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

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Date:	Mon, 25 Aug 2008 23:05:09 +0200
From:	Florian Fainelli <florian.fainelli@...ecomint.eu>
To:	Martin Michlmayr <tbm@...ius.com>
Cc:	Sten Wang <sten.wang@....com.tw>, netdev@...r.kernel.org,
	Martin Michlmayr <tbm@...ius.com>
Subject: Re: r6040: bad udelay call, build failure on ARM with R6040=m

Hey Martin,

Le Monday 25 August 2008 14:05:02 Martin Michlmayr, vous avez écrit :
> 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:

Please find/test the patch below :
--
From: Florian Fainelli <florian.fainelli@...ecomint.eu>
Subject: [PATCH] r6040: fix bad usage of udelay

This patch fixes the bad usage of udelay(5000), which in turns is a
mdelay(5). It causes compilation for ARM where udelay maximum value
is checked.

Reported-by: Martin Michlmayr <tbm@...ius.com>
Signed-off-by: Florian Fainelli <florian.fainelli@...ecomint.eu>
---
diff --git a/drivers/net/r6040.c b/drivers/net/r6040.c
index d453987..d837bef 100644
--- a/drivers/net/r6040.c
+++ b/drivers/net/r6040.c
@@ -364,7 +364,7 @@ static void r6040_init_mac_regs(struct net_device *dev)
 	/* Reset internal state machine */
 	iowrite16(2, ioaddr + MAC_SM);
 	iowrite16(0, ioaddr + MAC_SM);
-	udelay(5000);
+	mdelay(5);
 
 	/* MAC Bus Control Register */
 	iowrite16(MBCR_DEFAULT, ioaddr + MBCR);
@@ -800,7 +800,7 @@ static void r6040_mac_address(struct net_device *dev)
 	iowrite16(0x01, ioaddr + MCR1); /* Reset MAC */
 	iowrite16(2, ioaddr + MAC_SM); /* Reset internal state machine */
 	iowrite16(0, ioaddr + MAC_SM);
-	udelay(5000);
+	mdelay(5);
 
 	/* Restore MAC Address */
 	adrp = (u16 *) dev->dev_addr;
--
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