From: Eric Dumazet <eric.duma...@gmail.com>
Date: Wed, 18 Jan 2017 19:44:42 -0800
> From: Eric Dumazet <eduma...@google.com>
>
> A driver using dev_alloc_page() must not reuse a page that had to
> use emergency memory reserve.
>
> Otherwise all packets using this page will be immediately dropped,
> unless for very specific sockets having SOCK_MEMALLOC bit set.
>
> This issue might be hard to debug, because only a fraction of the RX
> ring buffer would suffer from drops.
>
> Fixes: 75354148ce69 ("gianfar: Add paged allocation and Rx S/G")
> Signed-off-by: Eric Dumazet <eduma...@google.com>
Applied.
