USB_ENDPOINT_SYNC_NONE 461 sound/usb/pcm.c if (is_playback && attr == USB_ENDPOINT_SYNC_NONE) USB_ENDPOINT_SYNC_NONE 474 sound/usb/pcm.c if (is_playback && attr == USB_ENDPOINT_SYNC_NONE) USB_ENDPOINT_SYNC_NONE 488 sound/usb/pcm.c if (is_playback && attr == USB_ENDPOINT_SYNC_NONE)