Messages in this thread | | | Date | Mon, 25 Sep 2017 08:54:30 -0700 | From | "Raj, Ashok" <> | Subject | Re: DMA error when sg->offset value is greater than PAGE_SIZE in Intel IOMMU |
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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
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