i2c: Legacy i2c drivers shouldn't issue uevents

Prevent legacy drivers from issuing uevents for device creation/removal,
so that userspace can't cause modprobing loops for them.  This became a
problem for some legacy PC drivers.  I can't easily see it becoming an
issue with I2C legacy drivers, but consistency-in-paranoia seems likely
to be a good thing here.  For usable i2c-level driver model uevents, just
switch to a new-style driver.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Jean Delvare <khali@linux-fr.org>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
index 64f8e56d300e..435925eba437 100644
--- a/drivers/i2c/i2c-core.c
+++ b/drivers/i2c/i2c-core.c
@@ -697,9 +697,10 @@ int i2c_attach_client(struct i2c_client *client)
         if (client->driver)
                 client->dev.driver = &client->driver->driver;
 
-        if (client->driver && !is_newstyle_driver(client->driver))
+        if (client->driver && !is_newstyle_driver(client->driver)) {
                 client->dev.release = i2c_client_release;
-        else
+                client->dev.uevent_suppress = 1;
+        } else
                 client->dev.release = i2c_client_dev_release;
 
         snprintf(&client->dev.bus_id[0], sizeof(client->dev.bus_id),