1 files changed, 19 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/nouveau_sgdma.c b/drivers/gpu/drm/nouveau/nouveau_sgdma.c
index ed1590577b6c..1d6ee8b55154 100644
--- a/drivers/gpu/drm/nouveau/nouveau_sgdma.c
+++ b/drivers/gpu/drm/nouveau/nouveau_sgdma.c
@@ -1,6 +1,7 @@
 #include "drmP.h"
 #include "nouveau_drv.h"
 #include <linux/pagemap.h>
+#include <linux/slab.h>
 
 #define NV_CTXDMA_PAGE_SHIFT 12
 #define NV_CTXDMA_PAGE_SIZE  (1 << NV_CTXDMA_PAGE_SHIFT)
@@ -171,6 +172,24 @@ nouveau_sgdma_unbind(struct ttm_backend *be)
         }
         dev_priv->engine.instmem.finish_access(nvbe->dev);
 
+        if (dev_priv->card_type == NV_50) {
+                nv_wr32(dev, 0x100c80, 0x00050001);
+                if (!nv_wait(0x100c80, 0x00000001, 0x00000000)) {
+                        NV_ERROR(dev, "timeout: (0x100c80 & 1) == 0 (2)\n");
+                        NV_ERROR(dev, "0x100c80 = 0x%08x\n",
+                                                nv_rd32(dev, 0x100c80));
+                        return -EBUSY;
+                }
+
+                nv_wr32(dev, 0x100c80, 0x00000001);
+                if (!nv_wait(0x100c80, 0x00000001, 0x00000000)) {
+                        NV_ERROR(dev, "timeout: (0x100c80 & 1) == 0 (2)\n");
+                        NV_ERROR(dev, "0x100c80 = 0x%08x\n",
+                                                nv_rd32(dev, 0x100c80));
+                        return -EBUSY;
+                }
+        }
+
         nvbe->bound = false;
         return 0;
 }