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mfd: Fix dangling pointers

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Fix I2C-drivers which missed setting clientdata to NULL before freeing the
structure it points to. Also fix drivers which do this _after_ the structure
was freed already.

Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Wolfram Sang 2010-03-20 15:12:54 +01:00 committed by Samuel Ortiz
parent d84027bc4d
commit f322d5f009
7 changed files with 10 additions and 2 deletions
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1
drivers/mfd/88pm860x-i2c.c
View File

@ -202,6 +202,7 @@ static int __devexit pm860x_remove(struct i2c_client *client)
i2c_unregister_device(chip->companion);
i2c_set_clientdata(chip->companion, NULL);
i2c_set_clientdata(chip->client, NULL);
i2c_set_clientdata(client, NULL);
kfree(chip);
return 0;
}

2
drivers/mfd/ab3100-core.c
View File

@ -920,6 +920,7 @@ static int __init ab3100_probe(struct i2c_client *client,
i2c_unregister_device(ab3100->testreg_client);
exit_no_testreg_client:
exit_no_detect:
i2c_set_clientdata(client, NULL);
kfree(ab3100);
return err;
}
@ -941,6 +942,7 @@ static int __exit ab3100_remove(struct i2c_client *client)
* their notifiers so deactivate IRQ
*/
free_irq(client->irq, ab3100);
i2c_set_clientdata(client, NULL);
kfree(ab3100);
return 0;
}

1
drivers/mfd/da903x.c
View File

@ -544,6 +544,7 @@ static int __devexit da903x_remove(struct i2c_client *client)
struct da903x_chip *chip = i2c_get_clientdata(client);
da903x_remove_subdevs(chip);
i2c_set_clientdata(client, NULL);
kfree(chip);
return 0;
}

3
drivers/mfd/menelaus.c
View File

@ -1228,6 +1228,7 @@ static int menelaus_probe(struct i2c_client *client,
free_irq(client->irq, menelaus);
flush_scheduled_work();
fail1:
i2c_set_clientdata(client, NULL);
kfree(menelaus);
return err;
}
@ -1237,8 +1238,8 @@ static int __exit menelaus_remove(struct i2c_client *client)
struct menelaus_chip *menelaus = i2c_get_clientdata(client);
free_irq(client->irq, menelaus);
kfree(menelaus);
i2c_set_clientdata(client, NULL);
kfree(menelaus);
the_menelaus = NULL;
return 0;
}

1
drivers/mfd/pcf50633-core.c
View File

@ -679,6 +679,7 @@ static int __devexit pcf50633_remove(struct i2c_client *client)
for (i = 0; i < PCF50633_NUM_REGULATORS; i++)
platform_device_unregister(pcf->regulator_pdev[i]);
i2c_set_clientdata(client, NULL);
kfree(pcf);
return 0;

2
drivers/mfd/tps65010.c
View File

@ -530,8 +530,8 @@ static int __exit tps65010_remove(struct i2c_client *client)
cancel_delayed_work(&tps->work);
flush_scheduled_work();
debugfs_remove(tps->file);
kfree(tps);
i2c_set_clientdata(client, NULL);
kfree(tps);
the_tps = NULL;
return 0;
}

2
drivers/mfd/wm8350-i2c.c
View File

@ -82,6 +82,7 @@ static int wm8350_i2c_probe(struct i2c_client *i2c,
return ret;
err:
i2c_set_clientdata(i2c, NULL);
kfree(wm8350);
return ret;
}
@ -91,6 +92,7 @@ static int wm8350_i2c_remove(struct i2c_client *i2c)
struct wm8350 *wm8350 = i2c_get_clientdata(i2c);
wm8350_device_exit(wm8350);
i2c_set_clientdata(i2c, NULL);
kfree(wm8350);
return 0;