From: Quinn Tran <quinn.tran@xxxxxxxxxx> 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@xxxxxxxxxx> Signed-off-by: Himanshu Madhani <himanshu.madhani@xxxxxxxxxx> --- Hi Martin, This patch fixes the crash for HBA reset test. From core dump analysis, memory corruption was discoverd during session cleanup. To prevent this memory corruption, driver needs to wait for session to be deleted and all memory associated with the session released before it can relogin and create new session. Please apply this patch to 4.16/scsi-queue at your earliest convenience. Thanks, Himanshu --- 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 12ee6e02d146..afcb5567998a 100644 --- a/drivers/scsi/qla2xxx/qla_os.c +++ b/drivers/scsi/qla2xxx/qla_os.c @@ -3625,6 +3625,8 @@ 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. -- 2.12.0
