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drm/ttm: Fix buffer object metadata accounting regression v2 

A regression was introduced in the 3.3 rc series, commit
"drm/ttm: simplify memory accounting for ttm user v2",
causing the metadata of buffer objects created using the ttm_bo_create()
function to be accounted twice.
That causes massive leaks with the vmwgfx driver running for example
SpecViewperf Catia-03 test 2, eventually killing the app.

Furthermore, the same commit introduces a regression where
metadata accounting is leaked if a buffer object is
initialized with an illegal size. This is also fixed with this commit.

v2: Fixed an error path and removed an unused variable.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Jerome Glisse <jglisse@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Thomas Hellstrom 2012-06-12 13:28:42 +02:00 committed by Dave Airlie
parent fe45616805
commit a393c730ab
1 changed files with 3 additions and 10 deletions
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13
drivers/gpu/drm/ttm/ttm_bo.c
View File

@ -1204,6 +1204,7 @@ int ttm_bo_init(struct ttm_bo_device *bdev,
(*destroy)(bo);
else
kfree(bo);
ttm_mem_global_free(mem_glob, acc_size);
return -EINVAL;
}
bo->destroy = destroy;
@ -1307,22 +1308,14 @@ int ttm_bo_create(struct ttm_bo_device *bdev,
struct ttm_buffer_object **p_bo)
{
struct ttm_buffer_object *bo;
struct ttm_mem_global *mem_glob = bdev->glob->mem_glob;
size_t acc_size;
int ret;
acc_size = ttm_bo_acc_size(bdev, size, sizeof(struct ttm_buffer_object));
ret = ttm_mem_global_alloc(mem_glob, acc_size, false, false);
if (unlikely(ret != 0))
return ret;
bo = kzalloc(sizeof(*bo), GFP_KERNEL);
if (unlikely(bo == NULL)) {
ttm_mem_global_free(mem_glob, acc_size);
if (unlikely(bo == NULL))
return -ENOMEM;
}
acc_size = ttm_bo_acc_size(bdev, size, sizeof(struct ttm_buffer_object));
ret = ttm_bo_init(bdev, bo, size, type, placement, page_alignment,
buffer_start, interruptible,
persistent_swap_storage, acc_size, NULL, NULL);