1 files changed, 33 insertions, 16 deletions

diff --git a/drivers/net/mlx4/alloc.c b/drivers/net/mlx4/alloc.c
index b226e019bc8b..75ef9d0d974d 100644
--- a/drivers/net/mlx4/alloc.c
+++ b/drivers/net/mlx4/alloc.c
@@ -34,6 +34,7 @@
 #include <linux/slab.h>
 #include <linux/bitmap.h>
 #include <linux/dma-mapping.h>
+#include <linux/vmalloc.h>
 
 #include "mlx4.h"
 
@@ -116,40 +117,53 @@ int mlx4_buf_alloc(struct mlx4_dev *dev, int size, int max_direct,
 		buf->nbufs        = 1;
 		buf->npages       = 1;
 		buf->page_shift   = get_order(size) + PAGE_SHIFT;
-		buf->u.direct.buf = dma_alloc_coherent(&dev->pdev->dev,
+		buf->direct.buf   = dma_alloc_coherent(&dev->pdev->dev,
 						       size, &t, GFP_KERNEL);
-		if (!buf->u.direct.buf)
+		if (!buf->direct.buf)
 			return -ENOMEM;
 
-		buf->u.direct.map = t;
+		buf->direct.map = t;
 
 		while (t & ((1 << buf->page_shift) - 1)) {
 			--buf->page_shift;
 			buf->npages *= 2;
 		}
 
-		memset(buf->u.direct.buf, 0, size);
+		memset(buf->direct.buf, 0, size);
 	} else {
 		int i;
 
 		buf->nbufs       = (size + PAGE_SIZE - 1) / PAGE_SIZE;
 		buf->npages      = buf->nbufs;
 		buf->page_shift  = PAGE_SHIFT;
-		buf->u.page_list = kzalloc(buf->nbufs * sizeof *buf->u.page_list,
+		buf->page_list   = kzalloc(buf->nbufs * sizeof *buf->page_list,
 					   GFP_KERNEL);
-		if (!buf->u.page_list)
+		if (!buf->page_list)
 			return -ENOMEM;
 
 		for (i = 0; i < buf->nbufs; ++i) {
-			buf->u.page_list[i].buf =
+			buf->page_list[i].buf =
 				dma_alloc_coherent(&dev->pdev->dev, PAGE_SIZE,
 						   &t, GFP_KERNEL);
-			if (!buf->u.page_list[i].buf)
+			if (!buf->page_list[i].buf)
 				goto err_free;
 
-			buf->u.page_list[i].map = t;
+			buf->page_list[i].map = t;
 
-			memset(buf->u.page_list[i].buf, 0, PAGE_SIZE);
+			memset(buf->page_list[i].buf, 0, PAGE_SIZE);
+		}
+
+		if (BITS_PER_LONG == 64) {
+			struct page **pages;
+			pages = kmalloc(sizeof *pages * buf->nbufs, GFP_KERNEL);
+			if (!pages)
+				goto err_free;
+			for (i = 0; i < buf->nbufs; ++i)
+				pages[i] = virt_to_page(buf->page_list[i].buf);
+			buf->direct.buf = vmap(pages, buf->nbufs, VM_MAP, PAGE_KERNEL);
+			kfree(pages);
+			if (!buf->direct.buf)
+				goto err_free;
 		}
 	}
 
@@ -167,15 +181,18 @@ void mlx4_buf_free(struct mlx4_dev *dev, int size, struct mlx4_buf *buf)
 	int i;
 
 	if (buf->nbufs == 1)
-		dma_free_coherent(&dev->pdev->dev, size, buf->u.direct.buf,
-				  buf->u.direct.map);
+		dma_free_coherent(&dev->pdev->dev, size, buf->direct.buf,
+				  buf->direct.map);
 	else {
+		if (BITS_PER_LONG == 64)
+			vunmap(buf->direct.buf);
+
 		for (i = 0; i < buf->nbufs; ++i)
-			if (buf->u.page_list[i].buf)
+			if (buf->page_list[i].buf)
 				dma_free_coherent(&dev->pdev->dev, PAGE_SIZE,
-						  buf->u.page_list[i].buf,
-						  buf->u.page_list[i].map);
-		kfree(buf->u.page_list);
+						  buf->page_list[i].buf,
+						  buf->page_list[i].map);
+		kfree(buf->page_list);
 	}
 }
 EXPORT_SYMBOL_GPL(mlx4_buf_free);