af169f4dd5
Prevent race conditions, when an interrupt-queue underrun occurred and the controller is currently working on our queue head or a transfer is still in progress. Change-Id: Ia14f80a08071306ee5d1349780be081bfacb206a Signed-off-by: Nico Huber <nico.huber@secunet.com> Reviewed-on: http://review.coreboot.org/1902 Reviewed-by: Patrick Georgi <patrick@georgi-clan.de> Tested-by: build bot (Jenkins)