scsi: qla2xxx: stop timer in shutdown path

In shutdown/reboot paths, the timer is not stopped:

  qla2x00_shutdown
  pci_device_shutdown
  device_shutdown
  kernel_restart_prepare
  kernel_restart
  sys_reboot

This causes lockups (on powerpc) when firmware config space access calls
are interrupted by smp_send_stop later in reboot.

Fixes: e30d1756480dc ("[SCSI] qla2xxx: Addition of shutdown callback handler.")
Link: https://lore.kernel.org/r/20191024063804.14538-1-npiggin@gmail.com
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Acked-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index e4d765fc03ea..39f7782a133b 100644
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -3529,6 +3529,10 @@ qla2x00_shutdown(struct pci_dev *pdev)
                 qla2x00_try_to_stop_firmware(vha);
         }
 
+        /* Disable timer */
+        if (vha->timer_active)
+                qla2x00_stop_timer(vha);
+
         /* Turn adapter off line */
         vha->flags.online = 0;