From: Gavin Shan <gwshan@linux.vnet.ibm.com>
Date: Tue, 15 Jul 2014 07:00:56 +0000 (+1000)
Subject: powerpc/eeh: Fetch IOMMU table in reliable way
X-Git-Tag: omap-for-v3.17/fixes-against-rc2~134^2~25
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a3032ca9f82a588f72130e94b68517b41af31f11;p=pandora-kernel.git

powerpc/eeh: Fetch IOMMU table in reliable way

Function eeh_iommu_group_to_pe() iterates each PCI device to check
the binding IOMMU group with get_iommu_table_base(), which possibly
fetches pdev->dev.archdata.dma_data.dma_offset. It's (0x1 << 59)
for "bypass" cases.

The patch fixes the issue by iterating devices hooked to the IOMMU
group and fetch IOMMU table there.

Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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