netdev - r6040: bad udelay call, build failure on ARM with R6040=m

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Message-ID: <20080825120502.GA13700@deprecation.cyrius.com>
Date:	Mon, 25 Aug 2008 15:05:02 +0300
From:	Martin Michlmayr <tbm@...ius.com>
To:	Florian Fainelli <florian.fainelli@...ecomint.eu>,
	Sten Wang <sten.wang@....com.tw>
Cc:	netdev@...r.kernel.org
Subject: r6040: bad udelay call, build failure on ARM with R6040=m

r6040 fails to build on ARM with:

ERROR: "__bad_udelay" [drivers/net/r6040.ko] undefined!
make[1]: *** [__modpost] Error 1

__bad_udelay is specifically designed on ARM to fail when udelay is
called in a bad way.  arch/arm/include/asm/delay.h has this to say
about __bad_udelay:

/*
 * This function intentionally does not exist; if you see references to
 * it, it means that you're calling udelay() with an out of range value.
 *
 * With currently imposed limits, this means that we support a max delay
 * of 2000us. Further limits: HZ<=1000 and bogomips<=3355
 */
extern void __bad_udelay(void);

Can you check why your driver is calling udelay() with a value > 2000?

-- 
Martin Michlmayr
http://www.cyrius.com/
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