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Commit e4abe665 authored by Dave Young's avatar Dave Young Committed by Greg Kroah-Hartman
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usb-serial: fix usb_serial_register bug when boot with nousb param 



With "nousb" cmdline booting, built-in serial drivers (ie. airecable)
will trigger kernel oops.

Indeed, if nousb, usb_serial_init will failed, and the usb serial bus type
will not be registerd, then usb_serial_register call driver_register
which try to register the driver to a not registered bus.

Here add usb_disabled() check in usb_serial_register to fix it.

Signed-off-by: default avatarDave Young <hidave.darkstar@gmail.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent d0626808

drivers/usb/serial/usb-serial.c

+3 −0
Original line number Diff line number Diff line
@@ -1241,6 +1241,9 @@ int usb_serial_register(struct usb_serial_driver *driver) 
	/* must be called with BKL held */

	int retval;



	if (usb_disabled())

		return -ENODEV;



	fixup_generic(driver);



	if (!driver->description)