[PATCH 08/11] scsi: ufs: Improve SCSI abort handling further

Bart Van Assche
2021-11-10T00:45:39Z

Make sure that aborted commands are completed once by clearing the
corresponding tag bit from hba->outstanding_reqs. This patch is a
follow-up for commit cd892096c940 ("scsi: ufs: core: Improve SCSI
abort handling").

Fixes: 7a3e97b0dc4b ("[SCSI] ufshcd: UFS Host controller driver")
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
---
drivers/scsi/ufs/ufshcd.c | 9 +++++++++
1 file changed, 9 insertions(+)

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 8f5640647054..1e15ed1f639f 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -7090,6 +7090,15 @@ static int ufshcd_abort(struct scsi_cmnd *cmd)
goto release;
}

+ /*
+ * ufshcd_try_to_abort_task() cleared the 'tag' bit in the doorbell
+ * register. Clear the corresponding bit from outstanding_reqs to
+ * prevent early completion.
+ */
+ spin_lock_irqsave(&hba->outstanding_lock, flags);
+ __clear_bit(tag, &hba->outstanding_reqs);
+ spin_unlock_irqrestore(&hba->outstanding_lock, flags);
+
lrbp->cmd = NULL;
err = SUCCESS;