[SCSI] qla2xxx: Avoid null pointer dereference in shutdown routine.

Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Signed-off-by: Saurav Kashyap <saurav.kashyap@qlogic.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index 0612d25..9e3ae1d 100644 (file)
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -2808,6 +2808,9 @@ qla2x00_shutdown(struct pci_dev *pdev)
        scsi_qla_host_t *vha;
        struct qla_hw_data  *ha;
 
+       if (!atomic_read(&pdev->enable_cnt))
+               return;
+
        vha = pci_get_drvdata(pdev);
        ha = vha->hw;