ALSA: caiaq: input: Add error handling for unsupported input methods in `snd_usb_caia...

[ Upstream commit 0d727e1856ef22dd9337199430258cb64cbbc658 ]

Smatch complains that:
snd_usb_caiaq_input_init() warn: missing error code 'ret'

This patch adds a new case to handle the situation where the
device does not support any input methods in the
`snd_usb_caiaq_input_init` function. It returns an `-EINVAL` error code
to indicate that no input methods are supported on the device.

Fixes: a59ce4465ca7 ("[ALSA] Add Native Instrument usb audio device support")
Signed-off-by: Ruliang Lin <u202112092@hust.edu.cn>
Reviewed-by: Dongliang Mu <dzm91@hust.edu.cn>
Acked-by: Daniel Mack <daniel@zonque.org>
Link: https://lore.kernel.org/r/20230504065054.3309-1-u202112092@hust.edu.cn
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/sound/usb/caiaq/input.c b/sound/usb/caiaq/input.c
index 533eb69fe4e6950a5af62c3be007633dc6df2db4..cd5a8584dbe328dc3113444c292a47395ef936e3 100644 (file)
--- a/sound/usb/caiaq/input.c
+++ b/sound/usb/caiaq/input.c
@@ -804,6 +804,7 @@ int snd_usb_caiaq_input_init(struct snd_usb_caiaqdev *cdev)
 
        default:
                /* no input methods supported on this device */
+               ret = -EINVAL;
                goto exit_free_idev;
        }