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) -- -- 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
