linux-kernel - [patch] Fix hpet wrong values

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Message-ID: <20071127122308.GA2640@elf.ucw.cz>
Date:	Tue, 27 Nov 2007 13:23:08 +0100
From:	Pavel Machek <pavel@....cz>
To:	Thomas Gleixner <tglx@...utronix.de>,
	kernel list <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...e.hu>, Andrew Morton <akpm@...l.org>
Subject: [patch] Fix hpet wrong values

If hpet is not enabled in config, its init should not pretend to work,
and people should not try to get time from it. 

Signed-off-by: Pavel Machek <pavel@...e.cz>

diff --git a/include/asm-x86/hpet.h b/include/asm-x86/hpet.h
index b1f3c1e..1777d68 100644
--- a/include/asm-x86/hpet.h
+++ b/include/asm-x86/hpet.h
@@ -81,8 +81,8 @@ #endif /* CONFIG_HPET_EMULATE_RTC */
 
 #else
 
-static inline int hpet_enable(void) { return 0; }
-static inline unsigned long hpet_readl(unsigned long a) { return 0; }
+static inline int hpet_enable(void) { return -ENODEV; }
+static inline unsigned long hpet_readl(unsigned long a) { BUG(); }
 
 #endif /* CONFIG_HPET_TIMER */
 #endif /* ASM_X86_HPET_H */

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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