diff options
| author | Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> | 2024-07-10 15:52:31 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-10-10 12:00:24 +0200 |
| commit | 393b53d6ff494ecd8599294f0c2b8086d7b1324f (patch) | |
| tree | 90700cd7e84aa18bbfd2d38e912ddb097169dee6 /sound | |
| parent | 27986154c37a8329109b9bf9ab7b7f40cbbfc698 (diff) | |
ASoC: codecs: wsa883x: Handle reading version failure
[ 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@linaro.org>
Link: https://patch.msgid.link/20240710-asoc-wsa88xx-version-v1-2-f1c54966ccde@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/soc/codecs/wsa883x.c | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/sound/soc/codecs/wsa883x.c b/sound/soc/codecs/wsa883x.c index 2169d9398984..1831d4487ba9 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; } |