Commit 4ccd0644 authored Dec 01, 2015 by Felipe F. Tonello Committed by Greg Kroah-Hartman Aug 25, 2019

usb: gadget: f_midi: fail if set_alt fails to allocate requests



commit f0f1b8cac4d8d973e95f25d9ea132775fb43c5f4 upstream.

This ensures that the midi function will only work if the proper number of
IN and OUT requrests are allocated. Otherwise the function will work with less
requests then what the user wants.

Signed-off-by: Felipe F. Tonello <eu@felipetonello.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
From: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 52a95925

drivers/usb/gadget/function/f_midi.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -364,9 +364,10 @@ static int f_midi_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
		req->complete = f_midi_complete;
		err = usb_ep_queue(midi->out_ep, req, GFP_ATOMIC);
		if (err) {
		ERROR(midi, "%s queue req: %d\n",
		ERROR(midi, "%s: couldn't enqueue request: %d\n",
		midi->out_ep->name, err);
		free_ep_req(midi->out_ep, req);
		return err;
		}
		}