This is a note to let you know that I've just added the patch titled
i2c: slave: add sanity check when unregistering
to the 4.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
i2c-slave-add-sanity-check-when-unregistering.patch
and it can be found in the queue-4.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit f5ca0886dc467dbd25834ea127afb8ad362e1f44
Author: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx>
Date: Sat Jul 25 21:50:53 2020 +0200
i2c: slave: add sanity check when unregistering
[ Upstream commit 8808981baf96e1b3dea1f08461e4d958aa0dbde1 ]
Signed-off-by: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx>
Reviewed-by: Alain Volmat <alain.volmat@xxxxxx>
Signed-off-by: Wolfram Sang <wsa@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/i2c/i2c-core-slave.c b/drivers/i2c/i2c-core-slave.c
index 21051aba39e3a..d89bc31e06227 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;
