[PATCH v4 5/7] usb: gadget: f_midi: set altsettings only for MIDIStreaming interface

[Felipe F. Tonello]

This avoids duplication of USB requests for OUT endpoint and
re-enabling endpoints.

Signed-off-by: Felipe F. Tonello <eu@xxxxxxxxxxxxxxxxx>
---
 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 0e9cdeb..a617df3 100644
--- a/drivers/usb/gadget/function/f_midi.c
+++ b/drivers/usb/gadget/function/f_midi.c
@@ -323,6 +323,10 @@ static int f_midi_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
 	unsigned i;
 	int err;
 
+	/* We don't care if it is not MIDIStreaming interface */
+	if (intf != ms_interface_desc.bInterfaceNumber)
+		return 0;
+
 	err = f_midi_start_ep(midi, f, midi->in_ep);
 	if (err)
 		return err;
-- 
2.1.4

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/