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mlx4_core: Clean up mlx4_alloc_icm() a bit

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Handle the allocation error case first, so that we don't have further
nested if for handling the common case of success.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Roland Dreier 2010-05-20 15:58:22 -07:00
parent c0dc72bad9
commit c050def076
1 changed files with 19 additions and 18 deletions
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37
drivers/net/mlx4/icm.c
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@ -163,29 +163,30 @@ struct mlx4_icm *mlx4_alloc_icm(struct mlx4_dev *dev, int npages,
ret = mlx4_alloc_icm_pages(&chunk->mem[chunk->npages],
cur_order, gfp_mask);
if (!ret) {
++chunk->npages;
if (ret) {
if (--cur_order < 0)
goto fail;
else
continue;
}
if (coherent)
++chunk->nsg;
else if (chunk->npages == MLX4_ICM_CHUNK_LEN) {
chunk->nsg = pci_map_sg(dev->pdev, chunk->mem,
chunk->npages,
PCI_DMA_BIDIRECTIONAL);
++chunk->npages;
if (chunk->nsg <= 0)
goto fail;
}
if (coherent)
++chunk->nsg;
else if (chunk->npages == MLX4_ICM_CHUNK_LEN) {
chunk->nsg = pci_map_sg(dev->pdev, chunk->mem,
chunk->npages,
PCI_DMA_BIDIRECTIONAL);
if (chunk->npages == MLX4_ICM_CHUNK_LEN)
chunk = NULL;
npages -= 1 << cur_order;
} else {
--cur_order;
if (cur_order < 0)
if (chunk->nsg <= 0)
goto fail;
}
if (chunk->npages == MLX4_ICM_CHUNK_LEN)
chunk = NULL;
npages -= 1 << cur_order;
}
if (!coherent && chunk) {