This is a note to let you know that I've just added the patch titled
vdpa/mlx5: Delete control vq iotlb in destroy_mr only when necessary
to the 6.4-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-delete-control-vq-iotlb-in-destroy_mr-only.patch
and it can be found in the queue-6.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 94808915cfa84891c5bc090de6da7d3027a3c142
Author: Eugenio Pérez <eperezma@xxxxxxxxxx>
Date: Wed Aug 2 20:12:20 2023 +0300
vdpa/mlx5: Delete control vq iotlb in destroy_mr only when necessary
[ Upstream commit ad03a0f44cdb97b46e5c84ed353dac9b8ae2c276 ]
mlx5_vdpa_destroy_mr can be called from .set_map with data ASID after
the control virtqueue ASID iotlb has been populated. The control vq
iotlb must not be cleared, since it will not be populated again.
So call the ASID aware destroy function which makes sure that the
right vq resource is destroyed.
Fixes: 8fcd20c30704 ("vdpa/mlx5: Support different address spaces for control and data")
Signed-off-by: Eugenio Pérez <eperezma@xxxxxxxxxx>
Reviewed-by: Gal Pressman <gal@xxxxxxxxxx>
Message-Id: <20230802171231.11001-5-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/mlx5_vdpa.h b/drivers/vdpa/mlx5/core/mlx5_vdpa.h
index a0420be5059f4..b53420e874acb 100644
--- a/drivers/vdpa/mlx5/core/mlx5_vdpa.h
+++ b/drivers/vdpa/mlx5/core/mlx5_vdpa.h
@@ -122,6 +122,7 @@ int mlx5_vdpa_handle_set_map(struct mlx5_vdpa_dev *mvdev, struct vhost_iotlb *io
int mlx5_vdpa_create_mr(struct mlx5_vdpa_dev *mvdev, struct vhost_iotlb *iotlb,
unsigned int asid);
void mlx5_vdpa_destroy_mr(struct mlx5_vdpa_dev *mvdev);
+void mlx5_vdpa_destroy_mr_asid(struct mlx5_vdpa_dev *mvdev, unsigned int asid);
#define mlx5_vdpa_warn(__dev, format, ...) \
dev_warn((__dev)->mdev->device, "%s:%d:(pid %d) warning: " format, __func__, __LINE__, \
diff --git a/drivers/vdpa/mlx5/core/mr.c b/drivers/vdpa/mlx5/core/mr.c
index 4ae14a248a4bc..5a1971fcd87b1 100644
--- a/drivers/vdpa/mlx5/core/mr.c
+++ b/drivers/vdpa/mlx5/core/mr.c
@@ -515,7 +515,7 @@ static void _mlx5_vdpa_destroy_dvq_mr(struct mlx5_vdpa_dev *mvdev, unsigned int
mr->initialized = false;
}
-static void mlx5_vdpa_destroy_mr_asid(struct mlx5_vdpa_dev *mvdev, unsigned int asid)
+void mlx5_vdpa_destroy_mr_asid(struct mlx5_vdpa_dev *mvdev, unsigned int asid)
{
struct mlx5_vdpa_mr *mr = &mvdev->mr;
diff --git a/drivers/vdpa/mlx5/net/mlx5_vnet.c b/drivers/vdpa/mlx5/net/mlx5_vnet.c
index 279ac6a558d29..f18a9301ab94e 100644
--- a/drivers/vdpa/mlx5/net/mlx5_vnet.c
+++ b/drivers/vdpa/mlx5/net/mlx5_vnet.c
@@ -2564,7 +2564,7 @@ static int mlx5_vdpa_change_map(struct mlx5_vdpa_dev *mvdev,
goto err_mr;
teardown_driver(ndev);
- mlx5_vdpa_destroy_mr(mvdev);
+ mlx5_vdpa_destroy_mr_asid(mvdev, asid);
err = mlx5_vdpa_create_mr(mvdev, iotlb, asid);
if (err)
goto err_mr;
@@ -2580,7 +2580,7 @@ static int mlx5_vdpa_change_map(struct mlx5_vdpa_dev *mvdev,
return 0;
err_setup:
- mlx5_vdpa_destroy_mr(mvdev);
+ mlx5_vdpa_destroy_mr_asid(mvdev, asid);
err_mr:
return err;
}
