From: Jon Cooper <jcooper@solarflare.com>
Date: Mon, 2 Sep 2013 17:24:29 +0000 (+0100)
Subject: sfc: Use TX PIO for sufficiently small packets
X-Git-Tag: v3.13-rc1~105^2~341^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ee45fd92c739;p=pandora-kernel.git

sfc: Use TX PIO for sufficiently small packets

Sufficiently small linear packets can be copied into the PIO buffer
with a single call to memcpy_toio().  Non-linear packets require an
intermediate cache-line-sized buffer.

[bwh: I wrote the first version of this, but Jon did the hard work to
 handle non-linear packets.]
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
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