swiotlb-xen: add struct device * parameter to xen_dma_sync_for_device

No functional changes. The parameter is unused in this patch but will be
used by next patches.

Signed-off-by: Stefano Stabellini <stefano.stabellini@xilinx.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Tested-by: Corey Minyard <cminyard@mvista.com>
Tested-by: Roman Shaposhnik <roman@zededa.com>
Link: https://lore.kernel.org/r/20200710223427.6897-6-sstabellini@kernel.org
Signed-off-by: Juergen Gross <jgross@suse.com>

arch/arm/xen/mm.c

@@ -81,8 +81,9 @@ void xen_dma_sync_for_cpu(struct device *dev, dma_addr_t handle,
 		dma_cache_maint(handle, size, GNTTAB_CACHE_INVAL);
 }
 
-void xen_dma_sync_for_device(dma_addr_t handle, phys_addr_t paddr, size_t size,
-		enum dma_data_direction dir)
+void xen_dma_sync_for_device(struct device *dev, dma_addr_t handle,
+			     phys_addr_t paddr, size_t size,
+			     enum dma_data_direction dir)
 {
 	if (pfn_valid(PFN_DOWN(handle)))
 		arch_sync_dma_for_device(paddr, size, dir);

drivers/xen/swiotlb-xen.c

@@ -408,7 +408,7 @@ static dma_addr_t xen_swiotlb_map_page(struct device *dev, struct page *page,
 
 done:
 	if (!dev_is_dma_coherent(dev) && !(attrs & DMA_ATTR_SKIP_CPU_SYNC))
-		xen_dma_sync_for_device(dev_addr, phys, size, dir);
+		xen_dma_sync_for_device(dev, dev_addr, phys, size, dir);
 	return dev_addr;
 }
 
@@ -458,7 +458,7 @@ xen_swiotlb_sync_single_for_device(struct device *dev, dma_addr_t dma_addr,
 		swiotlb_tbl_sync_single(dev, paddr, size, dir, SYNC_FOR_DEVICE);
 
 	if (!dev_is_dma_coherent(dev))
-		xen_dma_sync_for_device(dma_addr, paddr, size, dir);
+		xen_dma_sync_for_device(dev, dma_addr, paddr, size, dir);
 }
 
 /*

include/xen/swiotlb-xen.h

@@ -7,8 +7,9 @@
 void xen_dma_sync_for_cpu(struct device *dev, dma_addr_t handle,
 			  phys_addr_t paddr, size_t size,
 			  enum dma_data_direction dir);
-void xen_dma_sync_for_device(dma_addr_t handle, phys_addr_t paddr, size_t size,
-		enum dma_data_direction dir);
+void xen_dma_sync_for_device(struct device *dev, dma_addr_t handle,
+			     phys_addr_t paddr, size_t size,
+			     enum dma_data_direction dir);
 
 extern int xen_swiotlb_init(int verbose, bool early);
 extern const struct dma_map_ops xen_swiotlb_dma_ops;