From 1ef0724dbd9c9e6f421a8987f58b8e034da43ec2 Mon Sep 17 00:00:00 2001 From: Thomas Hellstrom Date: Tue, 2 Nov 2010 13:21:49 +0000 Subject: [PATCH] drm/vmwgfx: Fix oops on failing bo pin When bo pin failed during modesetting, vmwgfx would try to unref a non-existing buffer object. Signed-off-by: Thomas Hellstrom Signed-off-by: Dave Airlie --- drivers/gpu/drm/vmwgfx/vmwgfx_kms.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c index 87c6e6156d7d..cceeb42789b6 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;