From: Saurav Kashyap <skashyap@marvell.com>
Date: Fri, 23 Aug 2019 02:52:40 -0700
Subject: scsi: qedf: Check for module unloading bit before processing link
update AEN
Patch-mainline: v5.4-rc1
Git-commit: 0482262646e4e9e089c4e75f336244c5eaf360e1
References: bsc#1149976
Prevent race where we're removing the module and we get link update
Signed-off-by: Saurav Kashyap <skashyap@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Acked-by: Lee Duncan <lduncan@suse.com>
---
drivers/scsi/qedf/qedf_main.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/drivers/scsi/qedf/qedf_main.c b/drivers/scsi/qedf/qedf_main.c
index 50b1fa8740da..ab9a932089ae 100644
--- a/drivers/scsi/qedf/qedf_main.c
+++ b/drivers/scsi/qedf/qedf_main.c
@@ -533,6 +533,16 @@ static void qedf_link_update(void *dev, struct qed_link_output *link)
{
struct qedf_ctx *qedf = (struct qedf_ctx *)dev;
+ /*
+ * Prevent race where we're removing the module and we get link update
+ * for qed.
+ */
+ if (test_bit(QEDF_UNLOADING, &qedf->flags)) {
+ QEDF_ERR(&qedf->dbg_ctx,
+ "Ignore link update, driver getting unload.\n");
+ return;
+ }
+
if (link->link_up) {
if (atomic_read(&qedf->link_state) == QEDF_LINK_UP) {
QEDF_INFO((&qedf->dbg_ctx), QEDF_LOG_DISC,