We should never start a transmission after the queue has been stopped. But because it might work we don't kill the function here but rather warn loudly the user that something is wrong. Set a flag when the queue should remain stopped. Reset this flag when the queue actually gets restarded. Just check this value to know if a transmission is legitimate, warn if it is not. Turn the flags variable into an unsigned long to allow the use of atomic helpers on it. Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Acked-by: Alexander Aring <aahringo@redhat.com> Link: https://lore.kernel.org/r/20220519150516.443078-11-miquel.raynal@bootlin.com Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org>