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macintosh: Don't assume i2c device probing always succeeds

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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>
This commit is contained in:
Jean Delvare
2009-10-04 22:53:46 +02:00
parent 18669eabde
commit 6f6b35e133
5 changed files with 15 additions and 5 deletions
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4
drivers/macintosh/therm_adt746x.c
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@ -124,6 +124,8 @@ read_reg(struct thermostat* th, int reg)
return data;
}
static struct i2c_driver thermostat_driver;
static int
attach_thermostat(struct i2c_adapter *adapter)
{
@ -148,7 +150,7 @@ attach_thermostat(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, &thermostat_driver.clients);
return 0;
}