Messages in this thread Patch in this message | | | From | Joerg Roedel <> | Subject | [PATCH v3.0-stable] iommu/amd: Make sure IOMMU interrupts are re-enabled on resume | Date | Wed, 11 Apr 2012 18:45:52 +0200 |
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commit 9ddd592a191b32f2ee6c4b6ed2bd52665c3a49f5 upstream.
Unfortunatly the interrupts for the event log and the peripheral page-faults are only enabled at boot but not re-enabled at resume. Fix that.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> [bwh: Backport to 3.0: - Drop change to PPR log which was added in 3.3 - Source is under arch/x86/kernel] Signed-off-by: Ben Hutchings <ben@decadent.org.uk> --- arch/x86/kernel/amd_iommu_init.c | 24 +++++++++++++++++------- 1 files changed, 17 insertions(+), 7 deletions(-)
diff --git a/arch/x86/kernel/amd_iommu_init.c b/arch/x86/kernel/amd_iommu_init.c index bfc8453..33df6e8 100644 --- a/arch/x86/kernel/amd_iommu_init.c +++ b/arch/x86/kernel/amd_iommu_init.c @@ -1031,8 +1031,9 @@ static int iommu_setup_msi(struct amd_iommu *iommu) { int r; - if (pci_enable_msi(iommu->dev)) - return 1; + r = pci_enable_msi(iommu->dev); + if (r) + return r; r = request_threaded_irq(iommu->dev->irq, amd_iommu_int_handler, @@ -1042,24 +1043,33 @@ static int iommu_setup_msi(struct amd_iommu *iommu) if (r) { pci_disable_msi(iommu->dev); - return 1; + return r; } iommu->int_enabled = true; - iommu_feature_enable(iommu, CONTROL_EVT_INT_EN); return 0; } static int iommu_init_msi(struct amd_iommu *iommu) { + int ret; + if (iommu->int_enabled) - return 0; + goto enable_faults; if (pci_find_capability(iommu->dev, PCI_CAP_ID_MSI)) - return iommu_setup_msi(iommu); + ret = iommu_setup_msi(iommu); + else + ret = -ENODEV; - return 1; + if (ret) + return ret; + +enable_faults: + iommu_feature_enable(iommu, CONTROL_EVT_INT_EN); + + return 0; } /**************************************************************************** -- 1.7.5.4
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