From cc5b051eeb486eddd2700e9eee07ccccbce71463 Mon Sep 17 00:00:00 2001 From: Keith Busch Date: Mon, 30 Oct 2023 08:13:09 -0700 Subject: [PATCH] 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 Signed-off-by: Keith Busch Signed-off-by: Sasha Levin --- drivers/nvme/host/nvme.h | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h index 74f74b4..13f7146 100644 --- a/drivers/nvme/host/nvme.h +++ b/drivers/nvme/host/nvme.h @@ -391,6 +391,11 @@ struct nvme_ctrl { enum nvme_dctype dctype; }; +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, -- 2.7.4