diff options
| author | <hch@lst.de> | 2005-04-17 15:26:13 -0500 |
|---|---|---|
| committer | James Bottomley <jejb@titanic> | 2005-04-18 13:49:58 -0500 |
| commit | be7db055dd7261522557046370f49160728e3847 (patch) | |
| tree | 314689dfb551ee9ad5ef8c27576762489a51897d /Documentation/DMA-mapping.txt | |
| parent | 80e2ca3dcb1043420ac4b06de8eed3d6fedaddda (diff) | |
| download | lwn-be7db055dd7261522557046370f49160728e3847.tar.gz lwn-be7db055dd7261522557046370f49160728e3847.zip | |
[PATCH] remove old scsi data direction macros
these have been wrappers for the generic dma direction bits since 2.5.x.
This patch converts the few remaining drivers and removes the macros.
Arjan noticed there's some hunk in here that shouldn't. Updated patch
below:
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'Documentation/DMA-mapping.txt')
| -rw-r--r-- | Documentation/DMA-mapping.txt | 12 |
1 files changed, 3 insertions, 9 deletions
diff --git a/Documentation/DMA-mapping.txt b/Documentation/DMA-mapping.txt index f4ac37f157ea..684557474c15 100644 --- a/Documentation/DMA-mapping.txt +++ b/Documentation/DMA-mapping.txt @@ -443,15 +443,9 @@ Only streaming mappings specify a direction, consistent mappings implicitly have a direction attribute setting of PCI_DMA_BIDIRECTIONAL. -The SCSI subsystem provides mechanisms for you to easily obtain -the direction to use, in the SCSI command: - - scsi_to_pci_dma_dir(SCSI_DIRECTION) - -Where SCSI_DIRECTION is obtained from the 'sc_data_direction' -member of the SCSI command your driver is working on. The -mentioned interface above returns a value suitable for passing -into the streaming DMA mapping interfaces below. +The SCSI subsystem tells you the direction to use in the +'sc_data_direction' member of the SCSI command your driver is +working on. For Networking drivers, it's a rather simple affair. For transmit packets, map/unmap them with the PCI_DMA_TODEVICE direction |