[UTOPIC] [PULL] UBUNTU: fix Occasional crash in APM xgene enet driver

[Tim Gardner]

On 06/16/2015 08:42 PM, Ming Lei wrote:
> Hi Guys,
>
> The 3 patches in below tree fixed one crash in APM xgene enet
> driver, please pull that:
>
>          git://kernel.ubuntu.com/ming/ubuntu-utopic.git   arm64-net-backport
>
> Buglink:
>               http://bugs.launchpad.net/bugs/1425576
>
> 0129e83 drivers: net: xgene: fix: Out of order descriptor bytes read
> b53da50 arch: Add lightweight memory barriers dma_rmb() and dma_wmb()
> 5f34c79 arch: Cleanup read_barrier_depends() and comments
>
> Thanks,
> Ming
>

Ming - those 2 arch patches are messing with some seriously fundamental 
behaviours. Wouldn't it be much safer to just open code the barrier in 
the xgene enet driver ? I am quite reluctant to merge a patch that 
affects every architecture and could have very subtle side effects.

rtg
-- 
Tim Gardner tim.gardner at canonical.com