Re: [Xen-devel] [PATCH v2 10/12] xen/iommu: smmu: Check for duplicate stream IDs when registering master devices

[Julien Grall <julien.grall@xxxxxxxxxx>]

On 27/01/15 16:30, Stefano Stabellini wrote:
> On Fri, 16 Jan 2015, Julien Grall wrote:
>> From: Andreas Herrmann <andreas.herrmann@xxxxxxxxxxx>
>>
>> If DT information lists one stream ID twice for the master devices of
>> an SMMU this can cause a multi match when stream ID matching is used.
>> For stream ID indexing this might trigger an overwrite of an S2CR that
>> is already in use.
>>
>> So better check for duplicates when DT information is parsed.
>>
>> Taken from the linux ML:
>> http://lists.infradead.org/pipermail/linux-arm-kernel/2014-January/226099.html
>>
>> Cc: Andreas Herrmann <herrmann.der.user@xxxxxxxxxxxxxx>
>> Signed-off-by: Andreas Herrmann <andreas.herrmann@xxxxxxxxxxx>
>> Signed-off-by: Julien Grall <julien.grall@xxxxxxxxxx>
> 
> Why didn't you just take a more recent version of the Linux smmu driver?

The SMMU driver very is recent (see commit in the previous patch)...
Just this patch has never reached upstream.

Regards,

-- 
Julien Grall

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