Keith Busch 87c3207781 NVMe: Fix reset/remove race ... This fixes a scenario where device is present and being reset, but a request to unbind the driver occurs. A previous patch series addressing a device failure removal scenario flushed reset_work after controller disable to unblock reset_work waiting on a completion that wouldn't occur. This isn't safe as-is. The broken scenario can potentially be induced with: modprobe nvme && modprobe -r nvme To fix, the reset work is flushed immediately after setting the controller removing flag, and any subsequent reset will not proceed with controller initialization if the flag is set. The controller status must be polled while active, so the watchdog timer is also left active until the controller is disabled to cleanup requests that may be stuck during namespace removal. [Fixes: ff23a2a15a] Signed-off-by: Keith Busch <keith.busch@intel.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: Jens Axboe <axboe@fb.com>		2016-05-03 14:00:29 -06:00
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host	NVMe: Fix reset/remove race	2016-05-03 14:00:29 -06:00
Kconfig	nvme: move to a new drivers/nvme/host directory	2015-10-09 10:40:37 -06:00
Makefile	nvme: move to a new drivers/nvme/host directory	2015-10-09 10:40:37 -06:00