This patch zeroes some variables when usb_gadget_register_driver()
fails. gadgetfs does a dummy registration to get the name of the USB
driver and then waits for user-land driver. If someone plugs the cable
in the meantime, bad things happen, because at91_udc has been left in
inconsistent state.
Signed-off-by: Wojtek Kaniewski <[EMAIL PROTECTED]>
Cc: Andrew Victor <[EMAIL PROTECTED]>
--- linux-2.6.19.orig/drivers/usb/gadget/at91_udc.c 2006-12-08
09:36:02.000000000 +0100
+++ linux-2.6.19/drivers/usb/gadget/at91_udc.c 2006-12-08 11:35:17.000000000
+0100
@@ -1595,6 +1601,10 @@ int usb_gadget_register_driver (struct u
if (retval) {
DBG("driver->bind() returned %d\n", retval);
udc->driver = NULL;
+ udc->gadget.dev.driver = NULL;
+ udc->gadget.dev.driver_data = NULL;
+ udc->enabled = 0;
+ udc->selfpowered = 0;
return retval;
}
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