Fix driver crash during back-to-back ramp events.
Signed-off-by: Alex Iannicelli <alex.iannicelli@xxxxxxxxxx>
Signed-off-by: James Smart <james.smart@xxxxxxxxxx>
---
lpfc_scsi.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff -upNr a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c
--- a/drivers/scsi/lpfc/lpfc_scsi.c 2012-05-07 10:01:16.000000000 -0400
+++ b/drivers/scsi/lpfc/lpfc_scsi.c 2012-05-07 10:01:18.000000000 -0400
@@ -399,6 +399,14 @@ lpfc_ramp_down_queue_handler(struct lpfc
num_rsrc_err = atomic_read(&phba->num_rsrc_err);
num_cmd_success = atomic_read(&phba->num_cmd_success);
+ /*
+ * The error and success command counters are global per
+ * driver instance. If another handler has already
+ * operated on this error event, just exit.
+ */
+ if (num_rsrc_err == 0)
+ return;
+
vports = lpfc_create_vport_work_array(phba);
if (vports != NULL)
for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
--
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