On Fri, Feb 17, 2017 at 09:23:06AM +0100, Hannes Reinecke wrote:
> When attempting a command abort we should check the command status
> prior to sending the abort; the command might've been completed
> already.
> 
> Signed-off-by: Hannes Reinecke <[email protected]>
> ---
>  drivers/scsi/mpt3sas/mpt3sas_scsih.c | 9 ++++++---
>  1 file changed, 6 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/scsi/mpt3sas/mpt3sas_scsih.c 
> b/drivers/scsi/mpt3sas/mpt3sas_scsih.c
> index a88f2ac..989cdc8 100644
> --- a/drivers/scsi/mpt3sas/mpt3sas_scsih.c
> +++ b/drivers/scsi/mpt3sas/mpt3sas_scsih.c
> @@ -2261,6 +2261,12 @@ struct _sas_node *
>               return (!rc) ? SUCCESS : FAILED;
>       }
>  
> +     if (type == MPI2_SCSITASKMGMT_TASKTYPE_ABORT_TASK) {
> +             scsi_lookup = mpt3sas_get_st_from_smid(ioc, smid_task);
> +             if (scsi_lookup->cb_idx == 0xFF)
> +                     return SUCCESS;
> +     }

Not really new in this patch, but I'm worried that we don't check for
a NULL return here.  Are we 100% sure no invalid smid can be passed in?

But the patch itself looks fine:

Reviewed-by: Christoph Hellwig <[email protected]>

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