diff options
| author | Felipe F. Tonello <eu@felipetonello.com> | 2015-12-01 21:31:00 +0300 |
|---|---|---|
| committer | Felipe Balbi <balbi@ti.com> | 2015-12-16 19:07:29 +0300 |
| commit | 919de443c2acd9fbd691ea0ed7d1ad858e5f8bed (patch) | |
| tree | 819ca15f04937e679016c22ba4a090411be53666 /drivers/usb/gadget/function/f_midi.c | |
| parent | 03e43528ab68449921201744a731c1bac50bc9d1 (diff) | |
| download | linux-919de443c2acd9fbd691ea0ed7d1ad858e5f8bed.tar.xz | |
usb: gadget: f_midi: set altsettings only for MIDIStreaming interface
This avoids duplication of USB requests for OUT endpoint and
re-enabling endpoints.
Signed-off-by: Felipe F. Tonello <eu@felipetonello.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'drivers/usb/gadget/function/f_midi.c')
| -rw-r--r-- | drivers/usb/gadget/function/f_midi.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/usb/gadget/function/f_midi.c b/drivers/usb/gadget/function/f_midi.c index 29bfca1a47bb..e804231bd8e5 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]; @@ -321,8 +322,8 @@ 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) + /* we only set alt for MIDIStreaming interface */ + 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; |