serial: max310x: Add error checking in probe()

Check if devm_i2c_new_dummy_device() fails.

Fixes: 2e1f2d9a9bdb ("serial: max310x: implement I2C support")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Link: https://lore.kernel.org/r/aJTMPZiKqeXSE-KM@stanley.mountain
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/max310x.c b/drivers/tty/serial/max310x.c
index ce260e9949c3c268e706b2615d6fc01adc21e49b..d9a0100b92d2b93ab9f33c2471757b49585ddd32 100644 (file)
--- a/drivers/tty/serial/max310x.c
+++ b/drivers/tty/serial/max310x.c
@@ -1644,6 +1644,8 @@ static int max310x_i2c_probe(struct i2c_client *client)
                port_client = devm_i2c_new_dummy_device(&client->dev,
                                                        client->adapter,
                                                        port_addr);
+               if (IS_ERR(port_client))
+                       return PTR_ERR(port_client);
 
                regcfg_i2c.name = max310x_regmap_name(i);
                regmaps[i] = devm_regmap_init_i2c(port_client, &regcfg_i2c);