From: Wolfram Sang <wsa+renesas@sang-engineering.com> [ Upstream commit 8808981baf96e1b3dea1f08461e4d958aa0dbde1 ] Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Reviewed-by: Alain Volmat <alain.volmat@st.com> Signed-off-by: Wolfram Sang <wsa@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org> --- drivers/i2c/i2c-core-slave.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/i2c/i2c-core-slave.c b/drivers/i2c/i2c-core-slave.c index 88959c8580ce..f2e7e373ee47 100644 --- a/drivers/i2c/i2c-core-slave.c +++ b/drivers/i2c/i2c-core-slave.c @@ -62,6 +62,9 @@ int i2c_slave_unregister(struct i2c_client *client) { int ret; + if (IS_ERR_OR_NULL(client)) + return -EINVAL; + if (!client->adapter->algo->unreg_slave) { dev_err(&client->dev, "%s: not supported by adapter\n", __func__); return -EOPNOTSUPP; -- 2.25.1