diff options
| author | Thayumanavar Sachithanantham <thayumk@gmail.com> | 2006-04-20 16:00:56 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2006-05-01 12:03:42 -0700 |
| commit | f1e64a332ce7e00d5e5fa25e505e54dff3049ddc (patch) | |
| tree | abb70a05e0c73c6f1d6cdac49f05aedcc51d1132 | |
| parent | e3c7674c8c029d59b060ce1e41e40f3efec49a85 (diff) | |
[PATCH] cs5535_gpio.c: call cdev_del() during module_exit to unmap kobject references and other cleanups
During module unloading, cdev_del() must be called to unmap cdev related
kobject references and other cleanups(such as inode->i_cdev being set to
NULL) which prevents the OOPS upon subsequent loading, usage and unloading
of modules(as seen in the mail thread
http://marc.theaimsgroup.com/?l=linux-kernel&m=114533640609018&w=2).
Also, remove unneeded test of gpio_base.
Signed-off-by: Thayumanavar Sachithanantham <thayumk@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | drivers/char/cs5535_gpio.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/char/cs5535_gpio.c b/drivers/char/cs5535_gpio.c index 5d72f50de1ac..46d66037b917 100644 --- a/drivers/char/cs5535_gpio.c +++ b/drivers/char/cs5535_gpio.c @@ -241,9 +241,10 @@ static int __init cs5535_gpio_init(void) static void __exit cs5535_gpio_cleanup(void) { dev_t dev_id = MKDEV(major, 0); + + cdev_del(&cs5535_gpio_cdev); unregister_chrdev_region(dev_id, CS5535_GPIO_COUNT); - if (gpio_base != 0) - release_region(gpio_base, CS5535_GPIO_SIZE); + release_region(gpio_base, CS5535_GPIO_SIZE); } module_init(cs5535_gpio_init); |