ASoC: codecs: lpass-tx-macro: Fix enum kcontrol accesses

The "DEC0 MODE" to "DEC7 MODE" controls are enumerated, but
tx_macro_dec_mode_get() and tx_macro_dec_mode_put() access their
value through ucontrol->value.integer.value[0] (a long) instead of
ucontrol->value.enumerated.item[0] (an unsigned int).

This same pattern was fixed in the sibling drivers by
commit bcfe5f76cc40 ("ASoC: codecs: rx-macro: fix accessing array
out of bounds for enum type") and
commit 0ea5eff7c606 ("ASoC: codecs: va-macro: fix accessing array
out of bounds for enum type"), but tx-macro was missed.

On 64-bit kernels built with CONFIG_SND_CTL_DEBUG, the elem value
sanity check catches the 4 bytes written past the enumerated item
and every read of these controls fails with -EINVAL:

  snd-sm8250 sound: control 2:0:0:DEC0 MODE:0: access overflow

Fixes: c39667ddcfc5 ("ASoC: codecs: lpass-tx-macro: add support for lpass tx macro")
Assisted-by: Claude:claude-fable-5
Cc: stable@vger.kernel.org
Signed-off-by: Dawid Wróbel <me@dawidwrobel.com>
Reviewed-by: Srinivas Kandagatla <srinivas.kandagatla@oss.qualcomm.com>
Link: https://patch.msgid.link/20260730-worktree-lpass-tx-macro-enum-fix-v2-1-6d091c736116@dawidwrobel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/codecs/lpass-tx-macro.c b/sound/soc/codecs/lpass-tx-macro.c
index f7d168f557dd85e568101ad2586ffcf832f5dd6e..0cbf50647ff57c294e00d687eacf4675cbd221d9 100644 (file)
--- a/sound/soc/codecs/lpass-tx-macro.c
+++ b/sound/soc/codecs/lpass-tx-macro.c
@@ -1075,7 +1075,7 @@ static int tx_macro_dec_mode_get(struct snd_kcontrol *kcontrol,
        struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
        int path = e->shift_l;
 
-       ucontrol->value.integer.value[0] = tx->dec_mode[path];
+       ucontrol->value.enumerated.item[0] = tx->dec_mode[path];
 
        return 0;
 }
@@ -1084,7 +1084,7 @@ static int tx_macro_dec_mode_put(struct snd_kcontrol *kcontrol,
                                 struct snd_ctl_elem_value *ucontrol)
 {
        struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
-       int value = ucontrol->value.integer.value[0];
+       int value = ucontrol->value.enumerated.item[0];
        struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
        int path = e->shift_l;
        struct tx_macro *tx = snd_soc_component_get_drvdata(component);