[Bionic][PATCH 1/1] scsi: qla2xxx: Fix memory corruption during hba reset test

[Joseph Salisbury]

From: Quinn Tran <quinn.tran at cavium.com>

BugLink: http://bugs.launchpad.net/bugs/1750441

This patch fixes memory corrpution while performing HBA Reset test.

Following stack trace is seen:

[  466.397219] BUG: unable to handle kernel NULL pointer dereference at 0000000000000020
[  466.433669] IP: [<ffffffffc06f5dd0>] qlt_free_session_done+0x260/0x5f0 [qla2xxx]
[  466.467731] PGD 0
[  466.476718] Oops: 0000 [#1] SMP

Signed-off-by: Quinn Tran <quinn.tran at cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani at cavium.com>
Reviewed-by: Johannes Thumshirn <jthumshirn at suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen at oracle.com>
(cherry picked from commit 2ce87cc5b269510de9ca1185ca8a6e10ec78c069)
Signed-off-by: Joseph Salisbury <joseph.salisbury at canonical.com>
---
 drivers/scsi/qla2xxx/qla_os.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index 46f2d0c..f4a3982 100644
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -3595,6 +3595,8 @@ qla2x00_remove_one(struct pci_dev *pdev)
 	}
 	qla2x00_wait_for_hba_ready(base_vha);
 
+	qla2x00_wait_for_sess_deletion(base_vha);
+
 	/*
 	 * if UNLOAD flag is already set, then continue unload,
 	 * where it was set first.
-- 
2.7.4