[PATCH 6.1.y] ALSA: rawmidi: Return the error from snd_rawmidi_input_params()

[Sasha Levin <sashal@kernel.org>]

From: HyeongJun An <sammiee5311@gmail.com>

[ Upstream commit f4a23e17d84fd2a152d9e12369761934e1af0ee8 ]

The snd_rawmidi_input_params() computes err for the three invalid mode
combinations and for resize_runtime_buffer(), applies the new framing
and clock type only when err is zero, and then returns 0 anyway.  A
caller that asked for parameters the kernel rejected is told the change
succeeded, and the substream keeps its old buffer.

The open_mutex conversion turned the early returns into assignments.
It handled the output sibling correctly, which still returns err, and
left this one behind.

Fixes: 94b98194b62e ("ALSA: rawmidi: Take open_mutex around parameter changes")
Cc: stable@vger.kernel.org
Assisted-by: Claude:claude-opus-5
Signed-off-by: HyeongJun An <sammiee5311@gmail.com>
Link: https://patch.msgid.link/20260902125058.19499-1-sammiee5311@gmail.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 sound/core/rawmidi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/core/rawmidi.c b/sound/core/rawmidi.c
index d8edb60550724..a1c4e280e7894 100644
--- a/sound/core/rawmidi.c
+++ b/sound/core/rawmidi.c
@@ -793,7 +793,7 @@ int snd_rawmidi_input_params(struct snd_rawmidi_substream *substream,
 		substream->clock_type = clock_type;
 	}
 	mutex_unlock(&substream->rmidi->open_mutex);
-	return 0;
+	return err;
 }
 EXPORT_SYMBOL(snd_rawmidi_input_params);
 
-- 
2.53.0