qla2xxx: Honor FCP_RSP retry delay timer field.
Parse the retry delay timer field from the FCP response data and if:
- It is not zero
- The SCSI status is busy or queue full
return SCSI_MLQUEUE_TARGET_BUSY for the number of milliseconds specified
in the retry delay timer field.
Signed-off-by: Chad Dupuis <chad.dupuis@qlogic.com>
Signed-off-by: Saurav Kashyap <saurav.kashyap@qlogic.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index e742890..daabf8c 100644
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -731,6 +731,15 @@
goto qc24_target_busy;
}
+ /*
+ * Return target busy if we've received a non-zero retry_delay_timer
+ * in a FCP_RSP.
+ */
+ if (time_after(jiffies, fcport->retry_delay_timestamp))
+ fcport->retry_delay_timestamp = 0;
+ else
+ goto qc24_target_busy;
+
sp = qla2x00_get_sp(vha, fcport, GFP_ATOMIC);
if (!sp)
goto qc24_host_busy;