From: Divy Le Ray <divy@chelsio.com>
Date: Thu, 28 May 2009 11:23:02 +0000 (+0000)
Subject: cxgb3: fix dma mapping regression
X-Git-Tag: v2.6.30-rc8~9^2~8
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=10b6d95612672f89deb39b5a60fb677c78ba4844;p=pandora-kernel.git

cxgb3: fix dma mapping regression

Commit 5e68b772e6efd189d6aca76f6872fb75d51ace60
  cxgb3: map entire Rx page, feed map+offset to Rx ring.

introduced a regression on platforms defining DECLARE_PCI_UNMAP_ADDR()
and related macros as no-ops.

Rx descriptors are fed with the a page buffer bus address + page chunk offset.
The page buffer bus address is set and retrieved through
pci_unamp_addr_set(), pci_unmap_addr().
These functions being meaningless on x86 (if CONFIG_DMA_API_DEBUG is not set).
The HW ends up with a bogus bus address.

This patch saves the page buffer bus address for all plaftorms.

Signed-off-by: Divy Le Ray <divy@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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