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authorWolfram Sang <wsa+renesas@sang-engineering.com>2020-07-25 21:50:53 +0200
committerWolfram Sang <wsa@kernel.org>2020-07-28 18:37:17 +0200
commit8808981baf96e1b3dea1f08461e4d958aa0dbde1 (patch)
treee4837ed95a192f04ae2c5e46e2508f33cadd9abe /drivers/i2c
parent1b1be3bf27b62f5abcf85c6f3214bdb9c7526685 (diff)
i2c: slave: add sanity check when unregistering
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>
Diffstat (limited to 'drivers/i2c')
-rw-r--r--drivers/i2c/i2c-core-slave.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/i2c/i2c-core-slave.c b/drivers/i2c/i2c-core-slave.c
index 549751347e6c..1589179d5eb9 100644
--- a/drivers/i2c/i2c-core-slave.c
+++ b/drivers/i2c/i2c-core-slave.c
@@ -58,6 +58,9 @@ 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;