ext4: remove redundant goto in ext4_ext_insert_extent()

[karo-tx-linux.git] / lib / swiotlb.c

diff --git a/lib/swiotlb.c b/lib/swiotlb.c
index c47bbe11b804e1aa9e0084eeb73e402cbaea04b9..99093b396145957d52b5e88a183ee1eb9cedeb60 100644 (file)
--- a/lib/swiotlb.c
+++ b/lib/swiotlb.c
@@ -110,6 +110,11 @@ setup_io_tlb_npages(char *str)
 __setup("swiotlb=", setup_io_tlb_npages);
 /* make io_tlb_overflow tunable too? */
 
+unsigned long swioltb_nr_tbl(void)
+{
+       return io_tlb_nslabs;
+}
+
 /* Note that this doesn't work with highmem page */
 static dma_addr_t swiotlb_virt_to_bus(struct device *hwdev,
                                      volatile void *address)
@@ -686,8 +691,10 @@ dma_addr_t swiotlb_map_page(struct device *dev, struct page *page,
        /*
         * Ensure that the address returned is DMA'ble
         */
-       if (!dma_capable(dev, dev_addr, size))
-               panic("map_single: bounce buffer is not DMA'ble");
+       if (!dma_capable(dev, dev_addr, size)) {
+               swiotlb_tbl_unmap_single(dev, map, size, dir);
+               dev_addr = swiotlb_virt_to_bus(dev, io_tlb_overflow_buffer);
+       }
 
        return dev_addr;
 }