atm: eni: Add check for dma_map_single
[ Upstream commit 0f74b29a ] As the potential failure of the dma_map_single(), it should be better to check it and return error if fails. Fixes: 1da177e4 ("Linux-2.6.12-rc2") Signed-off-by:Jiasheng Jiang <jiasheng@iscas.ac.cn> Signed-off-by:
David S. Miller <davem@davemloft.net> Signed-off-by:
Sasha Levin <sashal@kernel.org>
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b9d5772d
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