Revert "ttm: Include the 'struct dev' when using the DMA API."

This reverts commit 5a893fc28f0393adb7c885a871b8c59e623fd528.

This causes a use after free in the ttm free alloc pages path,
when it tries to get the be after the be has been destroyed.

Signed-off-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/nouveau/nouveau_mem.c

@@ -409,7 +409,6 @@ nouveau_mem_vram_init(struct drm_device *dev)
 	if (ret)
 		return ret;
 
-	dev_priv->ttm.bdev.dev = dev->dev;
 	ret = ttm_bo_device_init(&dev_priv->ttm.bdev,
 				 dev_priv->ttm.bo_global_ref.ref.object,
 				 &nouveau_bo_driver, DRM_FILE_PAGE_OFFSET,

drivers/gpu/drm/radeon/radeon_ttm.c

@@ -513,7 +513,6 @@ int radeon_ttm_init(struct radeon_device *rdev)
 	if (r) {
 		return r;
 	}
-	rdev->mman.bdev.dev = rdev->dev;
 	/* No others user of address space so set it to 0 */
 	r = ttm_bo_device_init(&rdev->mman.bdev,
 			       rdev->mman.bo_global_ref.ref.object,

drivers/gpu/drm/ttm/ttm_page_alloc.c

@@ -664,7 +664,7 @@ out:
  */
 int ttm_get_pages(struct list_head *pages, int flags,
 		  enum ttm_caching_state cstate, unsigned count,
-		  dma_addr_t *dma_address, struct device *dev)
+		  dma_addr_t *dma_address)
 {
 	struct ttm_page_pool *pool = ttm_get_pool(flags, cstate);
 	struct page *p = NULL;
@@ -685,7 +685,7 @@ int ttm_get_pages(struct list_head *pages, int flags,
 		for (r = 0; r < count; ++r) {
 			if ((flags & TTM_PAGE_FLAG_DMA32) && dma_address) {
 				void *addr;
-				addr = dma_alloc_coherent(dev, PAGE_SIZE,
+				addr = dma_alloc_coherent(NULL, PAGE_SIZE,
 							  &dma_address[r],
 							  gfp_flags);
 				if (addr == NULL)
@@ -730,7 +730,7 @@ int ttm_get_pages(struct list_head *pages, int flags,
 			printk(KERN_ERR TTM_PFX
 			       "Failed to allocate extra pages "
 			       "for large request.");
-			ttm_put_pages(pages, 0, flags, cstate, NULL, NULL);
+			ttm_put_pages(pages, 0, flags, cstate, NULL);
 			return r;
 		}
 	}
@@ -741,8 +741,7 @@ int ttm_get_pages(struct list_head *pages, int flags,
 
 /* Put all pages in pages list to correct pool to wait for reuse */
 void ttm_put_pages(struct list_head *pages, unsigned page_count, int flags,
-		   enum ttm_caching_state cstate, dma_addr_t *dma_address,
-		   struct device *dev)
+		   enum ttm_caching_state cstate, dma_addr_t *dma_address)
 {
 	unsigned long irq_flags;
 	struct ttm_page_pool *pool = ttm_get_pool(flags, cstate);
@@ -758,7 +757,7 @@ void ttm_put_pages(struct list_head *pages, unsigned page_count, int flags,
 				void *addr = page_address(p);
 				WARN_ON(!addr || !dma_address[r]);
 				if (addr)
-					dma_free_coherent(dev, PAGE_SIZE,
+					dma_free_coherent(NULL, PAGE_SIZE,
 							  addr,
 							  dma_address[r]);
 				dma_address[r] = 0;

drivers/gpu/drm/ttm/ttm_tt.c

@@ -110,7 +110,7 @@ static struct page *__ttm_tt_get_page(struct ttm_tt *ttm, int index)
 		INIT_LIST_HEAD(&h);
 
 		ret = ttm_get_pages(&h, ttm->page_flags, ttm->caching_state, 1,
-				    &ttm->dma_address[index], ttm->be->bdev->dev);
+				    &ttm->dma_address[index]);
 
 		if (ret != 0)
 			return NULL;
@@ -304,7 +304,7 @@ static void ttm_tt_free_alloced_pages(struct ttm_tt *ttm)
 		}
 	}
 	ttm_put_pages(&h, count, ttm->page_flags, ttm->caching_state,
-		      ttm->dma_address, ttm->be->bdev->dev);
+		      ttm->dma_address);
 	ttm->state = tt_unpopulated;
 	ttm->first_himem_page = ttm->num_pages;
 	ttm->last_lomem_page = -1;

drivers/gpu/drm/vmwgfx/vmwgfx_drv.c

@@ -322,7 +322,7 @@ static int vmw_driver_load(struct drm_device *dev, unsigned long chipset)
 	ttm_lock_set_kill(&dev_priv->fbdev_master.lock, false, SIGTERM);
 	dev_priv->active_master = &dev_priv->fbdev_master;
 
-	dev_priv->bdev.dev = dev->dev;
+
 	ret = ttm_bo_device_init(&dev_priv->bdev,
 				 dev_priv->bo_global_ref.ref.object,
 				 &vmw_bo_driver, VMWGFX_FILE_PAGE_OFFSET,

include/drm/ttm/ttm_bo_driver.h

@@ -551,7 +551,6 @@ struct ttm_bo_device {
 	struct list_head device_list;
 	struct ttm_bo_global *glob;
 	struct ttm_bo_driver *driver;
-	struct device *dev;
 	rwlock_t vm_lock;
 	struct ttm_mem_type_manager man[TTM_NUM_MEM_TYPES];
 	spinlock_t fence_lock;

include/drm/ttm/ttm_page_alloc.h

@@ -37,14 +37,12 @@
  * @cstate: ttm caching state for the page.
  * @count: number of pages to allocate.
  * @dma_address: The DMA (bus) address of pages (if TTM_PAGE_FLAG_DMA32 set).
- * @dev: struct device for appropiate DMA accounting.
  */
 int ttm_get_pages(struct list_head *pages,
 		  int flags,
 		  enum ttm_caching_state cstate,
 		  unsigned count,
-		  dma_addr_t *dma_address,
-		  struct device *dev);
+		  dma_addr_t *dma_address);
 /**
  * Put linked list of pages to pool.
  *
@@ -54,14 +52,12 @@ int ttm_get_pages(struct list_head *pages,
  * @flags: ttm flags for page allocation.
  * @cstate: ttm caching state.
  * @dma_address: The DMA (bus) address of pages (if TTM_PAGE_FLAG_DMA32 set).
- * @dev: struct device for appropiate DMA accounting.
  */
 void ttm_put_pages(struct list_head *pages,
 		   unsigned page_count,
 		   int flags,
 		   enum ttm_caching_state cstate,
-		   dma_addr_t *dma_address,
-		   struct device *dev);
+		   dma_addr_t *dma_address);
 /**
  * Initialize pool allocator.
  */