Patch "scsi: cxlflash: Reset command ioasc" has been added to the 4.15-stable tree

This is a note to let you know that I've just added the patch titled

scsi: cxlflash: Reset command ioasc

to the 4.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
scsi-cxlflash-reset-command-ioasc.patch
and it can be found in the queue-4.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Uma Krishnan <[email protected]>
Date: Wed, 3 Jan 2018 16:54:02 -0600
Subject: scsi: cxlflash: Reset command ioasc

From: Uma Krishnan <[email protected]>

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]

---
 drivers/scsi/cxlflash/main.c |    1 +
 1 file changed, 1 insertion(+)

@@ -620,6 +620,7 @@ static int cxlflash_queuecommand(struct
 	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);

Patches currently in stable-queue which might be from [email protected] are

queue-4.15/scsi-cxlflash-reset-command-ioasc.patch