ACK / APPLIED[artful]: [PATCH][Unstable][Artful][SRU Zesty] scsi: hisi_sas: add null check before indirect pointer dereference

[Seth Forshee]

On Fri, Aug 04, 2017 at 12:40:58PM -0600, dann frazier wrote:
> From: "Gustavo A. R. Silva" <garsilva at embeddedor.com>
> 
> BugLink: https://bugs.launchpad.net/bugs/1708714
> 
> Add null check before indirectly dereferencing pointer task->lldd_task
> in statement u32 tag = slot->idx;
> 
> Addresses-Coverity-ID: 1373843
> Signed-off-by: Gustavo A. R. Silva <garsilva at embeddedor.com>
> Reviewed-by: John Garry <john.garry at huawei.com>
> Signed-off-by: Martin K. Petersen <martin.petersen at oracle.com>
> (cherry picked from commit eb045e046d5b2aab7710f82c2e5fb1403c69332b)
> Signed-off-by: dann frazier <dann.frazier at canonical.com>

Clean cherry pick, scope limited to platform-specific drive.

Acked-by: Seth Forshee <seth.forshee at canonical.com>

Applied to artful/master-next, and unstable/master, thanks.