2021-06-23 07:41:15

by Can Guo

Subject: [PATCH 05/10] scsi: ufs: Complete the cmd before returning in queuecommand

Commit 7a7e66c65d4148fc3f23b058405bc9f102414fcb ("scsi: ufs: Fix a race
condition between ufshcd_abort() and eh_work()") forgot to complete the
cmd, which takes an occupied lrb, before returning in queuecommand. This
change adds the missing codes.

Fixes: 7a7e66c65d414 ("scsi: ufs: Fix a race condition between ufshcd_abort() and eh_work()")
Signed-off-by: Can Guo <[email protected]>

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 5f837c4..7fbc63e 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -2758,6 +2758,16 @@ static int ufshcd_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd)
goto out;
}

+ if (unlikely(test_bit(tag, &hba->outstanding_reqs))) {
+ if (hba->wlu_pm_op_in_progress) {
+ set_host_byte(cmd, DID_BAD_TARGET);
+ cmd->scsi_done(cmd);
+ } else {
+ err = SCSI_MLQUEUE_HOST_BUSY;
+ }
+ goto out;
+ }
+
hba->req_abort_count = 0;

err = ufshcd_hold(hba, true);
@@ -2768,15 +2778,6 @@ static int ufshcd_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd)
WARN_ON(ufshcd_is_clkgating_allowed(hba) &&
(hba->clk_gating.state != CLKS_ON));

- if (unlikely(test_bit(tag, &hba->outstanding_reqs))) {
- if (hba->wlu_pm_op_in_progress)
- set_host_byte(cmd, DID_BAD_TARGET);
- else
- err = SCSI_MLQUEUE_HOST_BUSY;
- ufshcd_release(hba);
- goto out;
- }
-
lrbp = &hba->lrb[tag];
WARN_ON(lrbp->cmd);
lrbp->cmd = cmd;
--
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2021-06-23 07:41:38

by Can Guo

Subject: Re: [PATCH 05/10] scsi: ufs: Complete the cmd before returning in queuecommand

Sorry, please ignore this change, it is wrongly sent out along with this
series...

On 2021-06-23 15:35, Can Guo wrote:
> Commit 7a7e66c65d4148fc3f23b058405bc9f102414fcb ("scsi: ufs: Fix a race
> condition between ufshcd_abort() and eh_work()") forgot to complete the
> cmd, which takes an occupied lrb, before returning in queuecommand.
> This
> change adds the missing codes.
>
> Fixes: 7a7e66c65d414 ("scsi: ufs: Fix a race condition between
> ufshcd_abort() and eh_work()")
> Signed-off-by: Can Guo <[email protected]>
>
> diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
> index 5f837c4..7fbc63e 100644
> --- a/drivers/scsi/ufs/ufshcd.c
> +++ b/drivers/scsi/ufs/ufshcd.c
> @@ -2758,6 +2758,16 @@ static int ufshcd_queuecommand(struct Scsi_Host
> *host, struct scsi_cmnd *cmd)
> goto out;
> }
>
> + if (unlikely(test_bit(tag, &hba->outstanding_reqs))) {
> + if (hba->wlu_pm_op_in_progress) {
> + set_host_byte(cmd, DID_BAD_TARGET);
> + cmd->scsi_done(cmd);
> + } else {
> + err = SCSI_MLQUEUE_HOST_BUSY;
> + }
> + goto out;
> + }
> +
> hba->req_abort_count = 0;
>
> err = ufshcd_hold(hba, true);
> @@ -2768,15 +2778,6 @@ static int ufshcd_queuecommand(struct Scsi_Host
> *host, struct scsi_cmnd *cmd)
> WARN_ON(ufshcd_is_clkgating_allowed(hba) &&
> (hba->clk_gating.state != CLKS_ON));
>
> - if (unlikely(test_bit(tag, &hba->outstanding_reqs))) {
> - if (hba->wlu_pm_op_in_progress)
> - set_host_byte(cmd, DID_BAD_TARGET);
> - else
> - err = SCSI_MLQUEUE_HOST_BUSY;
> - ufshcd_release(hba);
> - goto out;
> - }
> -
> lrbp = &hba->lrb[tag];
> WARN_ON(lrbp->cmd);
> lrbp->cmd = cmd;