nouveau: use saved fence pointer, not head of unsignalled list

It's possible for the unsignalled list head to change during fence_flush.
Fixes valgrind complaint exposed by a previous commit.

diff --git a/src/gallium/winsys/dri/nouveau/nouveau_fence.c b/src/gallium/winsys/dri/nouveau/nouveau_fence.c
index 7714e6f..e7b0b4f 100644 (file)
--- a/src/gallium/winsys/dri/nouveau/nouveau_fence.c
+++ b/src/gallium/winsys/dri/nouveau/nouveau_fence.c
@@ -172,14 +172,13 @@ nouveau_fence_flush(struct nouveau_channel *chan)
                nvfence = nouveau_fence(nvchan->fence_head);
                if (nvfence->sequence > sequence)
                        break;
-
                nouveau_fence_del_unsignalled(&nvfence->base);
                nvfence->signalled = 1;
 
                if (nvfence->signal_cb) {
                        struct nouveau_fence *fence = NULL;
 
-                       nouveau_fence_ref(nvchan->fence_head, &fence);
+                       nouveau_fence_ref(&nvfence->base, &fence);
 
                        while (nvfence->signal_cb) {
                                struct nouveau_fence_cb *cb;