When bo pin failed during modesetting,
vmwgfx would try to unref a non-existing buffer object.
Signed-off-by: Thomas Hellstrom <thellstrom at vmware.com>
---
drivers/gpu/drm/vmwgfx/vmwgfx_kms.c | 5 +++++
1 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
index 87c6e61..cceeb42 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
@@ -720,6 +720,8 @@ static int vmw_surface_dmabuf_pin(struct vmw_framebuffer
*vfb)
&vmw_vram_ne_placement,
false, &vmw_dmabuf_bo_free);
vmw_overlay_resume_all(dev_priv);
+ if (unlikely(ret != 0))
+ vfbs->buffer = NULL;
return ret;
}
@@ -730,6 +732,9 @@ static int vmw_surface_dmabuf_unpin(struct vmw_framebuffer
*vfb)
struct vmw_framebuffer_surface *vfbs =
vmw_framebuffer_to_vfbs(&vfb->base);
+ if (unlikely(vfbs->buffer == NULL))
+ return 0;
+
bo = &vfbs->buffer->base;
ttm_bo_unref(&bo);
vfbs->buffer = NULL;
--
1.6.2.5
