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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>
wifi-calibration
Roland Dreier 2009-06-22 23:07:56 -07:00
parent 65795efbd3
commit e727f5cde9
1 changed files with 10 additions and 4 deletions
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14
drivers/net/mlx4/mr.c
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@ -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);