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Groups > linux.kernel > #1642744

[patch V2 10/17] iommu/vt-d: Adjust system_state checks

From Thomas Gleixner <tglx@linutronix.de>
Newsgroups linux.kernel
Subject [patch V2 10/17] iommu/vt-d: Adjust system_state checks
Date 2017-05-16 21:00 +0200
Message-ID <tHPRo-M2-19@gated-at.bofh.it> (permalink)
References <tHPRn-M2-5@gated-at.bofh.it>
Organization linux.* mail to news gateway

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To enable smp_processor_id() and might_sleep() debug checks earlier, it's
required to add system states between SYSTEM_BOOTING and SYSTEM_RUNNING.

Adjust the system_state checks in dmar_parse_one_atsr() and
dmar_iommu_notify_scope_dev() to handle the extra states.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Joerg Roedel <joro@8bytes.org>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: iommu@lists.linux-foundation.org
---
 drivers/iommu/intel-iommu.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -4312,7 +4312,7 @@ int dmar_parse_one_atsr(struct acpi_dmar
 	struct acpi_dmar_atsr *atsr;
 	struct dmar_atsr_unit *atsru;
 
-	if (system_state != SYSTEM_BOOTING && !intel_iommu_enabled)
+	if (system_state >= SYSTEM_RUNNING && !intel_iommu_enabled)
 		return 0;
 
 	atsr = container_of(hdr, struct acpi_dmar_atsr, header);
@@ -4562,7 +4562,7 @@ int dmar_iommu_notify_scope_dev(struct d
 	struct acpi_dmar_atsr *atsr;
 	struct acpi_dmar_reserved_memory *rmrr;
 
-	if (!intel_iommu_enabled && system_state != SYSTEM_BOOTING)
+	if (!intel_iommu_enabled && system_state >= SYSTEM_RUNNING)
 		return 0;
 
 	list_for_each_entry(rmrru, &dmar_rmrr_units, list) {

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[patch V2 10/17] iommu/vt-d: Adjust system_state checks Thomas Gleixner <tglx@linutronix.de> - 2017-05-16 21:00 +0200
  [tip:sched/core] iommu/vt-d: Adjust system_state checks tip-bot for Thomas Gleixner <tipbot@zytor.com> - 2017-05-23 11:00 +0200

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