ALSA: usb-audio: Fix parameter block size for UAC2 control requests
USB Audio Class version 2.0 supports three different parameter block sizes for
CUR requests, which are 1 byte (5.2.3.1 Layout 1 Parameter Block), 2 bytes
(5.2.3.2 Layout 2 Parameter Block) and 4 bytes (5.2.3.3 Layout 3 Parameter
Block). Use the correct size according to the specific control as it was
already done for UACv1. The allocated block size for control requests is
increased to support the 4 byte worst case.
Signed-off-by: Julian Scheel <julian@jusst.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/usb/mixer.h b/sound/usb/mixer.h
index d3268f0..3417ef3 100644
--- a/sound/usb/mixer.h
+++ b/sound/usb/mixer.h
@@ -33,6 +33,8 @@
USB_MIXER_U8,
USB_MIXER_S16,
USB_MIXER_U16,
+ USB_MIXER_S32,
+ USB_MIXER_U32,
};
typedef void (*usb_mixer_elem_dump_func_t)(struct snd_info_buffer *buffer,