macintosh: Don't assume i2c device probing always succeeds
If i2c device probing fails, then there is no driver to dereference
after calling i2c_new_device(). Stop assuming that probing will always
succeed, to avoid NULL pointer dereferences. We have an easier access
to the driver anyway.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Tested-by: Tim Shepard <shep@alum.mit.edu>
Cc: Colin Leroy <colin@colino.net>
diff --git a/drivers/macintosh/therm_adt746x.c b/drivers/macintosh/therm_adt746x.c
index fde377c..556f0fe 100644
--- a/drivers/macintosh/therm_adt746x.c
+++ b/drivers/macintosh/therm_adt746x.c
@@ -124,6 +124,8 @@
return data;
}
+static struct i2c_driver thermostat_driver;
+
static int
attach_thermostat(struct i2c_adapter *adapter)
{
@@ -148,7 +150,7 @@
* Let i2c-core delete that device on driver removal.
* This is safe because i2c-core holds the core_lock mutex for us.
*/
- list_add_tail(&client->detected, &client->driver->clients);
+ list_add_tail(&client->detected, &thermostat_driver.clients);
return 0;
}