lkml.org 
[lkml]   [2007]   [May]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] drivers/ata: Add the SW NCQ support to sata_nv for MCP51/MCP55/MCP61
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

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2007-05-17 23:05    [W:0.030 / U:0.632 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site