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hp_accel: fix race in device removal

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The work queue has to be flushed after the device has been made
inaccessible.  The patch closes a window during which a work queue might
remain active after the device is removed and would then lead to ACPI
calls with undefined behavior.

Signed-off-by: Oliver Neukum <[email protected]>
Acked-by: Eric Piel <[email protected]>
Acked-by: Pavel Machek <[email protected]>
Cc: Pavel Herrmann <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Oliver Neukum 2010-05-11 14:07:03 -07:00 • committed by Linus Torvalds
commit 06efbeb4a4
1 changed files with 1 additions and 1 deletions
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2
drivers/hwmon/hp_accel.c
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@ -328,8 +328,8 @@ static int lis3lv02d_remove(struct acpi_device *device, int type)
lis3lv02d_joystick_disable();
lis3lv02d_poweroff(&lis3_dev);
flush_work(&hpled_led.work);
led_classdev_unregister(&hpled_led.led_classdev);
flush_work(&hpled_led.work);
return lis3lv02d_remove_fs(&lis3_dev);
}