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

Segher Boessenkool segher at kernel.crashing.org
Tue Aug 2 22:51:04 AEST 2016


On Tue, Aug 02, 2016 at 10:07:05AM +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
> 
> In that (rare) case the initial csum value has to be rotated one byte
> as well as the resulting value is
> 
> This patch also fixes related comments
> 
> Fixes: 7aef4136566b0 ("powerpc32: rewrite csum_partial_copy_generic()
> based on copy_tofrom_user()")
> Cc: stable at vger.kernel.org
> 
> Signed-off-by: Christophe Leroy <christophe.leroy at c-s.fr>
> ---
>  v2: updated comments as suggested by Segher

This looks good to me now, thanks,


Segher


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