ASoC: SDCA: Add missing default in switch in entity_pde_event()

JIRA: https://issues.redhat.com/browse/RHEL-101627

commit 2ed526b
Author: Charles Keepax <ckeepax@opensource.cirrus.com>
Date: Tue Jun 24 13:28:39 2025 +0100

    ASoC: SDCA: Add missing default in switch in entity_pde_event()

    The current code should be safe as the PDE widget only registers for the
    two events handled in the switch statement. However, it is causing a
    smatch warning and also is a little fragile to future code changes, add
    a default case to avoid the warning and make the code more robust.

    Fixes: 2c8b3a8 ("ASoC: SDCA: Create DAPM widgets and routes from DisCo")
    Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
    Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
    Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
    Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.dev>
    Link: https://patch.msgid.link/20250624122844.2761627-3-ckeepax@opensource.cirrus.com
    Signed-off-by: Mark Brown <broonie@kernel.org>

Signed-off-by: Jaroslav Kysela <jkysela@redhat.com>

Author: jkysela-rh

sound/soc/sdca/sdca_asoc.c

@@ -397,6 +397,8 @@ static int entity_pde_event(struct snd_soc_dapm_widget *widget,
 		from = widget->off_val;
 		to = widget->on_val;
 		break;
+	default:
+		return 0;
 	}
 
 	for (i = 0; i < entity->pde.num_max_delay; i++) {