From e727f5cde90d5a8b92a1ffa49c636a3790301469 Mon Sep 17 00:00:00 2001
From: Roland Dreier <rolandd@cisco.com>
Date: Mon, 22 Jun 2009 23:07:56 -0700
Subject: [PATCH] mlx4_core: Fix dma_sync_single_for_cpu() with matching
for_device() calls
Commit 5d23a1d2 ("net: replace dma_sync_single with
dma_sync_single_for_cpu") replaced uses of the deprectated function
dma_sync_single() with calls to dma_sync_single_for_cpu(). However,
to be correct, the code should do a sync for_cpu() before touching the
memory and for_device() after it's done.
Signed-off-by: Roland Dreier <rolandd@cisco.com>
---
drivers/net/mlx4/mr.c | 14 ++++++++++----
1 file changed, 10 insertions(+), 4 deletions(-)
diff --git a/drivers/net/mlx4/mr.c b/drivers/net/mlx4/mr.c
index 5887e4764d220..f96948be0a449 100644
--- a/drivers/net/mlx4/mr.c
+++ b/drivers/net/mlx4/mr.c
@@ -399,11 +399,14 @@ static int mlx4_write_mtt_chunk(struct mlx4_dev *dev, struct mlx4_mtt *mtt,
if (!mtts)
return -ENOMEM;
+ dma_sync_single_for_cpu(&dev->pdev->dev, dma_handle,
+ npages * sizeof (u64), DMA_TO_DEVICE);
+
for (i = 0; i < npages; ++i)
mtts[i] = cpu_to_be64(page_list[i] | MLX4_MTT_FLAG_PRESENT);
- dma_sync_single_for_cpu(&dev->pdev->dev, dma_handle,
- npages * sizeof (u64), DMA_TO_DEVICE);
+ dma_sync_single_for_device(&dev->pdev->dev, dma_handle,
+ npages * sizeof (u64), DMA_TO_DEVICE);
return 0;
}
@@ -547,11 +550,14 @@ int mlx4_map_phys_fmr(struct mlx4_dev *dev, struct mlx4_fmr *fmr, u64 *page_list
/* Make sure MPT status is visible before writing MTT entries */
wmb();
+ dma_sync_single_for_cpu(&dev->pdev->dev, fmr->dma_handle,
+ npages * sizeof(u64), DMA_TO_DEVICE);
+
for (i = 0; i < npages; ++i)
fmr->mtts[i] = cpu_to_be64(page_list[i] | MLX4_MTT_FLAG_PRESENT);
- dma_sync_single_for_cpu(&dev->pdev->dev, fmr->dma_handle,
- npages * sizeof(u64), DMA_TO_DEVICE);
+ dma_sync_single_for_device(&dev->pdev->dev, fmr->dma_handle,
+ npages * sizeof(u64), DMA_TO_DEVICE);
fmr->mpt->key = cpu_to_be32(key);
fmr->mpt->lkey = cpu_to_be32(key);
--
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