usb: gadget: audio: queue wLength-sized requests

On Audio class, the wLength field of the Setup
packet, contains the data payload size of the
following Data phase. Instead of harcoding values,
use wLength.

This also fixes a bug where Gadget driver had to
receive 3 bytes, but it was queueing a ZLP.

Signed-off-by: Felipe Balbi <balbi@ti.com>

diff --git a/drivers/usb/gadget/f_audio.c b/drivers/usb/gadget/f_audio.c
index fd5507f3cee672d425f41310839ccb8ab32fd4fb..979f92caef844b1102ceab6e468bbe9814bdfab4 100644 (file)
--- a/drivers/usb/gadget/f_audio.c
+++ b/drivers/usb/gadget/f_audio.c
@@ -461,7 +461,7 @@ static int audio_set_endpoint_req(struct usb_function *f,
 
        switch (ctrl->bRequest) {
        case UAC_SET_CUR:
-               value = 0;
+               value = len;
                break;
 
        case UAC_SET_MIN:
@@ -500,7 +500,7 @@ static int audio_get_endpoint_req(struct usb_function *f,
        case UAC_GET_MIN:
        case UAC_GET_MAX:
        case UAC_GET_RES:
-               value = 3;
+               value = len;
                break;
        case UAC_GET_MEM:
                break;