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i2c: slave: add sanity check when unregistering
[ Upstream commit 8808981baf
]
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>
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@ -58,6 +58,9 @@ int i2c_slave_unregister(struct i2c_client *client)
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{
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int ret;
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if (IS_ERR_OR_NULL(client))
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return -EINVAL;
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if (!client->adapter->algo->unreg_slave) {
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dev_err(&client->dev, "%s: not supported by adapter\n", __func__);
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return -EOPNOTSUPP;
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