tree ef6e639ca906f07528d43d629441c84d0f947b97
parent 4c75f877853cfa81b12374a07208e07b077f39b8
author Keith Busch <kbusch@kernel.org> 1567613171 -0600
committer Keith Busch <kbusch@kernel.org> 1571062920 +0900

nvme: Wait for reset state when required

Prevent simultaneous controller disabling/enabling tasks from interfering
with each other through a function to wait until the task successfully
transitioned the controller to the RESETTING state. This ensures disabling
the controller will not be interrupted by another reset path, otherwise
a concurrent reset may leave the controller in the wrong state.

Tested-by: Edmund Nadolski <edmund.nadolski@intel.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>