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drm/qxl: add lock asserts to qxl_bo_vmap_locked + qxl_bo_vunmap_locked

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Try avoid re-introducing locking bugs.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: http://patchwork.freedesktop.org/patch/msgid/20210217123213.2199186-12-kraxel@redhat.com
This commit is contained in:
Gerd Hoffmann 2021-02-17 13:32:13 +01:00
parent b4b27f08f9
commit 0345bae177
1 changed files with 4 additions and 0 deletions
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4
drivers/gpu/drm/qxl/qxl_object.c
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@ -162,6 +162,8 @@ int qxl_bo_vmap_locked(struct qxl_bo *bo, struct dma_buf_map *map)
{
int r;
dma_resv_assert_held(bo->tbo.base.resv);
if (bo->kptr) {
bo->map_count++;
goto out;
@ -236,6 +238,8 @@ fallback:
void qxl_bo_vunmap_locked(struct qxl_bo *bo)
{
dma_resv_assert_held(bo->tbo.base.resv);
if (bo->kptr == NULL)
return;
bo->map_count--;