diff options
| author |   Roland Dreier <rolandd@cisco.com> | 2010-05-20 15:58:22 -0700 |
|---|---|---|
| committer | Roland Dreier <rolandd@cisco.com> | 2010-05-20 15:58:22 -0700 |
| commit | c050def076bfbc4513ee961c77fde6ba3d401158 (patch) | |
| tree | b5c6e4a7a192eea51e587a10a5bb1a627290ff4a /drivers/net/mlx4 | |
| parent | mlx4_core: Fix possible chunk sg list overflow in mlx4_alloc_icm() (diff) | |
| download | linux-dev-c050def076bfbc4513ee961c77fde6ba3d401158.tar.xz linux-dev-c050def076bfbc4513ee961c77fde6ba3d401158.zip | |
mlx4_core: Clean up mlx4_alloc_icm() a bit
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>
Diffstat (limited to 'drivers/net/mlx4')
| -rw-r--r-- | drivers/net/mlx4/icm.c | 39 |
1 files changed, 20 insertions, 19 deletions
diff --git a/drivers/net/mlx4/icm.c b/drivers/net/mlx4/icm.c index ef62f1749b8a..b07e4dee80aa 100644 --- a/drivers/net/mlx4/icm.c +++ b/drivers/net/mlx4/icm.c @@ -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 (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->nsg <= 0) - goto fail; - } + if (ret) { + if (--cur_order < 0) + goto fail; + else + continue; + } - if (chunk->npages == MLX4_ICM_CHUNK_LEN) - chunk = NULL; + ++chunk->npages; - npages -= 1 << cur_order; - } else { - --cur_order; - if (cur_order < 0) + 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->nsg <= 0) goto fail; } + + if (chunk->npages == MLX4_ICM_CHUNK_LEN) + chunk = NULL; + + npages -= 1 << cur_order; } if (!coherent && chunk) { |