Takashi Iwai e901b98738 usb: core: Add a helper function to check the validity of EP type in URB
This patch adds a new helper function to perform a sanity check of the
given URB to see whether it contains a valid endpoint.  It's a light-
weight version of what usb_submit_urb() does, but without the kernel
warning followed by the stack trace, just returns an error code.

Especially for a driver that doesn't parse the descriptor but fills
the URB with the fixed endpoint (e.g. some quirks for non-compliant
devices), this kind of check is preferable at the probe phase before
actually submitting the urb.

Tested-by: Andrey Konovalov <andreyknvl@google.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-10-11 15:14:32 +02:00
..
2017-09-25 10:57:13 +02:00
2016-11-18 16:02:15 +01:00
2017-08-14 14:50:58 -07:00
2017-04-11 14:41:29 -06:00