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>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/macintosh/windfarm_lm75_sensor.c b/drivers/macintosh/windfarm_lm75_sensor.c
index 529886c7a826..ed6426a10773 100644
--- a/drivers/macintosh/windfarm_lm75_sensor.c
+++ b/drivers/macintosh/windfarm_lm75_sensor.c
@@ -115,6 +115,8 @@ static int wf_lm75_probe(struct i2c_client *client,
         return rc;
 }
 
+static struct i2c_driver wf_lm75_driver;
+
 static struct i2c_client *wf_lm75_create(struct i2c_adapter *adapter,
                                              u8 addr, int ds1775,
                                              const char *loc)
@@ -157,7 +159,7 @@ static struct i2c_client *wf_lm75_create(struct i2c_adapter *adapter,
          * 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, &wf_lm75_driver.clients);
         return client;
  fail:
         return NULL;