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author | David S. Miller <davem@davemloft.net> | 2008-12-02 19:50:27 -0800 |
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committer | David S. Miller <davem@davemloft.net> | 2008-12-02 19:50:27 -0800 |
commit | aa2ba5f1082dc705745899584aac8416d710c056 (patch) | |
tree | bde0bf4aff036c6bac19a0212194ae1092afb3c9 /Documentation/DMA-API.txt | |
parent | 68024541e2e5a8f35e281daaa5068a29e2a538a5 (diff) | |
parent | f6f7b52e2f6149d2ee365717afff315b05720162 (diff) | |
download | op-kernel-dev-aa2ba5f1082dc705745899584aac8416d710c056.zip op-kernel-dev-aa2ba5f1082dc705745899584aac8416d710c056.tar.gz |
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
Conflicts:
drivers/net/ixgbe/ixgbe_main.c
drivers/net/smc91x.c
Diffstat (limited to 'Documentation/DMA-API.txt')
-rw-r--r-- | Documentation/DMA-API.txt | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/Documentation/DMA-API.txt b/Documentation/DMA-API.txt index b8e8646..b462bb1 100644 --- a/Documentation/DMA-API.txt +++ b/Documentation/DMA-API.txt @@ -316,12 +316,10 @@ reduce current DMA mapping usage or delay and try again later). pci_map_sg(struct pci_dev *hwdev, struct scatterlist *sg, int nents, int direction) -Maps a scatter gather list from the block layer. - Returns: the number of physical segments mapped (this may be shorter -than <nents> passed in if the block layer determines that some -elements of the scatter/gather list are physically adjacent and thus -may be mapped with a single entry). +than <nents> passed in if some elements of the scatter/gather list are +physically or virtually adjacent and an IOMMU maps them with a single +entry). Please note that the sg cannot be mapped again if it has been mapped once. The mapping process is allowed to destroy information in the sg. |