Commit c2d95fcf authored by Douglas Anderson's avatar Douglas Anderson Committed by Greg Kroah-Hartman
Browse files

usb: core: Don't force USB generic_subclass drivers to define probe() 



There's no real reason that subclassed USB drivers _need_ to define
probe() since they might want to subclass for some other reason. Make
it optional to define probe() if we're a generic_subclass.

Signed-off-by: default avatarDouglas Anderson <dianders@chromium.org>
Reviewed-by: default avatarGrant Grundler <grundler@chromium.org>
Reviewed-by: default avatarAlan Stern <stern@rowland.harvard.edu>
Link: https://lore.kernel.org/r/20231201102946.v2.1.I7ea0dd55ee2acdb48b0e6d28c1a704ab2c29206f@changeid


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent dadc0f0f

drivers/usb/core/driver.c

+4 −1
Original line number Diff line number Diff line
@@ -290,7 +290,10 @@ static int usb_probe_device(struct device *dev) 
	 * specialised device drivers prior to setting the

	 * use_generic_driver bit.

	 */

	if (udriver->probe)

		error = udriver->probe(udev);

	else if (!udriver->generic_subclass)

		error = -EINVAL;

	if (error == -ENODEV && udriver != &usb_generic_driver &&

	    (udriver->id_table || udriver->match)) {

		udev->use_generic_driver = 1;