Messages in this thread | | | Date | Thu, 17 May 2007 23:02:17 +0200 | From | Zoltan Boszormenyi <> | Subject | Re: [PATCH] drivers/ata: Add the SW NCQ support to sata_nv for MCP51/MCP55/MCP61 |
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Hi,
thanks for publishing this.
> Add the Software NCQ support to sata_nv.c for MCP51/MCP55/MCP61 SATA > controller. > > This patch base on sata_nv.c file from kernel 2.6.22-rc1 > > See attachment for the patch. > > Signed-off-by: Kuan Luo <kluo@nvidia.com> > Signed-off-by: Peer Chen <pchen@nvidia.com> > ================================== > See attached file. > ================================== >
However, I saw this in the patch:
+ /* determine if physical DMA addr spans 64K boundary. + * Note h/w doesn't support 64-bit, so we unconditionally + * truncate dma_addr_t to u32. + */ + addr = (u32) sg_dma_address(sg);
Does it mean that I can't upgrade my machine to 4 GB or more without losing NCQ or risking data corruption? Can the code be made IOMMU-aware?
Best regards, Zoltán Böszörményi
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