lkml.org 
[lkml]   [2017]   [Sep]   [25]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: DMA error when sg->offset value is greater than PAGE_SIZE in Intel IOMMU
Hi Casey

Sorry, somehow didn't see this one come by.


On Mon, Sep 25, 2017 at 05:46:40PM +0000, Casey Leedom wrote:
> | From: Robin Murphy <robin.murphy@arm.com>
> | Sent: Wednesday, September 20, 2017 3:12 AM
> |
> | On 20/09/17 09:01, Herbert Xu wrote:
> | >
> | > Harsh Jain <Harsh@chelsio.com> wrote:
> | >>
> | >> While debugging DMA mapping error in chelsio crypto driver we
> | >> observed that when scatter/gather list received by driver has
> | >> some entry with page->offset > 4096 (PAGE_SIZE). It starts
> | >> giving DMA error. Without IOMMU it works fine.

Not sure how the page->offset would end up being greater than page-size?

If you have additional traces, please send them by.

Is this a new driver? wondering how we didn't run into this?


Cheers,
Ashok

\
 
 \ /
  Last update: 2017-09-25 20:40    [W:0.162 / U:0.096 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site