linux-kernel - [PATCH 3/3] x86, NMI: Add touch_nmi_watchdog to io_check

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Message-Id: <1294198689-15447-3-git-send-email-dzickus@redhat.com>
Date:	Tue,  4 Jan 2011 22:38:09 -0500
From:	Don Zickus <dzickus@...hat.com>
To:	x86@...nel.org
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Huang Ying <ying.huang@...el.com>,
	Don Zickus <dzickus@...hat.com>
Subject: [PATCH 3/3] 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 bb6f041..c76aaca 100644
--- a/arch/x86/kernel/traps.c
+++ b/arch/x86/kernel/traps.c
@@ -351,9 +351,11 @@ io_check_error(unsigned char reason, struct pt_regs *regs)
 	reason = (reason & 0xf) | 8;
 	outb(reason, 0x61);
 
-	i = 2000;
-	while (--i)
-		udelay(1000);
+	i = 20000;
+	while (--i) {
+		touch_nmi_watchdog();
+		udelay(100);
+	}
 
 	reason &= ~8;
 	outb(reason, 0x61);
-- 
1.7.3.4

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