serial: max310x: Add error checking in probe()

[ Upstream commit 672a37ba8af1f2ebcedeb94aea2cdd047f805f30 ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/tty/serial/max310x.c b/drivers/tty/serial/max310x.c
index 4eb8d372f619f4af677847676576759a25c59f09..44b78e979cdc44332ea68b99d18329c71c618129 100644 (file)
--- a/drivers/tty/serial/max310x.c
+++ b/drivers/tty/serial/max310x.c
@@ -1656,6 +1656,8 @@ 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);
 
                regmaps[i] = devm_regmap_init_i2c(port_client, &regcfg_i2c);
        }