From: Sinan Kaya <ok...@codeaurora.org>
Current code is assuming that the addresses returned
by dma_alloc_coherent is a logical address. This is
not true on ARM/ARM64 systems. This patch uses
dma_to_phys API to reach to the actual physical address
and then convert to the page pointer.
Signed-off-by: Sinan Kaya <ok...@codeaurora.org>
---
drivers/net/ethernet/mellanox/mlx4/alloc.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlx4/alloc.c
b/drivers/net/ethernet/mellanox/mlx4/alloc.c
index 963dd7e..8eca66a 100644
--- a/drivers/net/ethernet/mellanox/mlx4/alloc.c
+++ b/drivers/net/ethernet/mellanox/mlx4/alloc.c
@@ -634,8 +634,13 @@ int mlx4_buf_alloc(struct mlx4_dev *dev, int size, int
max_direct,
pages = kmalloc(sizeof *pages * buf->nbufs, gfp);
if (!pages)
goto err_free;
- for (i = 0; i < buf->nbufs; ++i)
- pages[i] = virt_to_page(buf->page_list[i].buf);
+ for (i = 0; i < buf->nbufs; ++i) {
+ phys_addr_t phys;
+
+ phys = dma_to_phys(&dev->pdev->dev,
+ buf->page_list[i].map);
+ pages[i] = phys_to_page(phys);
+ }
buf->direct.buf = vmap(pages, buf->nbufs, VM_MAP,
PAGE_KERNEL);
kfree(pages);
if (!buf->direct.buf)
--
Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project.
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