[tip:sched/core] iommu/vt-d: Adjust system_state checks

tip-bot for Thomas Gleixner
2017-05-23T08:58:42Z

Commit-ID: b608fe356fe8328665445a26ec75dfac918c8c5d
Gitweb: http://git.kernel.org/tip/b608fe356fe8328665445a26ec75dfac918c8c5d
Author: Thomas Gleixner <tglx@linutronix.de>
AuthorDate: Tue, 16 May 2017 20:42:41 +0200
Committer: Ingo Molnar <mingo@kernel.org>
CommitDate: Tue, 23 May 2017 10:01:36 +0200

iommu/vt-d: Adjust system_state checks

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>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Joerg Roedel <joro@8bytes.org>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: iommu@lists.linux-foundation.org
Link: http://lkml.kernel.org/r/20170516184735.712365947@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
drivers/iommu/intel-iommu.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index fc2765c..8500ded 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -4315,7 +4315,7 @@ int dmar_parse_one_atsr(struct acpi_dmar_header *hdr, void *arg)
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);
@@ -4565,7 +4565,7 @@ int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info)
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) {