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authorJean Delvare <khali@linux-fr.org>2009-10-04 22:53:46 +0200
committerJean Delvare <khali@linux-fr.org>2009-10-04 22:53:46 +0200
commit6f6b35e133fe4313277b30fc1a7ea313875ea6c9 (patch)
tree1b7aa0dde7d69b0f90b80a0398c9699faae6260e
parent18669eabde2ff5fc446e72e043f0539059763438 (diff)
downloadlinux-2.6.34-ux500-6f6b35e133fe4313277b30fc1a7ea313875ea6c9.tar.gz
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>
-rw-r--r--drivers/macintosh/therm_adt746x.c4
-rw-r--r--drivers/macintosh/therm_pm72.c4
-rw-r--r--drivers/macintosh/windfarm_lm75_sensor.c4
-rw-r--r--drivers/macintosh/windfarm_max6690_sensor.c4
-rw-r--r--drivers/macintosh/windfarm_smu_sat.c4
5 files changed, 15 insertions, 5 deletions
diff --git a/drivers/macintosh/therm_adt746x.c b/drivers/macintosh/therm_adt746x.c
index fde377c60cc..556f0feaa4d 100644
--- a/drivers/macintosh/therm_adt746x.c
+++ b/drivers/macintosh/therm_adt746x.c
@@ -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;
}
diff --git a/drivers/macintosh/therm_pm72.c b/drivers/macintosh/therm_pm72.c
index a028598af2d..ea32c7e5a9a 100644
--- a/drivers/macintosh/therm_pm72.c
+++ b/drivers/macintosh/therm_pm72.c
@@ -286,6 +286,8 @@ struct fcu_fan_table fcu_fans[] = {
},
};
+static struct i2c_driver therm_pm72_driver;
+
/*
* Utility function to create an i2c_client structure and
* attach it to one of u3 adapters
@@ -318,7 +320,7 @@ static struct i2c_client *attach_i2c_chip(int id, const char *name)
* 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(&clt->detected, &clt->driver->clients);
+ list_add_tail(&clt->detected, &therm_pm72_driver.clients);
return clt;
}
diff --git a/drivers/macintosh/windfarm_lm75_sensor.c b/drivers/macintosh/windfarm_lm75_sensor.c
index 529886c7a82..ed6426a1077 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;
diff --git a/drivers/macintosh/windfarm_max6690_sensor.c b/drivers/macintosh/windfarm_max6690_sensor.c
index e2a55ecda2b..a67b349319e 100644
--- a/drivers/macintosh/windfarm_max6690_sensor.c
+++ b/drivers/macintosh/windfarm_max6690_sensor.c
@@ -88,6 +88,8 @@ static int wf_max6690_probe(struct i2c_client *client,
return rc;
}
+static struct i2c_driver wf_max6690_driver;
+
static struct i2c_client *wf_max6690_create(struct i2c_adapter *adapter,
u8 addr, const char *loc)
{
@@ -119,7 +121,7 @@ static struct i2c_client *wf_max6690_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_max6690_driver.clients);
return client;
fail:
diff --git a/drivers/macintosh/windfarm_smu_sat.c b/drivers/macintosh/windfarm_smu_sat.c
index 5da729e58f9..e20330a2895 100644
--- a/drivers/macintosh/windfarm_smu_sat.c
+++ b/drivers/macintosh/windfarm_smu_sat.c
@@ -194,6 +194,8 @@ static struct wf_sensor_ops wf_sat_ops = {
.owner = THIS_MODULE,
};
+static struct i2c_driver wf_sat_driver;
+
static void wf_sat_create(struct i2c_adapter *adapter, struct device_node *dev)
{
struct i2c_board_info info;
@@ -222,7 +224,7 @@ static void wf_sat_create(struct i2c_adapter *adapter, struct device_node *dev)
* 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_sat_driver.clients);
}
static int wf_sat_probe(struct i2c_client *client,