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| author | Brian King <brking@linux.vnet.ibm.com> | 2007-03-29 15:25:52 -0500 |
|---|---|---|
| committer | James Bottomley <jejb@mulgrave.il.steeleye.com> | 2007-04-17 17:55:36 -0400 |
| commit | ed773e66480fdcd06732eb2aa39362599dcd67fa (patch) | |
| tree | 53b0a88ea4557efaea19e83701437b11e2dee1ff /drivers/scsi | |
| parent | 18a6598f2d3bb7275dadba77df5f06bc996a77d4 (diff) | |
| download | linux-3.10-ed773e66480fdcd06732eb2aa39362599dcd67fa.tar.gz linux-3.10-ed773e66480fdcd06732eb2aa39362599dcd67fa.tar.bz2 linux-3.10-ed773e66480fdcd06732eb2aa39362599dcd67fa.zip | |
[SCSI] scsi_error.c: Add EH Start Unit retry
Currently, the scsi error handler will issue a START_UNIT
command if the drive indicates it needs its motor started
and the allow_restart flag is set in the scsi_device. If,
after the scsi error handler invokes a host adapter reset
due to error recovery, a device is in a unit attention
state AND also needs a START_UNIT, that device will be placed
offline. The disk array devices on an ipr RAID adapter
will do exactly this when in a dual initiator configuration.
This patch adds a single retry to the EH initiated
START_UNIT.
Signed-off-by: Brian King <brking@linux.vnet.ibm.com>
Patch modified and
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'drivers/scsi')
| -rw-r--r-- | drivers/scsi/scsi_error.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c index 7a1a1bb1341..28a266c804b 100644 --- a/drivers/scsi/scsi_error.c +++ b/drivers/scsi/scsi_error.c @@ -932,10 +932,12 @@ static int scsi_eh_try_stu(struct scsi_cmnd *scmd) static unsigned char stu_command[6] = {START_STOP, 0, 0, 0, 1, 0}; if (scmd->device->allow_restart) { - int rtn; + int i, rtn = NEEDS_RETRY; + + for (i = 0; rtn == NEEDS_RETRY && i < 2; i++) + rtn = scsi_send_eh_cmnd(scmd, stu_command, 6, + START_UNIT_TIMEOUT, 0); - rtn = scsi_send_eh_cmnd(scmd, stu_command, 6, - START_UNIT_TIMEOUT, 0); if (rtn == SUCCESS) return 0; } |