On Wed, Jul 08 2015, Robert Baldyga wrote:
> Function midi registers two interfaces with single set_alt() function
> which means that f_midi_set_alt() is called twice when configuration
> is set. That means that endpoint initialization and ep request allocation
> is done two times. To avoid this problem we do such things only once,
> for interface number 1 (MIDI Streaming interface).
>
> Signed-off-by: Robert Baldyga
Acked-by: Michal Nazarewicz
> ---
> drivers/usb/gadget/function/f_midi.c | 4
> 1 file changed, 4 insertions(+)
>
> diff --git a/drivers/usb/gadget/function/f_midi.c
> b/drivers/usb/gadget/function/f_midi.c
> index 6316aa5..4cef222 100644
> --- a/drivers/usb/gadget/function/f_midi.c
> +++ b/drivers/usb/gadget/function/f_midi.c
> @@ -329,6 +329,10 @@ static int f_midi_set_alt(struct usb_function *f,
> unsigned intf, unsigned alt)
> unsigned i;
> int err;
>
> + /* For Control Device interface we do nothing */
> + if (intf == 0)
> + return 0;
> +
> err = f_midi_start_ep(midi, f, midi->in_ep);
> if (err)
> return err;
> --
> 1.9.1
>
--
Best regards, _ _
.o. | Liege of Serenely Enlightened Majesty of o' \,=./ `o
..o | Computer Science, Michał “mina86” Nazarewicz(o o)
ooo +--ooO--(_)--Ooo--
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