[media] em28xx: prefer_bulk parameter is read-only
As the bulk mode is set at device's probe, it is not possible
to change it later. So, change the parameter to be read only
after modprobing.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/usb/em28xx/em28xx-cards.c b/drivers/media/usb/em28xx/em28xx-cards.c
index bc63b1c..2129560 100644
--- a/drivers/media/usb/em28xx/em28xx-cards.c
+++ b/drivers/media/usb/em28xx/em28xx-cards.c
@@ -62,7 +62,7 @@
MODULE_PARM_DESC(card, "card type");
static unsigned int prefer_bulk;
-module_param(prefer_bulk, int, 0644);
+module_param(prefer_bulk, int, 0444);
MODULE_PARM_DESC(prefer_bulk, "prefer USB bulk transfers");