linux-kernel - [tip:x86/debug] x86/nmi: Fix timeout test in test_nmi

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Date:   Tue, 20 Jun 2017 06:28:00 -0700
From:   tip-bot for Dan Carpenter <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     dzickus@...hat.com, dan.carpenter@...cle.com, peterz@...radead.org,
        tglx@...utronix.de, mingo@...nel.org, hpa@...or.com,
        linux-kernel@...r.kernel.org, torvalds@...ux-foundation.org
Subject: [tip:x86/debug] x86/nmi: Fix timeout test in test_nmi_ipi()

Commit-ID:  c133c7615751008f6c32ccae7cdfc5ff6e989c35
Gitweb:     http://git.kernel.org/tip/c133c7615751008f6c32ccae7cdfc5ff6e989c35
Author:     Dan Carpenter <dan.carpenter@...cle.com>
AuthorDate: Mon, 19 Jun 2017 13:53:04 +0300
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Tue, 20 Jun 2017 12:52:43 +0200

x86/nmi: Fix timeout test in test_nmi_ipi()

We're supposed to exit the loop with "timeout" set to zero.

Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
Acked-by: Don Zickus <dzickus@...hat.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: kernel-janitors@...r.kernel.org
Fixes: 99e8b9ca90d6 ("x86, NMI: Add NMI IPI selftest")
Link: http://lkml.kernel.org/r/20170619105304.GA23995@elgon.mountain
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 arch/x86/kernel/nmi_selftest.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kernel/nmi_selftest.c b/arch/x86/kernel/nmi_selftest.c
index 6d9582e..d27f8d8 100644
--- a/arch/x86/kernel/nmi_selftest.c
+++ b/arch/x86/kernel/nmi_selftest.c
@@ -78,7 +78,7 @@ static void __init test_nmi_ipi(struct cpumask *mask)
 
 	/* Don't wait longer than a second */
 	timeout = USEC_PER_SEC;
-	while (!cpumask_empty(mask) && timeout--)
+	while (!cpumask_empty(mask) && --timeout)
 	        udelay(1);
 
 	/* What happens if we timeout, do we still unregister?? */