On 11/06/2014 10:11 PM, wenxiong@xxxxxxxxxxxxxxxxxx wrote: > This patch fixes an issue with multipath ipr SAS devices which require a > start unit command to be issued following an adapter reset. Without this > patch, paths get marked failed following an adapter reset and since the > error handler never gets invoked to issue the start unit, the paths are > never recovered. Returning FAILED for this case ensures the error > handler wakes up to issue the start unit. > > Signed-off-by: Brian King <brking@xxxxxxxxxxxxxxxxxx> > Teste-by: Wen Xiong <wenxiong@xxxxxxxxxxxxxxxxxx> > --- > drivers/scsi/device_handler/scsi_dh_alua.c | 7 +++++++ > 1 file changed, 7 insertions(+) > > Index: b/drivers/scsi/device_handler/scsi_dh_alua.c > =================================================================== > --- a/drivers/scsi/device_handler/scsi_dh_alua.c 2014-11-06 14:01:37.682079047 -0600 > +++ b/drivers/scsi/device_handler/scsi_dh_alua.c 2014-11-06 14:04:08.772079175 -0600 > @@ -474,6 +474,13 @@ static int alua_check_sense(struct scsi_ > * LUN Not Ready -- Offline > */ > return SUCCESS; > + if (sdev->allow_restart && > + sense_hdr->asc == 0x04 && sense_hdr->ascq == 0x02) > + /* > + * if the device is not started, we need to wake > + * the error handler to start the motor > + */ > + return FAILED; > break; > case UNIT_ATTENTION: > if (sense_hdr->asc == 0x29 && sense_hdr->ascq == 0x00) > Reviewed-by: Hannes Reinecke <hare@xxxxxxx> Cheers, Hannes -- Dr. Hannes Reinecke zSeries & Storage hare@xxxxxxx +49 911 74053 688 SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg GF: J. Hawn, J. Guild, F. Imendörffer, HRB 21284 (AG Nürnberg) -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
