Commit efe82a16 authored Jan 04, 2011 by Kashyap, Desai Committed by James Bottomley Jan 24, 2011

[SCSI] mpt2sas: fix internal device reset for older firmware prior to MPI Rev K



The "internal device reset complete" event is not supported
for older firmware prior to MPI Rev K We added
a check in the driver so the "internal device reset" event is
ignored for older firmware.  When ignored, the tm_busy flag doesn't
get set nor cleared.  Without this fix, IO queues would be froozen
indefinetly after the "internal device reset" event, as the "complete" event
never sent to clear the flag.

Signed-off-by: Kashyap Desai <kashyap.desai@lsi.com>
Cc: stable@kernel.org
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

parent 4dc2757a

drivers/scsi/mpt2sas/mpt2sas_scsih.c

+6 −0

Original line number	Original line	Diff line number	Diff line
	@@ -5002,6 +5002,12 @@ _scsih_sas_device_status_change_event(struct MPT2SAS_ADAPTER *ioc,
	event_data);		event_data);
	#endif		#endif

			/* In MPI Revision K (0xC), the internal device reset complete was
			* implemented, so avoid setting tm_busy flag for older firmware.
			*/
			if ((ioc->facts.HeaderVersion >> 8) < 0xC)
			return;

	if (event_data->ReasonCode !=		if (event_data->ReasonCode !=
	MPI2_EVENT_SAS_DEV_STAT_RC_INTERNAL_DEVICE_RESET &&		MPI2_EVENT_SAS_DEV_STAT_RC_INTERNAL_DEVICE_RESET &&
	event_data->ReasonCode !=		event_data->ReasonCode !=