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[ Upstream commit65946eac6d] There is no error handling for `dma_map_single()` failures. Add error handling by checking `dma_mapping_error()` and freeing the `skb` using `dev_kfree_skb()` (process context) when it fails. Fixes:1da177e4c3("Linux-2.6.12-rc2") Signed-off-by: Yeounsu Moon <yyyynoom@gmail.com> Tested-on: D-Link DGE-550T Rev-A3 Suggested-by: Simon Horman <horms@kernel.org> Reviewed-by: Simon Horman <horms@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Sasha Levin <sashal@kernel.org>