_sense(struct scsi_
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2010-07-07 11:12:45 +00:00
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* if the device is in the process of becoming ready, we
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* should retry.
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*/
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- if ((sshdr.asc == 0x04) && (sshdr.ascq == 0x01))
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+ if ((sshdr.asc == 0x04) &&
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+ (sshdr.ascq == 0x01 || sshdr.ascq == 0x0a))
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return NEEDS_RETRY;
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/*
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* if the device is not started, we need to wake
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