ASoC: codecs: wsa881x: handle timeouts in resume path

Currently we do not check if SoundWire slave initialization timeout
expired before continuing to access its registers.

Its possible that the registers are not accessible if timeout is
expired. Handle this by returning timeout in resume path.

Reported-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Fixes: db8f6206f01b ("ASoC: codecs: wsa881x: add runtime pm support")
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20220630130023.9308-1-srinivas.kandagatla@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/codecs/wsa881x.c b/sound/soc/codecs/wsa881x.c
index dc954b85a98817ccdbf4b44fa960ee5c8fbeb607..6c8b1db649b8988b28e1c7ebcdc11cec7d2ee122 100644 (file)
--- a/sound/soc/codecs/wsa881x.c
+++ b/sound/soc/codecs/wsa881x.c
@@ -1173,11 +1173,17 @@ static int __maybe_unused wsa881x_runtime_resume(struct device *dev)
        struct sdw_slave *slave = dev_to_sdw_dev(dev);
        struct regmap *regmap = dev_get_regmap(dev, NULL);
        struct wsa881x_priv *wsa881x = dev_get_drvdata(dev);
+       unsigned long time;
 
        gpiod_direction_output(wsa881x->sd_n, 1);
 
-       wait_for_completion_timeout(&slave->initialization_complete,
-                                   msecs_to_jiffies(WSA881X_PROBE_TIMEOUT));
+       time = wait_for_completion_timeout(&slave->initialization_complete,
+                                          msecs_to_jiffies(WSA881X_PROBE_TIMEOUT));
+       if (!time) {
+               dev_err(dev, "Initialization not complete, timed out\n");
+               gpiod_direction_output(wsa881x->sd_n, 0);
+               return -ETIMEDOUT;
+       }
 
        regcache_cache_only(regmap, false);
        regcache_sync(regmap);