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| author | Keith Busch <kbusch@kernel.org> | 2023-10-30 18:13:09 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-01-20 13:51:41 +0300 |
| commit | cc5b051eeb486eddd2700e9eee07ccccbce71463 (patch) | |
| tree | f17d0e22545a59dacd8d894588d6dcaa0c43e4b9 | |
| parent | 8392d323472116d3ea430657fc66de51698a010d (diff) | |
| download | linux-cc5b051eeb486eddd2700e9eee07ccccbce71463.tar.xz | |
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>
| -rw-r--r-- | drivers/nvme/host/nvme.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h index 74f74b459f5f..13f71461f5f1 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, |