[PATCH 5.13 178/300] ASoC: rt5682: Properly turn off regulators if wrong device ID

Greg Kroah-Hartman
2021-09-13T14:09:03Z

From: Douglas Anderson <dianders@chromium.org>

[ Upstream commit 772d44526e203c062171786e514373f129616278 ]

When I booted up on a board that had a slightly different codec
stuffed on it, I got this message at bootup:

rt5682 9-001a: Device with ID register 6749 is not rt5682

That's normal/expected, but what wasn't normal was the splat that I
got after:

WARNING: CPU: 7 PID: 176 at drivers/regulator/core.c:2151 _regulator_put+0x150/0x158
pc : _regulator_put+0x150/0x158
...
Call trace:
_regulator_put+0x150/0x158
regulator_bulk_free+0x48/0x70
devm_regulator_bulk_release+0x20/0x2c
release_nodes+0x1cc/0x244
devres_release_all+0x44/0x60
really_probe+0x17c/0x378
...

This is because the error paths don't turn off the regulator. Let's
fix that.

Fixes: 0ddce71c21f0 ("ASoC: rt5682: add rt5682 codec driver")
Fixes: 87b42abae99d ("ASoC: rt5682: Implement remove callback")
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Link: https://lore.kernel.org/r/20210811081751.v2.1.I4a1d9aa5d99e05aeee15c2768db600158d76cab8@changeid
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
sound/soc/codecs/rt5682-i2c.c | 13 ++++++++++++-
1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/sound/soc/codecs/rt5682-i2c.c b/sound/soc/codecs/rt5682-i2c.c
index 4a56a52adab5..e559b965a0a6 100644
--- a/sound/soc/codecs/rt5682-i2c.c
+++ b/sound/soc/codecs/rt5682-i2c.c
@@ -117,6 +117,13 @@ static struct snd_soc_dai_driver rt5682_dai[] = {
},
};

+static void rt5682_i2c_disable_regulators(void *data)
+{
+ struct rt5682_priv *rt5682 = data;
+
+ regulator_bulk_disable(ARRAY_SIZE(rt5682->supplies), rt5682->supplies);
+}
+
static int rt5682_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
@@ -157,6 +164,11 @@ static int rt5682_i2c_probe(struct i2c_client *i2c,
return ret;
}

+ ret = devm_add_action_or_reset(&i2c->dev, rt5682_i2c_disable_regulators,
+ rt5682);
+ if (ret)
+ return ret;
+
ret = regulator_bulk_enable(ARRAY_SIZE(rt5682->supplies),
rt5682->supplies);
if (ret) {
@@ -285,7 +297,6 @@ static int rt5682_i2c_remove(struct i2c_client *client)
struct rt5682_priv *rt5682 = i2c_get_clientdata(client);

rt5682_i2c_shutdown(client);
- regulator_bulk_disable(ARRAY_SIZE(rt5682->supplies), rt5682->supplies);

return 0;
}
--
2.30.2