scsi: ufs: clear outstanding_request bit in case query timeout
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.
Reviewed-by: Subhash Jadavani <subhashj@codeaurora.org>
Reviewed-by: Gilad Broner <gbroner@codeaurora.org>
Reviewed-by: Dolev Raviv <draviv@codeaurora.org>
Signed-off-by: Yaniv Gardi <ygardi@codeaurora.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 8a34f61..4863e93 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -364,6 +364,16 @@
}
/**
+ * 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
*
@@ -1501,9 +1511,17 @@
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;
@@ -3941,7 +3959,7 @@
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);