This ports Herbert Xu's "maybe_stop_tx" code and removes the tx_lock
which is not needed.
Signed-off-by: NAyyappan Veeraiyan <ayyappan.veeraiyan@intel.com>
Signed-off-by: NAuke Kok <auke-jan.h.kok@intel.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>