This is a note to let you know that I've just added the patch titled
vdpa/mlx5: Fix suboptimal range on iotlb iteration
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
vdpa-mlx5-fix-suboptimal-range-on-iotlb-iteration.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 91066f474c6a1b07ea622bfcd0af997387c372c9
Author: Si-Wei Liu <si-wei.liu@xxxxxxxxxx>
Date: Mon Oct 21 16:40:40 2024 +0300
vdpa/mlx5: Fix suboptimal range on iotlb iteration
[ Upstream commit 35025963326e44d8bced3eecd42d2f040f4f0024 ]
The starting iova address to iterate iotlb map entry within a range
was set to an irrelevant value when passing to the itree_next()
iterator, although luckily it doesn't affect the outcome of finding
out the granule of the smallest iotlb map size. Fix the code to make
it consistent with the following for-loop.
Fixes: 94abbccdf291 ("vdpa/mlx5: Add shared memory registration code")
Signed-off-by: Si-Wei Liu <si-wei.liu@xxxxxxxxxx>
Signed-off-by: Dragos Tatulea <dtatulea@xxxxxxxxxx>
Message-Id: <20241021134040.975221-3-dtatulea@xxxxxxxxxx>
Signed-off-by: Michael S. Tsirkin <mst@xxxxxxxxxx>
Acked-by: Jason Wang <jasowang@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/vdpa/mlx5/core/mr.c b/drivers/vdpa/mlx5/core/mr.c
index 8b21f564678c9..32ce1a6aae0d2 100644
--- a/drivers/vdpa/mlx5/core/mr.c
+++ b/drivers/vdpa/mlx5/core/mr.c
@@ -227,7 +227,6 @@ static int map_direct_mr(struct mlx5_vdpa_dev *mvdev, struct mlx5_vdpa_direct_mr
unsigned long lgcd = 0;
int log_entity_size;
unsigned long size;
- u64 start = 0;
int err;
struct page *pg;
unsigned int nsg;
@@ -238,10 +237,9 @@ static int map_direct_mr(struct mlx5_vdpa_dev *mvdev, struct mlx5_vdpa_direct_mr
struct device *dma = mvdev->vdev.dma_dev;
for (map = vhost_iotlb_itree_first(iotlb, mr->start, mr->end - 1);
- map; map = vhost_iotlb_itree_next(map, start, mr->end - 1)) {
+ map; map = vhost_iotlb_itree_next(map, mr->start, mr->end - 1)) {
size = maplen(map, mr);
lgcd = gcd(lgcd, size);
- start += size;
}
log_entity_size = ilog2(lgcd);
