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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>
This commit is contained in:
Patrik Sevallius 2007-11-20 09:32:00 -08:00 committed by Greg Kroah-Hartman
parent 7b62cc8668
commit eb0be47dbb
6 changed files with 7 additions and 0 deletions
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1
drivers/usb/gadget/amd5536udc.c
View File

@ -2038,6 +2038,7 @@ int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
spin_unlock_irqrestore(&dev->lock, flags);
driver->unbind(&dev->gadget);
dev->gadget.dev.driver = NULL;
dev->driver = NULL;
/* set SD */

2
drivers/usb/gadget/at91_udc.c
View File

@ -1616,6 +1616,8 @@ int usb_gadget_unregister_driver (struct usb_gadget_driver *driver)
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);

1
drivers/usb/gadget/goku_udc.c
View File

@ -1422,6 +1422,7 @@ int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
spin_unlock_irqrestore(&dev->lock, flags);
driver->unbind(&dev->gadget);
dev->gadget.dev.driver = NULL;
DBG(dev, "unregistered driver '%s'\n", driver->driver.name);
return 0;

1
drivers/usb/gadget/lh7a40x_udc.c
View File

@ -474,6 +474,7 @@ int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
spin_unlock_irqrestore(&dev->lock, flags);
driver->unbind(&dev->gadget);
dev->gadget.dev.driver = NULL;
device_del(&dev->gadget.dev);
udc_disable(dev);

1
drivers/usb/gadget/m66592-udc.c
View File

@ -1508,6 +1508,7 @@ int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
m66592_bclr(m66592, M66592_VBSE | M66592_URST, M66592_INTENB0);
driver->unbind(&m66592->gadget);
m66592->gadget.dev.driver = NULL;
init_controller(m66592);
disable_controller(m66592);

1
drivers/usb/gadget/pxa2xx_udc.c
View File

@ -1345,6 +1345,7 @@ int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
local_irq_enable();
driver->unbind(&dev->gadget);
dev->gadget.dev.driver = NULL;
dev->driver = NULL;
device_del (&dev->gadget.dev);