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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2008-10-30 20:09:44 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-10-30 20:09:44 +0100 |
| commit | d6c3112abe44d7f718bd5aec8ab9469fecff6041 (patch) | |
| tree | 362e826e1e39e6108301893ba35100c8719028b6 /arch/x86 | |
| parent | tty: Fix USB kref leak (diff) | |
| parent | x86/PCI: build failure at x86/kernel/pci-dma.c with !CONFIG_PCI (diff) | |
| download | linux-d6c3112abe44d7f718bd5aec8ab9469fecff6041.tar.xz linux-d6c3112abe44d7f718bd5aec8ab9469fecff6041.zip | |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6:
x86/PCI: build failure at x86/kernel/pci-dma.c with !CONFIG_PCI
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/include/asm/iommu.h | 1 | ||||
| -rw-r--r-- | arch/x86/kernel/pci-dma.c | 16 |
2 files changed, 16 insertions, 1 deletions
diff --git a/arch/x86/include/asm/iommu.h b/arch/x86/include/asm/iommu.h index 98e28ea8cd16..e4a552d44465 100644 --- a/arch/x86/include/asm/iommu.h +++ b/arch/x86/include/asm/iommu.h @@ -7,7 +7,6 @@ extern struct dma_mapping_ops nommu_dma_ops; extern int force_iommu, no_iommu; extern int iommu_detected; extern int dmar_disabled; -extern int forbid_dac; extern unsigned long iommu_nr_pages(unsigned long addr, unsigned long len); diff --git a/arch/x86/kernel/pci-dma.c b/arch/x86/kernel/pci-dma.c index 1972266e8ba5..192624820217 100644 --- a/arch/x86/kernel/pci-dma.c +++ b/arch/x86/kernel/pci-dma.c @@ -9,6 +9,8 @@ #include <asm/calgary.h> #include <asm/amd_iommu.h> +static int forbid_dac __read_mostly; + struct dma_mapping_ops *dma_ops; EXPORT_SYMBOL(dma_ops); @@ -291,3 +293,17 @@ void pci_iommu_shutdown(void) } /* Must execute after PCI subsystem */ fs_initcall(pci_iommu_init); + +#ifdef CONFIG_PCI +/* Many VIA bridges seem to corrupt data for DAC. Disable it here */ + +static __devinit void via_no_dac(struct pci_dev *dev) +{ + if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI && forbid_dac == 0) { + printk(KERN_INFO "PCI: VIA PCI bridge detected." + "Disabling DAC.\n"); + forbid_dac = 1; + } +} +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_ANY_ID, via_no_dac); +#endif |