ASoc: PCM6240: Return directly after a failed devm_kzalloc() in pcmdevice_i2c_probe()

[ Upstream commit 3722873d49 ]

The value “-ENOMEM” was assigned to the local variable “ret”
in one if branch after a devm_kzalloc() call failed at the beginning.
This error code will trigger then a pcmdevice_remove() call with a passed
null pointer so that an undesirable dereference will be performed.
Thus return the appropriate error code directly.

Fixes: 1324eafd37 ("ASoc: PCM6240: Create PCM6240 Family driver code")
Signed-off-by: Hao Ge <gehao@kylinos.cn>
Link: https://patch.msgid.link/20240617020954.17252-1-hao.ge@linux.dev
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

sound/soc/codecs/pcm6240.c

@@ -2087,10 +2087,8 @@ static int pcmdevice_i2c_probe(struct i2c_client *i2c)
 #endif
 
 	pcm_dev = devm_kzalloc(&i2c->dev, sizeof(*pcm_dev), GFP_KERNEL);
-	if (!pcm_dev) {
-		ret = -ENOMEM;
-		goto out;
-	}
+	if (!pcm_dev)
+		return -ENOMEM;
 
 	pcm_dev->chip_id = (id != NULL) ? id->driver_data : 0;