USB: usb peripheral controller driver oops avoidance
I'm having problem with oopses when rebooting, if I modprobe g_serial
and rmmod g_serial and do a reboot I get an oops in device_shutdown().
The reason seems to be that usb_gadget_unregister_driver() doesn't do
enough cleanup. With this at91_udc patch I don't get the oops.
Signed-off-by: Patrik Sevallius <patrik.sevallius@enea.com>
[ Same bug was in other peripheral controller drivers; fixed ]
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/gadget/at91_udc.c b/drivers/usb/gadget/at91_udc.c
index cd62b02..4b6ed35 100644
--- a/drivers/usb/gadget/at91_udc.c
+++ b/drivers/usb/gadget/at91_udc.c
@@ -1616,6 +1616,8 @@
local_irq_enable();
driver->unbind(&udc->gadget);
+ udc->gadget.dev.driver = NULL;
+ udc->gadget.dev.driver_data = NULL;
udc->driver = NULL;
DBG("unbound from %s\n", driver->driver.name);