| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.15 143/167] ASoC: rt711-sdca: fix kernel NULL pointer dereference when IO error | Date | Tue, 19 Jul 2022 13:54:35 +0200 |
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From: Shuming Fan <shumingf@realtek.com>
[ Upstream commit 1df793d479bef546569fc2e409ff8bb3f0fb8e99 ]
The initial settings will be written before the codec probe function. But, the rt711->component doesn't be assigned yet. If IO error happened during initial settings operations, it will cause the kernel panic. This patch changed component->dev to slave->dev to fix this issue.
Signed-off-by: Shuming Fan <shumingf@realtek.com> Link: https://lore.kernel.org/r/20220621090719.30558-1-shumingf@realtek.com Signed-off-by: Mark Brown <broonie@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org> --- sound/soc/codecs/rt711-sdca.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/sound/soc/codecs/rt711-sdca.c b/sound/soc/codecs/rt711-sdca.c index 60aef52b3fe4..3b5df3ea2f60 100644 --- a/sound/soc/codecs/rt711-sdca.c +++ b/sound/soc/codecs/rt711-sdca.c @@ -34,7 +34,7 @@ static int rt711_sdca_index_write(struct rt711_sdca_priv *rt711, ret = regmap_write(regmap, addr, value); if (ret < 0) - dev_err(rt711->component->dev, + dev_err(&rt711->slave->dev, "Failed to set private value: %06x <= %04x ret=%d\n", addr, value, ret); @@ -50,7 +50,7 @@ static int rt711_sdca_index_read(struct rt711_sdca_priv *rt711, ret = regmap_read(regmap, addr, value); if (ret < 0) - dev_err(rt711->component->dev, + dev_err(&rt711->slave->dev, "Failed to get private value: %06x => %04x ret=%d\n", addr, *value, ret); -- 2.35.1
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