nvme: introduce helper function to get ctrl state

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[ Upstream commit 5c687c287c ]

The controller state is typically written by another CPU, so reading it
should ensure no optimizations are taken. This is a repeated pattern in
the driver, so start with adding a convenience function that returns the
controller state with READ_ONCE().

Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Keith Busch 2023-10-30 08:13:09 -07:00 • committed by Greg Kroah-Hartman

parent 8392d32347

commit cc5b051eeb

1 changed files with 5 additions and 0 deletions

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drivers/nvme/host/nvme.h

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