| Message ID | 1444399652-25920-2-git-send-email-jiang.liu@linux.intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Delegated to: | Bjorn Helgaas |
| Headers | show |
On Fri, Oct 09, 2015 at 10:07:31PM +0800, Jiang Liu wrote: > AMD IOMMU driver makes use of IOMMU PCI devices, so prevent binding other > PCI drivers to IOMMU PCI devices. > > This fixes a bug reported by Boris that system suspend/resume gets broken > on AMD platforms. For more information, please refer to: > https://lkml.org/lkml/2015/9/26/89 > > Fixes: 991de2e59090 ("PCI, x86: Implement pcibios_alloc_irq() and pcibios_free_irq()") > Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> > Cc: Borislav Petkov <bp@alien8.de> Applied to iommu/fixes, thanks Jiang. -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c index 5ef347a13cb5..1b066e7d144d 100644 --- a/drivers/iommu/amd_iommu_init.c +++ b/drivers/iommu/amd_iommu_init.c @@ -1256,6 +1256,9 @@ static int iommu_init_pci(struct amd_iommu *iommu) if (!iommu->dev) return -ENODEV; + /* Prevent binding other PCI device drivers to IOMMU devices */ + iommu->dev->match_driver = false; + pci_read_config_dword(iommu->dev, cap_ptr + MMIO_CAP_HDR_OFFSET, &iommu->cap); pci_read_config_dword(iommu->dev, cap_ptr + MMIO_RANGE_OFFSET,
AMD IOMMU driver makes use of IOMMU PCI devices, so prevent binding other PCI drivers to IOMMU PCI devices. This fixes a bug reported by Boris that system suspend/resume gets broken on AMD platforms. For more information, please refer to: https://lkml.org/lkml/2015/9/26/89 Fixes: 991de2e59090 ("PCI, x86: Implement pcibios_alloc_irq() and pcibios_free_irq()") Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Cc: Borislav Petkov <bp@alien8.de> --- drivers/iommu/amd_iommu_init.c | 3 +++ 1 file changed, 3 insertions(+)