Commit ed773e66 authored Mar 29, 2007 by Brian King Committed by James Bottomley Apr 17, 2007

[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>

parent 18a6598f

drivers/scsi/scsi_error.c

+5 −3

Original line number	Diff line number	Diff line
		@@ -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);

		if (rtn == SUCCESS)
		return 0;
		}