3.8.13.7 -stable review patch.  If anyone has any objections, please let me 
know.

------------------

From: Maarten Lankhorst <[email protected]>

commit 7a7da592cbb22a1d360638dbecc393470c5effe3 upstream.

Fixes some dmabuf object errors on nv50 chipset and below.

Signed-off-by: Maarten Lankhorst <[email protected]>
Signed-off-by: Ben Skeggs <[email protected]>
[ kamal: backport to 3.8 ]
Signed-off-by: Kamal Mostafa <[email protected]>
---
 drivers/gpu/drm/nouveau/nv10_fence.c |  2 +-
 drivers/gpu/drm/nouveau/nv50_fence.c | 14 +++++++++-----
 2 files changed, 10 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/nv10_fence.c 
b/drivers/gpu/drm/nouveau/nv10_fence.c
index 03017f2..4f1d5d3 100644
--- a/drivers/gpu/drm/nouveau/nv10_fence.c
+++ b/drivers/gpu/drm/nouveau/nv10_fence.c
@@ -132,7 +132,7 @@ nv10_fence_context_new(struct nouveau_channel *chan)
                struct ttm_mem_reg *mem = &priv->bo->bo.mem;
                struct nouveau_object *object;
                u32 start = mem->start * PAGE_SIZE;
-               u32 limit = mem->start + mem->size - 1;
+               u32 limit = start + mem->size - 1;
 
                ret = nouveau_object_new(nv_object(chan->cli), chan->handle,
                                         NvSema, 0x0002,
diff --git a/drivers/gpu/drm/nouveau/nv50_fence.c 
b/drivers/gpu/drm/nouveau/nv50_fence.c
index d889f3a..923c7ef 100644
--- a/drivers/gpu/drm/nouveau/nv50_fence.c
+++ b/drivers/gpu/drm/nouveau/nv50_fence.c
@@ -50,6 +50,8 @@ nv50_fence_context_new(struct nouveau_channel *chan)
        struct nv50_fence_chan *fctx;
        struct ttm_mem_reg *mem = &priv->bo->bo.mem;
        struct nouveau_object *object;
+       u32 start = mem->start * PAGE_SIZE;
+       u32 limit = start + mem->size - 1;
        int ret, i;
 
        fctx = chan->fence = kzalloc(sizeof(*fctx), GFP_KERNEL);
@@ -59,26 +61,28 @@ nv50_fence_context_new(struct nouveau_channel *chan)
        nouveau_fence_context_new(&fctx->base);
 
        ret = nouveau_object_new(nv_object(chan->cli), chan->handle,
-                                NvSema, 0x0002,
+                                NvSema, 0x003d,
                                 &(struct nv_dma_class) {
                                        .flags = NV_DMA_TARGET_VRAM |
                                                 NV_DMA_ACCESS_RDWR,
-                                       .start = mem->start * PAGE_SIZE,
-                                       .limit = mem->size - 1,
+                                       .start = start,
+                                       .limit = limit,
                                 }, sizeof(struct nv_dma_class),
                                 &object);
 
        /* dma objects for display sync channel semaphore blocks */
        for (i = 0; !ret && i < dev->mode_config.num_crtc; i++) {
                struct nouveau_bo *bo = nv50_display_crtc_sema(dev, i);
+               u32 start = bo->bo.mem.start * PAGE_SIZE;
+               u32 limit = start + bo->bo.mem.size - 1;
 
                ret = nouveau_object_new(nv_object(chan->cli), chan->handle,
                                         NvEvoSema0 + i, 0x003d,
                                         &(struct nv_dma_class) {
                                                .flags = NV_DMA_TARGET_VRAM |
                                                         NV_DMA_ACCESS_RDWR,
-                                               .start = bo->bo.offset,
-                                               .limit = bo->bo.offset + 0xfff,
+                                               .start = start,
+                                               .limit = limit,
                                         }, sizeof(struct nv_dma_class),
                                         &object);
        }
-- 
1.8.1.2

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