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drm: Assert that BO is locked in drm_gem_vram_{pin, unpin}_locked()

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We may not call drm_gem_vram_{pin,unpin}_locked() with an unlocked
BO. Now test for this.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20190521110831.20200-4-tzimmermann@suse.de
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Thomas Zimmermann 2019-05-21 13:08:31 +02:00 committed by Gerd Hoffmann
parent cb1f8814bb
commit 9977e5b437
1 changed files with 4 additions and 0 deletions
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4
drivers/gpu/drm/drm_gem_vram_helper.c
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@ -284,6 +284,8 @@ int drm_gem_vram_pin_locked(struct drm_gem_vram_object *gbo,
int i, ret;
struct ttm_operation_ctx ctx = { false, false };
lockdep_assert_held(&gbo->bo.resv->lock.base);
if (gbo->pin_count) {
++gbo->pin_count;
return 0;
@ -361,6 +363,8 @@ int drm_gem_vram_unpin_locked(struct drm_gem_vram_object *gbo)
int i, ret;
struct ttm_operation_ctx ctx = { false, false };
lockdep_assert_held(&gbo->bo.resv->lock.base);
if (WARN_ON_ONCE(!gbo->pin_count))
return 0;