diff options
| author | David Woodhouse <dwmw@amazon.co.uk> | 2021-01-05 01:32:51 +0000 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2021-01-05 19:20:21 +0000 |
| commit | 12bc4570c14e24e6244d66466aeda994f805634b (patch) | |
| tree | 6f1a52104a90f9b17c1103390dd2e8f1d5de2626 /drivers | |
| parent | ff2b46d7cff80d27d82f7f3252711f4ca1666129 (diff) | |
iommu/amd: Set iommu->int_enabled consistently when interrupts are set up
When I made the INTCAPXT support stop gratuitously pretending to be MSI,
I missed the fact that iommu_setup_msi() also sets the ->int_enabled
flag. I missed this in the iommu_setup_intcapxt() code path, which means
that a resume from suspend will try to allocate the IRQ domains again,
accidentally re-enabling interrupts as it does, resulting in much sadness.
Lift out the bit which sets iommu->int_enabled into the iommu_init_irq()
function which is also where it gets checked.
Link: https://lore.kernel.org/r/20210104132250.GE32151@zn.tnic/
Fixes: d1adcfbb520c ("iommu/amd: Fix IOMMU interrupt generation in X2APIC mode")
Reported-by: Borislav Petkov <bp@alien8.de>
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Tested-by: Borislav Petkov <bp@suse.de>
Link: https://lore.kernel.org/r/50cd5f55be8ead0937ac315cd2f5b89364f6a9a5.camel@infradead.org
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/iommu/amd/init.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/iommu/amd/init.c b/drivers/iommu/amd/init.c index f54cd79b43e4..6a1f7048dacc 100644 --- a/drivers/iommu/amd/init.c +++ b/drivers/iommu/amd/init.c @@ -1973,8 +1973,6 @@ static int iommu_setup_msi(struct amd_iommu *iommu) return r; } - iommu->int_enabled = true; - return 0; } @@ -2169,6 +2167,7 @@ static int iommu_init_irq(struct amd_iommu *iommu) if (ret) return ret; + iommu->int_enabled = true; enable_faults: iommu_feature_enable(iommu, CONTROL_EVT_INT_EN); |