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drm/virtio: fix resource id handling

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Move virtio_gpu_resource_id_{get,put} to virtgpu_object.c and make them
static.  Allocate and free the id on creation and destroy, drop all
other calls.  That way objects have a valid handle for the whole
lifetime of the object.

Also fixes ids leaking.  Worst offender are dumb buffers, and I think
some error paths too.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Dave Airlie <airlied@redhat.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20181019061847.18958-7-kraxel@redhat.com
This commit is contained in:
Gerd Hoffmann
2018-10-19 08:18:47 +02:00
parent 724cfdfd66
commit 6c1cd97bda
6 changed files with 23 additions and 26 deletions
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23
drivers/gpu/drm/virtio/virtgpu_object.c
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@@ -25,6 +25,26 @@
#include "virtgpu_drv.h"
static void virtio_gpu_resource_id_get(struct virtio_gpu_device *vgdev,
uint32_t *resid)
{
int handle;
idr_preload(GFP_KERNEL);
spin_lock(&vgdev->resource_idr_lock);
handle = idr_alloc(&vgdev->resource_idr, NULL, 1, 0, GFP_NOWAIT);
spin_unlock(&vgdev->resource_idr_lock);
idr_preload_end();
*resid = handle;
}
static void virtio_gpu_resource_id_put(struct virtio_gpu_device *vgdev, uint32_t id)
{
spin_lock(&vgdev->resource_idr_lock);
idr_remove(&vgdev->resource_idr, id);
spin_unlock(&vgdev->resource_idr_lock);
}
static void virtio_gpu_ttm_bo_destroy(struct ttm_buffer_object *tbo)
{
struct virtio_gpu_object *bo;
@@ -40,6 +60,7 @@ static void virtio_gpu_ttm_bo_destroy(struct ttm_buffer_object *tbo)
if (bo->vmap)
virtio_gpu_object_kunmap(bo);
drm_gem_object_release(&bo->gem_base);
virtio_gpu_resource_id_put(vgdev, bo->hw_res_handle);
kfree(bo);
}
@@ -81,9 +102,11 @@ int virtio_gpu_object_create(struct virtio_gpu_device *vgdev,
bo = kzalloc(sizeof(struct virtio_gpu_object), GFP_KERNEL);
if (bo == NULL)
return -ENOMEM;
virtio_gpu_resource_id_get(vgdev, &bo->hw_res_handle);
size = roundup(size, PAGE_SIZE);
ret = drm_gem_object_init(vgdev->ddev, &bo->gem_base, size);
if (ret != 0) {
virtio_gpu_resource_id_put(vgdev, bo->hw_res_handle);
kfree(bo);
return ret;
}