linux-kernel - [PATCH 2/5] x86, NMI: Add touch_nmi_watchdog to io_check

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Message-Id: <1287195738-3136-3-git-send-email-dzickus@redhat.com>
Date:	Fri, 15 Oct 2010 22:22:15 -0400
From:	Don Zickus <dzickus@...hat.com>
To:	mingo@...e.hu
Cc:	andi@...stfloor.org, robert.richter@....com,
	linux-kernel@...r.kernel.org, peterz@...radead.org,
	ying.huang@...el.com, Don Zickus <dzickus@...hat.com>
Subject: [PATCH 2/5] x86, NMI: Add touch_nmi_watchdog to io_check_error delay

From: Huang Ying <ying.huang@...el.com>

Prevent the long delay in io_check_error making NMI watchdog timeout.

Signed-off-by: Huang Ying <ying.huang@...el.com>
Signed-off-by: Don Zickus <dzickus@...hat.com>
---
 arch/x86/kernel/traps.c |    8 +++++---
 1 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c
index e04e59b..bef859e 100644
--- a/arch/x86/kernel/traps.c
+++ b/arch/x86/kernel/traps.c
@@ -344,9 +344,11 @@ io_check_error(unsigned char reason, struct pt_regs *regs)
 	reason = (reason & NMI_REASON_CLEAR_MASK) | NMI_REASON_CLEAR_IOCHK;
 	outb(reason, NMI_REASON_PORT);
 
-	i = 2000;
-	while (--i)
-		udelay(1000);
+	i = 20000;
+	while (--i) {
+		touch_nmi_watchdog();
+		udelay(100);
+	}
 
 	reason &= ~NMI_REASON_CLEAR_IOCHK;
 	outb(reason, NMI_REASON_PORT);
-- 
1.7.2.3

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