drm/lima: add __GFP_NOWARN flag to all dma_alloc_wc

This prevent CMA printing dumy "PFNs busy" info which is
caused by alloc fail re-try case.
Reviewed-by: Vasily Khoruzhick <anarsoul@gmail.com>
Signed-off-by: Qiang Yu <yuq825@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191010140152.17747-4-yuq825@gmail.com

drivers/gpu/drm/lima/lima_device.c

@@ -314,7 +314,7 @@ int lima_device_init(struct lima_device *ldev)
 		ldev->va_end = LIMA_VA_RESERVE_START;
 		ldev->dlbu_cpu = dma_alloc_wc(
 			ldev->dev, LIMA_PAGE_SIZE,
-			&ldev->dlbu_dma, GFP_KERNEL);
+			&ldev->dlbu_dma, GFP_KERNEL | __GFP_NOWARN);
 		if (!ldev->dlbu_cpu) {
 			err = -ENOMEM;
 			goto err_out2;

drivers/gpu/drm/lima/lima_vm.c

@@ -56,7 +56,7 @@ static int lima_vm_map_page(struct lima_vm *vm, dma_addr_t pa, u32 va)
 
 		vm->bts[pbe].cpu = dma_alloc_wc(
 			vm->dev->dev, LIMA_PAGE_SIZE << LIMA_VM_NUM_PT_PER_BT_SHIFT,
-			&vm->bts[pbe].dma, GFP_KERNEL | __GFP_ZERO);
+			&vm->bts[pbe].dma, GFP_KERNEL | __GFP_NOWARN | __GFP_ZERO);
 		if (!vm->bts[pbe].cpu)
 			return -ENOMEM;
 
@@ -208,7 +208,7 @@ struct lima_vm *lima_vm_create(struct lima_device *dev)
 	kref_init(&vm->refcount);
 
 	vm->pd.cpu = dma_alloc_wc(dev->dev, LIMA_PAGE_SIZE, &vm->pd.dma,
-				  GFP_KERNEL | __GFP_ZERO);
+				  GFP_KERNEL | __GFP_NOWARN | __GFP_ZERO);
 	if (!vm->pd.cpu)
 		goto err_out0;