ASoC: codecs: wsa883x: 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: 43b8c7dc85a1 ("ASoC: codecs: add wsa883x amplifier support")
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20220630130023.9308-2-srinivas.kandagatla@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/codecs/wsa883x.c b/sound/soc/codecs/wsa883x.c
index e8f519e..40c7d64 100644 (file)
--- a/sound/soc/codecs/wsa883x.c
+++ b/sound/soc/codecs/wsa883x.c
@@ -1455,6 +1455,7 @@ static int __maybe_unused wsa883x_runtime_resume(struct device *dev)
        struct sdw_slave *slave = dev_to_sdw_dev(dev);
        struct regmap *regmap = dev_get_regmap(dev, NULL);
        struct wsa883x_priv *wsa883x = dev_get_drvdata(dev);
+       unsigned long time;
        int ret;
 
        ret = regulator_enable(wsa883x->vdd);
@@ -1465,8 +1466,14 @@ static int __maybe_unused wsa883x_runtime_resume(struct device *dev)
 
        gpiod_direction_output(wsa883x->sd_n, 1);
 
-       wait_for_completion_timeout(&slave->initialization_complete,
-                                   msecs_to_jiffies(WSA883X_PROBE_TIMEOUT));
+       time = wait_for_completion_timeout(&slave->initialization_complete,
+                                          msecs_to_jiffies(WSA883X_PROBE_TIMEOUT));
+       if (!time) {
+               dev_err(dev, "Initialization not complete, timed out\n");
+               gpiod_direction_output(wsa883x->sd_n, 0);
+               regulator_disable(wsa883x->vdd);
+               return -ETIMEDOUT;
+       }
 
        usleep_range(20000, 20010);
        regcache_cache_only(regmap, false);