Messages in this thread Patch in this message | | | Date | Thu, 27 Apr 2006 17:16:39 -0700 | From | Greg KH <> | Subject | [patch 02/24] cs5535_gpio.c: call cdev_del() during module_exit to unmap kobject references and other cleanups |
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-stable review patch. If anyone has any objections, please let us know.
------------------ From: Thayumanavar Sachithanantham <thayumk@gmail.com>
[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>
--- drivers/char/cs5535_gpio.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
--- linux-2.6.16.11.orig/drivers/char/cs5535_gpio.c +++ linux-2.6.16.11/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); -- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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