Hardware may temporarily stop processing commands that have been dispatched to it while activating new firmware. Some target implementation's paused state time exceeds the default request expiry, so any request dispatched before the driver could quiesce for the hardware's paused state will time out, and handling this may interrupt the firmware activation.
This two-part series provides a way for drivers to reset dispatched requests' timeout deadline, then uses this new mechanism from the nvme driver's fw activation work. Keith Busch (2): blk-mq: provide way to reset rq timeouts nvme: reset request timeouts during fw activation block/blk-mq.c | 30 ++++++++++++++++++++++++++++++ drivers/nvme/host/core.c | 20 ++++++++++++++++++++ include/linux/blk-mq.h | 1 + 3 files changed, 51 insertions(+) -- 2.14.4
