From cdb2cc1110db0fbe2a2dddf86933248a904e3532 Mon Sep 17 00:00:00 2001 From: Jean Delvare Date: Sun, 4 Oct 2009 22:53:46 +0200 Subject: [PATCH] macintosh: Don't assume i2c device probing always succeeds commit 6f6b35e133fe4313277b30fc1a7ea313875ea6c9 upstream. 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 Tested-by: Tim Shepard Cc: Colin Leroy Signed-off-by: Greg Kroah-Hartman --- drivers/macintosh/therm_adt746x.c | 4 +++- drivers/macintosh/therm_pm72.c | 4 +++- drivers/macintosh/windfarm_lm75_sensor.c | 4 +++- drivers/macintosh/windfarm_max6690_sensor.c | 4 +++- drivers/macintosh/windfarm_smu_sat.c | 4 +++- 5 files changed, 15 insertions(+), 5 deletions(-) diff --git a/drivers/macintosh/therm_adt746x.c b/drivers/macintosh/therm_adt746x.c index fde377c60cca..556f0feaa4df 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 a028598af2d3..ea32c7e5a9af 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 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; diff --git a/drivers/macintosh/windfarm_max6690_sensor.c b/drivers/macintosh/windfarm_max6690_sensor.c index e2a55ecda2b2..a67b349319e9 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 5da729e58f99..e20330a28959 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, -- 2.39.5