Correct some unchecked re-allocations of ret whilst reading the device ID and ensure the hardware state is returned to off on the error paths.
Reported-by: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com Signed-off-by: Charles Keepax ckeepax@opensource.cirrus.com --- sound/soc/codecs/cs42l42.c | 18 ++++++++---------- 1 file changed, 8 insertions(+), 10 deletions(-)
diff --git a/sound/soc/codecs/cs42l42.c b/sound/soc/codecs/cs42l42.c index bf982e145e945..594d771336719 100644 --- a/sound/soc/codecs/cs42l42.c +++ b/sound/soc/codecs/cs42l42.c @@ -36,6 +36,7 @@ #include <dt-bindings/sound/cs42l42.h>
#include "cs42l42.h" +#include "cirrus_legacy.h"
static const struct reg_default cs42l42_reg_defaults[] = { { CS42L42_FRZ_CTL, 0x00 }, @@ -1816,8 +1817,7 @@ static int cs42l42_i2c_probe(struct i2c_client *i2c_client, const struct i2c_device_id *id) { struct cs42l42_private *cs42l42; - int ret, i; - unsigned int devid = 0; + int ret, i, devid; unsigned int reg;
cs42l42 = devm_kzalloc(&i2c_client->dev, sizeof(struct cs42l42_private), @@ -1880,14 +1880,12 @@ static int cs42l42_i2c_probe(struct i2c_client *i2c_client, "Failed to request IRQ: %d\n", ret);
/* initialize codec */ - ret = regmap_read(cs42l42->regmap, CS42L42_DEVID_AB, ®); - devid = (reg & 0xFF) << 12; - - ret = regmap_read(cs42l42->regmap, CS42L42_DEVID_CD, ®); - devid |= (reg & 0xFF) << 4; - - ret = regmap_read(cs42l42->regmap, CS42L42_DEVID_E, ®); - devid |= (reg & 0xF0) >> 4; + devid = cirrus_read_device_id(cs42l42->regmap, CS42L42_DEVID_AB); + if (devid < 0) { + ret = devid; + dev_err(&i2c_client->dev, "Failed to read device ID: %d\n", ret); + goto err_disable; + }
if (devid != CS42L42_CHIP_ID) { ret = -ENODEV;