tree 421e2053f773121ad771298d85b3d7d37f8a6018
parent c94bbfdf516e0ebaf2cb08025174f224c0b391f0
author Thierry Reding <treding@nvidia.com> 1418189125 -0700
committer Tom Warren <twarren@nvidia.com> 1418934101 -0700

net: rtl8169: Properly align buffers

RX and TX descriptor rings should be aligned to 256 byte boundaries. Use
the DEFINE_ALIGN_BUFFER() macro to define the buffers so that they don't
have to be manually aligned later on. Also make sure that the buffers do
align to cache-line boundaries in case the cache-line is higher than the
256 byte alignment requirements of the NIC.

Also add a warning if the cache-line size is larger than the descriptor
size, because the driver may discard changes to descriptors made by the
hardware when requeuing RX buffers.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Warren <twarren@nvidia.com>