[PATCH] net/macb: increase RX buffer size for GEM

From: Nicolas Ferre <redacted>
Date: Mon, 3 Dec 2012 13:15:43 +0100

Macb Ethernet controller requires a RX buffer of 128 bytes. It is
highly sub-optimal for Gigabit-capable GEM that is able to use
a bigger DMA buffer. Change this constant and associated macros
with data stored in the private structure.
I also kept the result of buffers per page calculation to lower the
impact of this move to a variable rx buffer size on rx hot path.
RX DMA buffer size has to be multiple of 64 bytes as indicated in
DMA Configuration Register specification.

Signed-off-by: Nicolas Ferre <redacted>

This looks like it will waste a couple hundred bytes for 1500 MTU
frames, am I right?