From: Krzysztof Halasa <khc@pm.waw.pl>
Date: Tue, 14 Jul 2009 11:01:54 +0000 (+0000)
Subject: E100: work around the driver using streaming DMA mapping for RX descriptors.
X-Git-Tag: v2.6.27.29~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4662e31e5b9ae9ad4e0422c97ed9c757ac6d678f;p=pandora-kernel.git

E100: work around the driver using streaming DMA mapping for RX descriptors.

[ Upstream commit 303d67c288319768b19ed8dbed429fef7eb7c275 ]

E100 places it's RX packet descriptors inside skb->data and uses them
with bidirectional streaming DMA mapping. Unfortunately it fails to
transfer skb->data ownership to the device after it reads the
descriptor's status, breaking on non-coherent (e.g., ARM) platforms.

This have to be converted to use coherent memory for the descriptors.

Signed-off-by: Krzysztof Halasa <khc@pm.waw.pl>
Acked-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

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