i2c: Check for address business before creating clients
We check for address business in i2c_probe_address(),
i2c_detect_address() and i2c_new_probed_device(), but this isn't
sufficient. Drivers can call i2c_attach_client() and
i2c_new_device() on any address, so we must check the address there
as well.
This fixes bug #11239:
http://bugzilla.kernel.org/show_bug.cgi?id=11239
Signed-off-by: Jean Delvare <khali@linux-fr.org>
diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
index c16dcad..550853f 100644
--- a/drivers/i2c/i2c-core.c
+++ b/drivers/i2c/i2c-core.c
@@ -813,7 +813,12 @@
int i2c_attach_client(struct i2c_client *client)
{
struct i2c_adapter *adapter = client->adapter;
- int res = 0;
+ int res;
+
+ /* Check for address business */
+ res = i2c_check_addr(adapter, client->addr);
+ if (res)
+ return res;
client->dev.parent = &client->adapter->dev;
client->dev.bus = &i2c_bus_type;