]> git.proxmox.com Git - mirror_ubuntu-disco-kernel.git/commit
powerpc/32: Fix again csum_partial_copy_generic()
authorChristophe Leroy <christophe.leroy@c-s.fr>
Fri, 26 Aug 2016 14:45:13 +0000 (16:45 +0200)
committerMichael Ellerman <mpe@ellerman.id.au>
Thu, 8 Sep 2016 03:15:02 +0000 (13:15 +1000)
commit8540571e01f973d321b0821f4f32ed6e9ae8263c
tree21d05b8003d5c0e1f893b5dfc613d7347540f5a9
parentcaa58f808834fca9a4443233fd09df5ab639690d
powerpc/32: Fix again csum_partial_copy_generic()

Commit 7aef4136566b0 ("powerpc32: rewrite csum_partial_copy_generic()
based on copy_tofrom_user()") introduced a bug when destination address
is odd and len is lower than cacheline size.

In that case the resulting csum value doesn't have to be rotated one
byte because the cache-aligned copy part is skipped so no alignment
is performed.

Fixes: 7aef4136566b0 ("powerpc32: rewrite csum_partial_copy_generic() based on copy_tofrom_user()")
Cc: stable@vger.kernel.org # v4.6+
Reported-by: Alessio Igor Bogani <alessio.bogani@elettra.eu>
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Tested-by: Alessio Igor Bogani <alessio.bogani@elettra.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
arch/powerpc/lib/checksum_32.S