usb: gadget: aspeed: Check suspend/resume callback existence

.. before calling them Signed-off-by: Benjamin Herrenschmidt <[email protected]> Signed-off-by: Felipe Balbi <[email protected]>
akvadrako · Aug 12, 2019 · 155940a · 155940a
1 parent ef9d346
commit 155940a
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/drivers/usb/gadget/udc/aspeed-vhub/dev.c b/drivers/usb/gadget/udc/aspeed-vhub/dev.c
@@ -458,7 +458,7 @@ static const struct usb_gadget_ops ast_vhub_udc_ops = {
 void ast_vhub_dev_suspend(struct ast_vhub_dev *d)
 {
 	d->suspended = true;
-	if (d->driver) {
+	if (d->driver && d->driver->suspend) {
 		spin_unlock(&d->vhub->lock);
 		d->driver->suspend(&d->gadget);
 		spin_lock(&d->vhub->lock);
@@ -468,7 +468,7 @@ void ast_vhub_dev_suspend(struct ast_vhub_dev *d)
 void ast_vhub_dev_resume(struct ast_vhub_dev *d)
 {
 	d->suspended = false;
-	if (d->driver) {
+	if (d->driver && d->driver->resume) {
 		spin_unlock(&d->vhub->lock);
 		d->driver->resume(&d->gadget);
 		spin_lock(&d->vhub->lock);