FAILED: patch "[PATCH] ALSA: hda: cs35l56: Propagate ASP TX source control errors" failed to apply to 6.6-stable tree

[<gregkh@linuxfoundation.org>]

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The patch below does not apply to the 6.6-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@vger.kernel.org>.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.6.y
git checkout FETCH_HEAD
git cherry-pick -x 0faacc0841d66f3cf51989c10a83f3a82d52ff2c
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable@vger.kernel.org>' --in-reply-to '2026051202-kiln-obstinate-3d53@gregkh' --subject-prefix 'PATCH 6.6.y' HEAD^..

Possible dependencies:



thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 0faacc0841d66f3cf51989c10a83f3a82d52ff2c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?C=C3=A1ssio=20Gabriel?= <cassiogabrielcontato@gmail.com>
Date: Thu, 23 Apr 2026 10:11:31 -0300
Subject: [PATCH] ALSA: hda: cs35l56: Propagate ASP TX source control errors
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
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cs35l56_hda_mixer_get() ignores regmap_read() and
cs35l56_hda_mixer_put() ignores regmap_update_bits_check().

This makes the ASP TX source controls report success when a regmap
access fails. The write path returns no change instead of an error,
and the read path continues after a failed read instead of aborting
the control callback.

Propagate the regmap errors, matching the posture and volume controls
in this driver.

Fixes: 73cfbfa9caea ("ALSA: hda/cs35l56: Add driver for Cirrus Logic CS35L56 amplifier")
Cc: stable@vger.kernel.org
Signed-off-by: Cássio Gabriel <cassiogabrielcontato@gmail.com>
Reviewed-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://patch.msgid.link/20260423-alsa-cs35l56-asp-tx-source-errors-v1-1-17ea7c62ec31@gmail.com

diff --git a/sound/hda/codecs/side-codecs/cs35l56_hda.c b/sound/hda/codecs/side-codecs/cs35l56_hda.c
index 1ace4beef508..dc25960a4f23 100644
--- a/sound/hda/codecs/side-codecs/cs35l56_hda.c
+++ b/sound/hda/codecs/side-codecs/cs35l56_hda.c
@@ -180,11 +180,15 @@ static int cs35l56_hda_mixer_get(struct snd_kcontrol *kcontrol,
 {
 	struct cs35l56_hda *cs35l56 = snd_kcontrol_chip(kcontrol);
 	unsigned int reg_val;
-	int i;
+	int i, ret;
 
 	cs35l56_hda_wait_dsp_ready(cs35l56);
 
-	regmap_read(cs35l56->base.regmap, kcontrol->private_value, &reg_val);
+	ret = regmap_read(cs35l56->base.regmap, kcontrol->private_value,
+			  &reg_val);
+	if (ret)
+		return ret;
+
 	reg_val &= CS35L56_ASP_TXn_SRC_MASK;
 
 	for (i = 0; i < CS35L56_NUM_INPUT_SRC; ++i) {
@@ -203,15 +207,20 @@ static int cs35l56_hda_mixer_put(struct snd_kcontrol *kcontrol,
 	struct cs35l56_hda *cs35l56 = snd_kcontrol_chip(kcontrol);
 	unsigned int item = ucontrol->value.enumerated.item[0];
 	bool changed;
+	int ret;
 
 	if (item >= CS35L56_NUM_INPUT_SRC)
 		return -EINVAL;
 
 	cs35l56_hda_wait_dsp_ready(cs35l56);
 
-	regmap_update_bits_check(cs35l56->base.regmap, kcontrol->private_value,
-				 CS35L56_INPUT_MASK, cs35l56_tx_input_values[item],
-				 &changed);
+	ret = regmap_update_bits_check(cs35l56->base.regmap,
+				       kcontrol->private_value,
+				       CS35L56_INPUT_MASK,
+				       cs35l56_tx_input_values[item],
+				       &changed);
+	if (ret)
+		return ret;
 
 	return changed;
 }