[PATCH v2] powerpc/32: fix csum_partial_copy_generic()

Michael Ellerman mpe at ellerman.id.au
Fri Aug 5 19:38:23 AEST 2016

Christophe Leroy <christophe.leroy at c-s.fr> writes:

> Le 05/08/2016 à 08:57, Michael Ellerman a écrit :
>> Alessio Igor Bogani <alessio.bogani at elettra.eu> writes:
>>> On 4 August 2016 at 05:53, Scott Wood <oss at buserror.net> wrote:
>>>> On Tue, 2016-08-02 at 10:07 +0200, Christophe Leroy wrote:
>>>>> commit 7aef4136566b0 ("powerpc32: rewrite csum_partial_copy_generic()
>>>>> based on copy_tofrom_user()") introduced a bug when destination
>>>>> address is odd and initial csum is not null
> The purpose of this patch was not to address Alessio's issue, but to fix 
> a huge issue on checksum calculation which induces breakdown of TCP 
> connections.
> I think it is worth commiting it upstream and on impacted stable 
> releases, allthought we don't have yet identified the issue Alessio's has.

OK. I'll put it back into fixes on Monday if I haven't heard anything


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