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The driver forgets to destroy workqueue in remove() similarly to what is done when probe() fails. Add a call to destroy_workqueue() to fix it. Since unregistration will wait for the work to finish, we do not need to cancel/flush the work instance in remove(). Signed-off-by: Chuhong Yuan <hslester96@gmail.com> Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20191114023405.31477-1-hslester96@gmail.com Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>