Commit cbbc00be authored Oct 09, 2015 by Jiang Liu Committed by Joerg Roedel Oct 09, 2015

iommu/amd: Prevent binding other PCI drivers to IOMMU PCI devices

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: 991de2e5 ("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>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

parent 02685b1d

drivers/iommu/amd_iommu_init.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -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,