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net/mlx4: Remove BUG_ON from ICM allocation routine

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[ Upstream commit c1d5f8ff80 ]

This patch removes BUG_ON() macro from mlx4_alloc_icm_coherent()
by checking DMA address alignment in advance and performing proper
folding in case of error.

Fixes: 5b0bf5e25e ("mlx4_core: Support ICM tables in coherent memory")
Reported-by: Ozgur Karatas <okaratas@member.fsf.org>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Leon Romanovsky 2016-12-29 18:37:11 +02:00 committed by Greg Kroah-Hartman
parent 3865040045
commit cbc80312fd
1 changed files with 6 additions and 1 deletions
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7
drivers/net/ethernet/mellanox/mlx4/icm.c
View File

@ -118,8 +118,13 @@ static int mlx4_alloc_icm_coherent(struct device *dev, struct scatterlist *mem,
if (!buf)
return -ENOMEM;
if (offset_in_page(buf)) {
dma_free_coherent(dev, PAGE_SIZE << order,
buf, sg_dma_address(mem));
return -ENOMEM;
}
sg_set_buf(mem, buf, PAGE_SIZE << order);
BUG_ON(mem->offset);
sg_dma_len(mem) = PAGE_SIZE << order;
return 0;
}