This is a note to let you know that I've just added the patch titled
vdp/mlx5: Fix setting the correct dma_device
to the 5.13-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:
vdp-mlx5-fix-setting-the-correct-dma_device.patch
and it can be found in the queue-5.13 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 92afa2afdb6168c8633b1a89052942ab3baf14c9
Author: Eli Cohen <elic@xxxxxxxxxx>
Date: Sun Jun 6 08:31:50 2021 +0300
vdp/mlx5: Fix setting the correct dma_device
[ Upstream commit 7d23dcdf213c2e5f097eb7eec3148c26eb01d59f ]
Before SF support was introduced, the DMA device was equal to
mdev->device which was in essence equal to pdev->dev.
With SF introduction this is no longer true. It has already been
handled for vhost_vdpa since the reference to the dma device can from
within mlx5_vdpa. With virtio_vdpa this broke. To fix this we set the
real dma device when initializing the device.
In addition, for the sake of consistency, previous references in the
code to the dma device are changed to vdev->dma_dev.
Fixes: d13a15d544ce5 ("vdpa/mlx5: Use the correct dma device when registering memory")
Signed-off-by: Eli Cohen <elic@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20210606053150.170489-1-elic@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 800cfd1967ad..cfa56a58b271 100644
--- a/drivers/vdpa/mlx5/core/mr.c
+++ b/drivers/vdpa/mlx5/core/mr.c
@@ -219,11 +219,6 @@ static void destroy_indirect_key(struct mlx5_vdpa_dev *mvdev, struct mlx5_vdpa_m
mlx5_vdpa_destroy_mkey(mvdev, &mkey->mkey);
}
-static struct device *get_dma_device(struct mlx5_vdpa_dev *mvdev)
-{
- return &mvdev->mdev->pdev->dev;
-}
-
static int map_direct_mr(struct mlx5_vdpa_dev *mvdev, struct mlx5_vdpa_direct_mr *mr,
struct vhost_iotlb *iotlb)
{
@@ -239,7 +234,7 @@ static int map_direct_mr(struct mlx5_vdpa_dev *mvdev, struct mlx5_vdpa_direct_mr
u64 pa;
u64 paend;
struct scatterlist *sg;
- struct device *dma = get_dma_device(mvdev);
+ 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)) {
@@ -298,7 +293,7 @@ err_map:
static void unmap_direct_mr(struct mlx5_vdpa_dev *mvdev, struct mlx5_vdpa_direct_mr *mr)
{
- struct device *dma = get_dma_device(mvdev);
+ struct device *dma = mvdev->vdev.dma_dev;
destroy_direct_mr(mvdev, mr);
dma_unmap_sg_attrs(dma, mr->sg_head.sgl, mr->nsg, DMA_BIDIRECTIONAL, 0);
diff --git a/drivers/vdpa/mlx5/net/mlx5_vnet.c b/drivers/vdpa/mlx5/net/mlx5_vnet.c
index 01eb6c100d2d..2b74e34fbdec 100644
--- a/drivers/vdpa/mlx5/net/mlx5_vnet.c
+++ b/drivers/vdpa/mlx5/net/mlx5_vnet.c
@@ -2032,7 +2032,7 @@ static int mlx5_vdpa_dev_add(struct vdpa_mgmt_dev *v_mdev, const char *name)
goto err_mtu;
}
- mvdev->vdev.dma_dev = mdev->device;
+ mvdev->vdev.dma_dev = &mdev->pdev->dev;
err = mlx5_vdpa_alloc_resources(&ndev->mvdev);
if (err)
goto err_mpfs;
