From 1dbdcf117b227eb966691818e850a2fde589f2a2 Mon Sep 17 00:00:00 2001 From: Uma Krishnan Date: Wed, 3 Jan 2018 16:54:02 -0600 Subject: [PATCH] scsi: cxlflash: Reset command ioasc commit 96cf727fe8f102bf92150b741db71ee39fb8c521 upstream. In the event of a command failure, cxlflash returns the failure to the upper layers to process. After processing the error, when the command is queued again, the private command structure will not be zeroed and the ioasc could be stale. Per the SISLite specification, the AFU only sets the ioasc in the presence of a failure. Thus, even though the original command succeeds the second time, the command is considered a failure due to stale ioasc. This cycle repeats indefinitely and can cause a hang or IO failure. To fix the issue, clear the ioasc before queuing any command. [mkp: added Cc: stable per request] Fixes: 479ad8e9d48c ("scsi: cxlflash: Remove zeroing of private command data") Signed-off-by: Uma Krishnan Acked-by: Matthew R. Ochs Signed-off-by: Martin K. Petersen Signed-off-by: Greg Kroah-Hartman --- drivers/scsi/cxlflash/main.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/scsi/cxlflash/main.c b/drivers/scsi/cxlflash/main.c index 76b8b7ee..0b64672 100644 --- a/drivers/scsi/cxlflash/main.c +++ b/drivers/scsi/cxlflash/main.c @@ -620,6 +620,7 @@ static int cxlflash_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *scp) cmd->parent = afu; cmd->hwq_index = hwq_index; + cmd->sa.ioasc = 0; cmd->rcb.ctx_id = hwq->ctx_hndl; cmd->rcb.msi = SISL_MSI_RRQ_UPDATED; cmd->rcb.port_sel = CHAN2PORTMASK(scp->device->channel); -- 2.7.4