From 4ec8f58d042d7fe0dab570fed35a438759645ca8 Mon Sep 17 00:00:00 2001 From: Keith Packard Date: Thu, 6 Dec 2007 15:12:21 -0800 Subject: i915: wait for buffer idle before writing relocations When writing a relocation entry, make sure the target buffer is idle, otherwise the GPU may see inconsistent data. --- shared-core/i915_dma.c | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'shared-core/i915_dma.c') diff --git a/shared-core/i915_dma.c b/shared-core/i915_dma.c index 090ac80a..18d2482e 100644 --- a/shared-core/i915_dma.c +++ b/shared-core/i915_dma.c @@ -751,6 +751,13 @@ int i915_apply_reloc(struct drm_file *file_priv, int num_buffers, !drm_bo_same_page(relocatee->offset, new_cmd_offset)) { drm_bo_kunmap(&relocatee->kmap); relocatee->offset = new_cmd_offset; + mutex_lock (&relocatee->buf->mutex); + ret = drm_bo_wait (relocatee->buf, 0, 0, FALSE); + mutex_unlock (&relocatee->buf->mutex); + if (ret) { + DRM_ERROR("Could not wait for buffer to apply relocs\n %08lx", new_cmd_offset); + return ret; + } ret = drm_bo_kmap(relocatee->buf, new_cmd_offset >> PAGE_SHIFT, 1, &relocatee->kmap); if (ret) { -- cgit v1.2.3