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Message-ID: <20240925115823.1303019-82-sashal@kernel.org>
Date: Wed, 25 Sep 2024 07:51:41 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
stable@...r.kernel.org
Cc: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
Mark Brown <broonie@...nel.org>,
Sasha Levin <sashal@...nel.org>,
srinivas.kandagatla@...aro.org,
lgirdwood@...il.com,
perex@...ex.cz,
tiwai@...e.com,
alsa-devel@...a-project.org,
linux-arm-msm@...r.kernel.org,
linux-sound@...r.kernel.org
Subject: [PATCH AUTOSEL 6.10 082/197] ASoC: codecs: wsa883x: Handle reading version failure
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
[ Upstream commit 2fbf16992e5aa14acf0441320033a01a32309ded ]
If reading version and variant from registers fails (which is unlikely
but possible, because it is a read over bus), the driver will proceed
and perform device configuration based on uninitialized stack variables.
Handle it a bit better - bail out without doing any init and failing the
update status Soundwire callback.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Link: https://patch.msgid.link/20240710-asoc-wsa88xx-version-v1-2-f1c54966ccde@linaro.org
Signed-off-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
sound/soc/codecs/wsa883x.c | 16 +++++++++++-----
1 file changed, 11 insertions(+), 5 deletions(-)
diff --git a/sound/soc/codecs/wsa883x.c b/sound/soc/codecs/wsa883x.c
index 2169d93989841..1831d4487ba9d 100644
--- a/sound/soc/codecs/wsa883x.c
+++ b/sound/soc/codecs/wsa883x.c
@@ -998,15 +998,19 @@ static const struct reg_sequence reg_init[] = {
{WSA883X_GMAMP_SUP1, 0xE2},
};
-static void wsa883x_init(struct wsa883x_priv *wsa883x)
+static int wsa883x_init(struct wsa883x_priv *wsa883x)
{
struct regmap *regmap = wsa883x->regmap;
- int variant, version;
+ int variant, version, ret;
- regmap_read(regmap, WSA883X_OTP_REG_0, &variant);
+ ret = regmap_read(regmap, WSA883X_OTP_REG_0, &variant);
+ if (ret)
+ return ret;
wsa883x->variant = variant & WSA883X_ID_MASK;
- regmap_read(regmap, WSA883X_CHIP_ID0, &version);
+ ret = regmap_read(regmap, WSA883X_CHIP_ID0, &version);
+ if (ret)
+ return ret;
wsa883x->version = version;
switch (wsa883x->variant) {
@@ -1041,6 +1045,8 @@ static void wsa883x_init(struct wsa883x_priv *wsa883x)
WSA883X_DRE_OFFSET_MASK,
wsa883x->comp_offset);
}
+
+ return 0;
}
static int wsa883x_update_status(struct sdw_slave *slave,
@@ -1049,7 +1055,7 @@ static int wsa883x_update_status(struct sdw_slave *slave,
struct wsa883x_priv *wsa883x = dev_get_drvdata(&slave->dev);
if (status == SDW_SLAVE_ATTACHED && slave->dev_num > 0)
- wsa883x_init(wsa883x);
+ return wsa883x_init(wsa883x);
return 0;
}
--
2.43.0
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