libata: prevent HSM state change race between ISR and PIO

[firefly-linux-kernel-4.4.55.git] / drivers / ata / libata-eh.c

diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index f9476fb3ac43b44596c1134fe8fea55bffdd5f71..370462fa8e01addd3387befee8f4ea78486b2cc0 100644 (file)
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -1,7 +1,7 @@
 /*
  *  libata-eh.c - libata error handling
  *
- *  Maintained by:  Jeff Garzik <jgarzik@pobox.com>
+ *  Maintained by:  Tejun Heo <tj@kernel.org>
  *                 Please ALWAYS copy linux-ide@vger.kernel.org
  *                 on emails.
  *
@@ -1322,14 +1322,14 @@ void ata_eh_qc_complete(struct ata_queued_cmd *qc)
  *     should be retried.  To be used from EH.
  *
  *     SCSI midlayer limits the number of retries to scmd->allowed.
- *     scmd->retries is decremented for commands which get retried
+ *     scmd->allowed is incremented for commands which get retried
  *     due to unrelated failures (qc->err_mask is zero).
  */
 void ata_eh_qc_retry(struct ata_queued_cmd *qc)
 {
        struct scsi_cmnd *scmd = qc->scsicmd;
-       if (!qc->err_mask && scmd->retries)
-               scmd->retries--;
+       if (!qc->err_mask)
+               scmd->allowed++;
        __ata_eh_qc_complete(qc);
 }