ACK: [PATCH][SRU Zesty] scsi: hisi_sas: fix timeout check in hisi_sas_internal_task_abort()
Stefan Bader
stefan.bader at canonical.com
Tue Aug 8 09:49:06 UTC 2017
On 04.08.2017 21:19, dann frazier wrote:
> From: Xiang Chen <chenxiang66 at hisilicon.com>
>
> BugLink: https://bugs.launchpad.net/bugs/1708730
>
> We need to check for timeout before task status, or the task will be
> mistook as completed internal abort command. Also add protection for
> sas_task.task_state_flags in hisi_sas_tmf_timedout().
>
> Signed-off-by: Xiang Chen <chenxiang66 at hisilicon.com>
> Signed-off-by: John Garry <john.garry at huawei.com>
> Signed-off-by: Martin K. Petersen <martin.petersen at oracle.com>
> (cherry picked from commit f64a6988268aae866bb6ce6edb910d454ccef331)
> Signed-off-by: dann frazier <dann.frazier at canonical.com>
Acked-by: Stefan Bader <stefan.bader at canonical.com>
> ---
> drivers/scsi/hisi_sas/hisi_sas_main.c | 25 +++++++++++++++++--------
> 1 file changed, 17 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/scsi/hisi_sas/hisi_sas_main.c b/drivers/scsi/hisi_sas/hisi_sas_main.c
> index 938a22f12868..60592a4b65a2 100644
> --- a/drivers/scsi/hisi_sas/hisi_sas_main.c
> +++ b/drivers/scsi/hisi_sas/hisi_sas_main.c
> @@ -691,8 +691,13 @@ static void hisi_sas_task_done(struct sas_task *task)
> static void hisi_sas_tmf_timedout(unsigned long data)
> {
> struct sas_task *task = (struct sas_task *)data;
> + unsigned long flags;
> +
> + spin_lock_irqsave(&task->task_state_lock, flags);
> + if (!(task->task_state_flags & SAS_TASK_STATE_DONE))
> + task->task_state_flags |= SAS_TASK_STATE_ABORTED;
> + spin_unlock_irqrestore(&task->task_state_lock, flags);
>
> - task->task_state_flags |= SAS_TASK_STATE_ABORTED;
> complete(&task->slow_task->completion);
> }
>
> @@ -1247,6 +1252,17 @@ hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
> wait_for_completion(&task->slow_task->completion);
> res = TMF_RESP_FUNC_FAILED;
>
> + /* Internal abort timed out */
> + if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
> + if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
> + struct hisi_sas_slot *slot = task->lldd_task;
> +
> + if (slot)
> + slot->task = NULL;
> + dev_err(dev, "internal task abort: timeout.\n");
> + }
> + }
> +
> if (task->task_status.resp == SAS_TASK_COMPLETE &&
> task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
> res = TMF_RESP_FUNC_COMPLETE;
> @@ -1259,13 +1275,6 @@ hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
> goto exit;
> }
>
> - /* Internal abort timed out */
> - if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
> - if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
> - dev_err(dev, "internal task abort: timeout.\n");
> - }
> - }
> -
> exit:
> dev_dbg(dev, "internal task abort: task to dev %016llx task=%p "
> "resp: 0x%x sts 0x%x\n",
>
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