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| author | Christoph Hellwig <hch@lst.de> | 2023-12-26 11:58:41 +0300 |
|---|---|---|
| committer | Keith Busch <kbusch@kernel.org> | 2024-01-03 19:09:40 +0300 |
| commit | d3074e9a73e3c0511f1033b15345e2feb9664b3c (patch) | |
| tree | af12980759820f74aa2516f3db70dfcd62d114af /drivers | |
| parent | 3a96bff229d6e3016805fd6c3dba0655ccba01eb (diff) | |
| download | linux-d3074e9a73e3c0511f1033b15345e2feb9664b3c.tar.xz | |
nvme: update the explanation for not updating the limits in nvme_config_discard
Expeand the comment a bit to explain what is going on.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/nvme/host/core.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index d144d1acb09a..56107cfc97b7 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -1743,7 +1743,13 @@ static void nvme_config_discard(struct nvme_ctrl *ctrl, struct gendisk *disk, queue->limits.discard_granularity = size; - /* If discard is already enabled, don't reset queue limits */ + /* + * If discard is already enabled, don't reset queue limits. + * + * This works around the fact that the block layer can't cope well with + * updating the hardware limits when overridden through sysfs. This is + * harmless because discard limits in NVMe are purely advisory. + */ if (queue->limits.max_discard_sectors) return; |