linux-kernel - [PATCH 0/3] x86: kill global bad_dma

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Date:	Sun, 15 Nov 2009 21:19:51 +0900
From:	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
To:	linux-kernel@...r.kernel.org
Cc:	mingo@...e.hu, fujita.tomonori@....ntt.co.jp, muli@...ibm.com,
	joerg.roedel@....com
Subject: [PATCH 0/3] x86: kill global bad_dma_address variable

This is against -tip.

This patchset kills bad_dma_address variable, the old mechanism to
enable IOMMU drivers to make dma_mapping_error() work in IOMMU's
specific way.

bad_dma_address variable was introduced to enable IOMMU drivers to
make dma_mapping_error() work in IOMMU's specific way. However, it
can't handle systems that use both swiotlb and HW IOMMU. SO we
introduced dma_map_ops->mapping_error to solve that case.

Keeping those two mechanisms is pointless. Let's remove the old one.

=
 arch/x86/include/asm/dma-mapping.h |    5 +++--
 arch/x86/kernel/amd_iommu.c        |   21 ++++++++++-----------
 arch/x86/kernel/pci-calgary_64.c   |   31 +++++++++++++------------------
 arch/x86/kernel/pci-dma.c          |    3 ---
 arch/x86/kernel/pci-gart_64.c      |   18 +++++++++++++-----
 arch/x86/kernel/pci-nommu.c        |    2 +-
 6 files changed, 40 insertions(+), 40 deletions(-)

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