From: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Date: Sat, 29 Nov 2008 12:46:27 +0000 (+0100)
Subject: x86: fix dma_mapping_error for 32bit x86
X-Git-Tag: v2.6.28-rc8~58^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7b1dedca42ac0d0d0be01e39d8461bb53a2389b3;p=pandora-kernel.git

x86: fix dma_mapping_error for 32bit x86

Devices like b44 ethernet can't dma from addresses above 1GB. The driver
handles this cases by falling back to GFP_DMA allocation. But for detecting
the problem it needs to get an indication from dma_mapping_error.
The bug is triggered by using a VMSPLIT option of 2G/2G.

Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Acked-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

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