[PATCH 1/6] cxlflash: Reset command ioasc

[Matthew R. Ochs]

On Wed, Jan 03, 2018 at 04:54:02PM -0600, Uma Krishnan wrote:
> 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.
> 
> Fixes: 479ad8e9d48c ("scsi: cxlflash: Remove zeroing of private command
> data")
> Signed-off-by: Uma Krishnan <ukrishn at linux.vnet.ibm.com>

Acked-by: Matthew R. Ochs <mrochs at linux.vnet.ibm.com>