Date: Wed, 21 Aug 2024 15:24:01 GMT From: Konstantin Belousov <kib@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: 45543d3424d4 - main - DMAR: clear dmar_devs[unit] if attach failed Message-ID: <202408211524.47LFO1qT070205@gitrepo.freebsd.org>
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The branch main has been updated by kib: URL: https://cgit.FreeBSD.org/src/commit/?id=45543d3424d46f84a5399879e190fc359dcefbd4 commit 45543d3424d46f84a5399879e190fc359dcefbd4 Author: Konstantin Belousov <kib@FreeBSD.org> AuthorDate: 2024-08-20 14:41:33 +0000 Commit: Konstantin Belousov <kib@FreeBSD.org> CommitDate: 2024-08-21 15:23:07 +0000 DMAR: clear dmar_devs[unit] if attach failed This should stop attempts to use a unit which was not completely initialized, but referenced by ACPI DMAR table during scoped devices operions. PR: 280817 Sponsored by: Advanced Micro Devices (AMD) Sponsored by: The FreeBSD Foundation MFC after: 1 week Differential revision: https://reviews.freebsd.org/D46382 --- sys/x86/iommu/intel_drv.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/sys/x86/iommu/intel_drv.c b/sys/x86/iommu/intel_drv.c index 0b25620114cd..636534173715 100644 --- a/sys/x86/iommu/intel_drv.c +++ b/sys/x86/iommu/intel_drv.c @@ -422,6 +422,7 @@ dmar_attach(device_t dev) &unit->reg_rid, RF_ACTIVE); if (unit->regs == NULL) { device_printf(dev, "cannot allocate register window\n"); + dmar_devs[unit->iommu.unit] = NULL; return (ENOMEM); } unit->hw_ver = dmar_read4(unit, DMAR_VER_REG); @@ -449,6 +450,7 @@ dmar_attach(device_t dev) error = dmar_alloc_irq(dev, unit, DMAR_INTR_FAULT); if (error != 0) { dmar_release_resources(dev, unit); + dmar_devs[unit->iommu.unit] = NULL; return (error); } if (DMAR_HAS_QI(unit)) { @@ -463,6 +465,7 @@ dmar_attach(device_t dev) error = dmar_alloc_irq(dev, unit, DMAR_INTR_QI); if (error != 0) { dmar_release_resources(dev, unit); + dmar_devs[unit->iommu.unit] = NULL; return (error); } } @@ -496,12 +499,14 @@ dmar_attach(device_t dev) if (error != 0) { DMAR_UNLOCK(unit); dmar_release_resources(dev, unit); + dmar_devs[unit->iommu.unit] = NULL; return (error); } error = dmar_inv_ctx_glob(unit); if (error != 0) { DMAR_UNLOCK(unit); dmar_release_resources(dev, unit); + dmar_devs[unit->iommu.unit] = NULL; return (error); } if ((unit->hw_ecap & DMAR_ECAP_DI) != 0) { @@ -509,6 +514,7 @@ dmar_attach(device_t dev) if (error != 0) { DMAR_UNLOCK(unit); dmar_release_resources(dev, unit); + dmar_devs[unit->iommu.unit] = NULL; return (error); } } @@ -517,16 +523,19 @@ dmar_attach(device_t dev) error = dmar_init_fault_log(unit); if (error != 0) { dmar_release_resources(dev, unit); + dmar_devs[unit->iommu.unit] = NULL; return (error); } error = dmar_init_qi(unit); if (error != 0) { dmar_release_resources(dev, unit); + dmar_devs[unit->iommu.unit] = NULL; return (error); } error = dmar_init_irt(unit); if (error != 0) { dmar_release_resources(dev, unit); + dmar_devs[unit->iommu.unit] = NULL; return (error); } @@ -542,6 +551,7 @@ dmar_attach(device_t dev) error = iommu_init_busdma(&unit->iommu); if (error != 0) { dmar_release_resources(dev, unit); + dmar_devs[unit->iommu.unit] = NULL; return (error); } @@ -551,6 +561,7 @@ dmar_attach(device_t dev) if (error != 0) { DMAR_UNLOCK(unit); dmar_release_resources(dev, unit); + dmar_devs[unit->iommu.unit] = NULL; return (error); } DMAR_UNLOCK(unit);
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