On Mon, Feb 13, 2012 at 3:53 PM, Ming Lei <tom.leiming at gmail.com> wrote: > Looks 'sysfs_lock' needn't to be held for unregister, so the patch below may > fix the problem. Looks correct to me! Acked-by: Linus Walleij <linus.walleij at linaro.org> Thanks, Linus Walleij