diff options
| author | Joerg Roedel <joerg.roedel@amd.com> | 2012-03-15 16:29:47 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-04-02 10:32:08 -0700 |
| commit | e01f0322c7dad6c79157b84439537bc1306a2ac3 (patch) | |
| tree | 70b5446b67c1e99691856dd3fd4a4c1d0b8023db /drivers | |
| parent | ae8000857757d9ae51149e324f5c64edd1b64b1c (diff) | |
| download | lwn-e01f0322c7dad6c79157b84439537bc1306a2ac3.tar.gz lwn-e01f0322c7dad6c79157b84439537bc1306a2ac3.zip | |
iommu/amd: Make sure IOMMU interrupts are re-enabled on resume
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/iommu/amd_iommu_init.c | 30 |
1 files changed, 20 insertions, 10 deletions
diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c index a35e98ad9725..c94a16597691 100644 --- a/drivers/iommu/amd_iommu_init.c +++ b/drivers/iommu/amd_iommu_init.c @@ -1131,8 +1131,9 @@ 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, @@ -1142,27 +1143,36 @@ 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); - - if (iommu->ppr_log != NULL) - iommu_feature_enable(iommu, CONTROL_PPFINT_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); + + if (iommu->ppr_log != NULL) + iommu_feature_enable(iommu, CONTROL_PPFINT_EN); + + return 0; } /**************************************************************************** |