Messages in this thread Patch in this message | | | From | "Felipe F. Tonello" <> | Subject | [PATCH v5 6/7] usb: gadget: f_midi: set altsettings only for MIDIStreaming interface | Date | Tue, 10 Nov 2015 17:52:08 +0000 |
| |
This avoids duplication of USB requests for OUT endpoint and re-enabling endpoints.
Signed-off-by: Felipe F. Tonello <eu@felipetonello.com> --- drivers/usb/gadget/function/f_midi.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/gadget/function/f_midi.c b/drivers/usb/gadget/function/f_midi.c index 76ea53c..615d632 100644 --- a/drivers/usb/gadget/function/f_midi.c +++ b/drivers/usb/gadget/function/f_midi.c @@ -75,6 +75,7 @@ struct f_midi { struct usb_ep *in_ep, *out_ep; struct snd_card *card; struct snd_rawmidi *rmidi; + u8 ms_id; struct snd_rawmidi_substream *in_substream[MAX_PORTS]; struct snd_rawmidi_substream *out_substream[MAX_PORTS]; @@ -322,7 +323,7 @@ static int f_midi_set_alt(struct usb_function *f, unsigned intf, unsigned alt) int err; /* For Control Device interface we do nothing */ - if (intf == 0) + if (intf != midi->ms_id) return 0; err = f_midi_start_ep(midi, f, midi->in_ep); @@ -730,6 +731,7 @@ static int f_midi_bind(struct usb_configuration *c, struct usb_function *f) goto fail; ms_interface_desc.bInterfaceNumber = status; ac_header_desc.baInterfaceNr[0] = status; + midi->ms_id = status; status = -ENODEV; -- 2.5.0
| |