fcntl: return -EFAULT if copy_to_user fails

[safe/jmp/linux-2.6] / lib / swiotlb.c

diff --git a/lib/swiotlb.c b/lib/swiotlb.c
index 5bc0180..a009055 100644 (file)
--- a/lib/swiotlb.c
+++ b/lib/swiotlb.c
@@ -28,6 +28,7 @@
 #include <linux/types.h>
 #include <linux/ctype.h>
 #include <linux/highmem.h>
+#include <linux/gfp.h>
 
 #include <asm/io.h>
 #include <asm/dma.h>
@@ -549,7 +550,7 @@ swiotlb_alloc_coherent(struct device *hwdev, size_t size,
                dma_mask = hwdev->coherent_dma_mask;
 
        ret = (void *)__get_free_pages(flags, order);
-       if (ret && swiotlb_virt_to_bus(hwdev, ret) + size > dma_mask) {
+       if (ret && swiotlb_virt_to_bus(hwdev, ret) + size - 1 > dma_mask) {
                /*
                 * The allocated memory isn't reachable by the device.
                 */
@@ -571,7 +572,7 @@ swiotlb_alloc_coherent(struct device *hwdev, size_t size,
        dev_addr = swiotlb_virt_to_bus(hwdev, ret);
 
        /* Confirm address can be DMA'd by device */
-       if (dev_addr + size > dma_mask) {
+       if (dev_addr + size - 1 > dma_mask) {
                printk("hwdev DMA mask = 0x%016Lx, dev_addr = 0x%016Lx\n",
                       (unsigned long long)dma_mask,
                       (unsigned long long)dev_addr);
@@ -756,37 +757,6 @@ swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr,
 EXPORT_SYMBOL(swiotlb_sync_single_for_device);
 
 /*
- * Same as above, but for a sub-range of the mapping.
- */
-static void
-swiotlb_sync_single_range(struct device *hwdev, dma_addr_t dev_addr,
-                         unsigned long offset, size_t size,
-                         int dir, int target)
-{
-       swiotlb_sync_single(hwdev, dev_addr + offset, size, dir, target);
-}
-
-void
-swiotlb_sync_single_range_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
-                                 unsigned long offset, size_t size,
-                                 enum dma_data_direction dir)
-{
-       swiotlb_sync_single_range(hwdev, dev_addr, offset, size, dir,
-                                 SYNC_FOR_CPU);
-}
-EXPORT_SYMBOL_GPL(swiotlb_sync_single_range_for_cpu);
-
-void
-swiotlb_sync_single_range_for_device(struct device *hwdev, dma_addr_t dev_addr,
-                                    unsigned long offset, size_t size,
-                                    enum dma_data_direction dir)
-{
-       swiotlb_sync_single_range(hwdev, dev_addr, offset, size, dir,
-                                 SYNC_FOR_DEVICE);
-}
-EXPORT_SYMBOL_GPL(swiotlb_sync_single_range_for_device);
-
-/*
  * Map a set of buffers described by scatterlist in streaming mode for DMA.
  * This is the scatter-gather version of the above swiotlb_map_page
  * interface.  Here the scatter gather list elements are each tagged with the