Replace NULL with 0 in uac_mixer_unit_bmControls() to fix the following
linux/usb/audio.h userspace compilation error:
/usr/include/linux/usb/audio.h: In function 'uac_mixer_unit_bmControls':
/usr/include/linux/usb/audio.h:304:10: error: 'NULL' undeclared (first use in
this function)
return NULL;
Fixes: 6cfd839ae78e ("ALSA: usb-audio: UAC3. Add support for mixer unit.")
Cc: <[email protected]> # v4.18
Signed-off-by: Dmitry V. Levin <[email protected]>
---
include/uapi/linux/usb/audio.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/uapi/linux/usb/audio.h b/include/uapi/linux/usb/audio.h
index 74e520fb944f..2b61fe34b2ca 100644
--- a/include/uapi/linux/usb/audio.h
+++ b/include/uapi/linux/usb/audio.h
@@ -301,7 +301,7 @@ static inline __u8 *uac_mixer_unit_bmControls(struct
uac_mixer_unit_descriptor *
case UAC_VERSION_3:
return &desc->baSourceID[desc->bNrInPins + 2];
default:
- return NULL;
+ return 0;
}
}
--
ldv
