linux-kernel - [tip:sched/core] iommu/of: Adjust system

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Date:   Tue, 23 May 2017 01:53:26 -0700
From:   tip-bot for Thomas Gleixner <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     torvalds@...ux-foundation.org, peterz@...radead.org,
        gregkh@...uxfoundation.org, mingo@...nel.org, joro@...tes.org,
        rostedt@...dmis.org, mark.rutland@....com, hpa@...or.com,
        robin.murphy@....com, tglx@...utronix.de,
        linux-kernel@...r.kernel.org
Subject: [tip:sched/core] iommu/of: Adjust system_state check

Commit-ID:  b903dfb277c09e53d499480e9670557dcce36fbd
Gitweb:     http://git.kernel.org/tip/b903dfb277c09e53d499480e9670557dcce36fbd
Author:     Thomas Gleixner <tglx@...utronix.de>
AuthorDate: Tue, 16 May 2017 20:42:42 +0200
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Tue, 23 May 2017 10:01:37 +0200

iommu/of: Adjust system_state check

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 check in of_iommu_driver_present() to handle the
extra states.

Tested-by: Mark Rutland <mark.rutland@....com>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Acked-by: Joerg Roedel <joro@...tes.org>
Acked-by: Robin Murphy <robin.murphy@....com>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Steven Rostedt <rostedt@...dmis.org>
Cc: iommu@...ts.linux-foundation.org
Link: http://lkml.kernel.org/r/20170516184735.788023442@linutronix.de
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 drivers/iommu/of_iommu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iommu/of_iommu.c b/drivers/iommu/of_iommu.c
index 9f44ee8..b8dcf44 100644
--- a/drivers/iommu/of_iommu.c
+++ b/drivers/iommu/of_iommu.c
@@ -103,7 +103,7 @@ static bool of_iommu_driver_present(struct device_node *np)
 	 * it never will be. We don't want to defer indefinitely, nor attempt
 	 * to dereference __iommu_of_table after it's been freed.
 	 */
-	if (system_state > SYSTEM_BOOTING)
+	if (system_state >= SYSTEM_RUNNING)
 		return false;
 
 	return of_match_node(&__iommu_of_table, np);