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mfd: wm831x-i2c: Add NULL check before pointer dereference

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Add NULL check before dereferencing pointer of_id in order to avoid
a potential NULL pointer dereference.

Addresses-Coverity-ID: 1408829
Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
Gustavo A. R. Silva 2017-05-24 04:26:23 -05:00 • committed by Lee Jones
parent 87d284443d
commit 800e54558b
1 changed files with 4 additions and 0 deletions
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4
drivers/mfd/wm831x-i2c.c
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@ -37,6 +37,10 @@ static int wm831x_i2c_probe(struct i2c_client *i2c,
if (i2c->dev.of_node) { if (i2c->dev.of_node) {
of_id = of_match_device(wm831x_of_match, &i2c->dev); of_id = of_match_device(wm831x_of_match, &i2c->dev);
if (!of_id) {
dev_err(&i2c->dev, "Failed to match device\n");
return -ENODEV;
}
type = (enum wm831x_parent)of_id->data; type = (enum wm831x_parent)of_id->data;
} else { } else {
type = (enum wm831x_parent)id->driver_data; type = (enum wm831x_parent)id->driver_data;