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[SCSI] qla2xxx: Group CS_RESET return status with other link level event statuses.

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Currently when we receive a CS_RESET as a response for a SCSI command the
driver will return DID_TRANSPORT_DISRUPTED back to the SCSI mid-layer.  There
are certain circumstances where this could cause the mid-layer to exhaust all of
its retries if the FC port goes away for a short time.  This will result in
commands being prematurly failed.  Moving the CS_RESET return code to be
grouped with other link level events will cause the FC transport layer to block
that target's queue thus preventing the premature exhaustion of retries.

Signed-off-by: Chad Dupuis <chad.dupuis@qlogic.com>
Signed-off-by: Madhuranath Iyengar <Madhu.Iyengar@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
This commit is contained in:
Chad Dupuis 2010-10-15 11:27:42 -07:00 committed by James Bottomley
parent 4d97cc5342
commit ff454b01b4
1 changed files with 2 additions and 4 deletions
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6
drivers/scsi/qla2xxx/qla_isr.c
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@ -1757,6 +1757,8 @@ check_scsi_status:
case CS_INCOMPLETE:
case CS_PORT_UNAVAILABLE:
case CS_TIMEOUT:
case CS_RESET:
/*
* We are going to have the fc class block the rport
* while we try to recover so instruct the mid layer
@ -1781,10 +1783,6 @@ check_scsi_status:
qla2x00_mark_device_lost(fcport->vha, fcport, 1, 1);
break;
case CS_RESET:
cp->result = DID_TRANSPORT_DISRUPTED << 16;
break;
case CS_ABORTED:
cp->result = DID_RESET << 16;
break;