scsi: qedf: Check for module unloading bit before processing link update AEN

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>

1 files changed, 10 insertions, 0 deletions

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,