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| author | Guillaume Chazarain <guichaz@yahoo.fr> | 2007-08-16 18:18:53 +0200 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2007-08-24 07:07:30 +0200 |
| commit | e1996a69e162b1c99c3d3802684d1c388b54f47d (patch) | |
| tree | bce0306d79d4b282ecc7629803eda2072ec20321 /drivers/misc/asus-laptop.c | |
| parent | Apply memory policies to top two highest zones when highest zone is ZONE_MOVABLE (diff) | |
| download | linux-e1996a69e162b1c99c3d3802684d1c388b54f47d.tar.xz linux-e1996a69e162b1c99c3d3802684d1c388b54f47d.zip | |
asus-laptop: Fix rmmod of asus_laptop
The asus laptop driver conditionnaly registers leds in asus_led_register()
depending on their availability, but unconditionnaly unregisters them all at
exit time or when the module fails to load. Unregistering not registered leds
result in the following Oops. So we should check before unregistering.
[<c032d2f9>] do_page_fault+0x511/0x5e9
[<c032bae2>] error_code+0x6a/0x70
[<c026abf8>] device_unregister+0x26/0x32
[<f8864218>] led_classdev_unregister+0x58/0x94 [led_class]
[<f88a90f8>] asus_led_exit+0x17/0x41 [asus_laptop]
[<f88a91c9>] asus_laptop_exit+0xd/0x3f [asus_laptop]
[<c013cee1>] sys_delete_module+0x17b/0x1a2
[<c0106eae>] sysenter_past_esp+0x6b/0xa1
EIP: [<c026a9a3>] device_del+0xb/0x23a SS:ESP 0068:f594ef0c
Signed-off-by: Guillaume Chazarain <guichaz@yahoo.fr>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/misc/asus-laptop.c')
| -rw-r--r-- | drivers/misc/asus-laptop.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/misc/asus-laptop.c b/drivers/misc/asus-laptop.c index d0fc4fd212e6..40db9f70148f 100644 --- a/drivers/misc/asus-laptop.c +++ b/drivers/misc/asus-laptop.c @@ -1072,7 +1072,8 @@ static void asus_backlight_exit(void) } #define ASUS_LED_UNREGISTER(object) \ - led_classdev_unregister(&object##_led) + if (object##_led.dev) \ + led_classdev_unregister(&object##_led) static void asus_led_exit(void) { |