Reviewed-by: Gilad Broner <gbroner@xxxxxxxxxxxxxx>
> When sending a query to the device returns with a timeout error,
> we clear the corresponding bit in the DOORBELL register but
> we don't clear the outstanding_request field as we should.
> This patch fixes this bug.
>
> Signed-off-by: Yaniv Gardi <ygardi@xxxxxxxxxxxxxx>
>
> ---
> drivers/scsi/ufs/ufshcd.c | 22 ++++++++++++++++++++--
> 1 file changed, 20 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
> index 8860a57..e0b8755 100644
> --- a/drivers/scsi/ufs/ufshcd.c
> +++ b/drivers/scsi/ufs/ufshcd.c
> @@ -364,6 +364,16 @@ static inline void ufshcd_utrl_clear(struct ufs_hba
> *hba, u32 pos)
> }
>
> /**
> + * ufshcd_outstanding_req_clear - Clear a bit in outstanding request
> field
> + * @hba: per adapter instance
> + * @tag: position of the bit to be cleared
> + */
> +static inline void ufshcd_outstanding_req_clear(struct ufs_hba *hba, int
> tag)
> +{
> + __clear_bit(tag, &hba->outstanding_reqs);
> +}
> +
> +/**
> * ufshcd_get_lists_status - Check UCRDY, UTRLRDY and UTMRLRDY
> * @reg: Register value of host controller status
> *
> @@ -1502,9 +1512,17 @@ static int ufshcd_wait_for_dev_cmd(struct ufs_hba
> *hba,
>
> if (!time_left) {
> err = -ETIMEDOUT;
> + dev_dbg(hba->dev, "%s: dev_cmd request timedout, tag %d\n",
> + __func__, lrbp->task_tag);
> if (!ufshcd_clear_cmd(hba, lrbp->task_tag))
> - /* sucessfully cleared the command, retry if needed */
> + /* successfully cleared the command, retry if needed */
> err = -EAGAIN;
> + /*
> + * in case of an error, after clearing the doorbell,
> + * we also need to clear the outstanding_request
> + * field in hba
> + */
> + ufshcd_outstanding_req_clear(hba, lrbp->task_tag);
> }
>
> return err;
> @@ -3942,7 +3960,7 @@ static int ufshcd_abort(struct scsi_cmnd *cmd)
> scsi_dma_unmap(cmd);
>
> spin_lock_irqsave(host->host_lock, flags);
> - __clear_bit(tag, &hba->outstanding_reqs);
> + ufshcd_outstanding_req_clear(hba, tag);
> hba->lrb[tag].cmd = NULL;
> spin_unlock_irqrestore(host->host_lock, flags);
>
> --
> 1.8.5.2
>
> --
> QUALCOMM ISRAEL, on behalf of Qualcomm Innovation Center, Inc. is a member
> of Code Aurora Forum, hosted by The Linux Foundation
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