Commit 6eb97593 authored Oct 30, 2023 by Keith Busch Committed by Greg Kroah-Hartman Jan 25, 2024

nvme: introduce helper function to get ctrl state



[ Upstream commit 5c687c287c46fadb14644091823298875a5216aa ]

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>

parent 971c0b10

drivers/nvme/host/nvme.h

+5 −0

Original line number	Diff line number	Diff line
		@@ -292,6 +292,11 @@ struct nvme_ctrl {
		struct nvme_fault_inject fault_inject;
		};

		static inline enum nvme_ctrl_state nvme_ctrl_state(struct nvme_ctrl *ctrl)
		{
		return READ_ONCE(ctrl->state);
		}

		enum nvme_iopolicy {
		NVME_IOPOLICY_NUMA,
		NVME_IOPOLICY_RR,