From: Don Fry <pcnet32@verizon.net>
Date: Tue, 6 Mar 2007 02:13:09 +0000 (-0800)
Subject: pcnet32: Fix PCnet32 performance bug on non-coherent architecutres
X-Git-Tag: v2.6.21-rc3~23^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b2cbbd8e0e8093fbf115ac2669482b016d781c78;p=pandora-kernel.git

pcnet32: Fix PCnet32 performance bug on non-coherent architecutres

The PCnet32 driver always passed the the size of the largest possible packet
to the pci_dma_sync_single_for_cpu and pci_dma_sync_single_for_device.
This results in a fairly large "colateral damage" in the caches and makes
the flush operation itself much slower.  On a system with a 40MHz CPU this
patch increases network bandwidth by about 12%.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Acked-by: Don Fry <pcnet32@verizon.net>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---

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