drm/vmwgfx: Fix a buffer object leak

A buffer object leak was introduced when fixing a premature buffer
object release. Fix this.

Cc: <stable@vger.kernel.org>
Fixes: 73a88250b709 ("Fix a destoy-while-held mutex problem.")
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Deepak Rawat <drawat@vmware.com>
Reviewed-by: Sinclair Yeh <syeh@vmware.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
index aacc9307ab0b..96fd7a03d2f8 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
@@ -2595,6 +2595,7 @@ void vmw_kms_helper_resource_finish(struct vmw_validation_ctx *ctx,
                 vmw_kms_helper_buffer_finish(res->dev_priv, NULL, ctx->buf,
                                              out_fence, NULL);
 
+        vmw_dmabuf_unreference(&ctx->buf);
         vmw_resource_unreserve(res, false, NULL, 0);
         mutex_unlock(&res->dev_priv->cmdbuf_mutex);
 }