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Date:	Mon, 05 Nov 2007 00:49:27 +0100
From:	Roel Kluin <12o3l@...cali.nl>
To:	netdev@...r.kernel.org
Subject: Re: [PATCH] postfix decrement error in smc911x_reset(); drivers/net/smc911x.c

And there was another one...
--
If timeout causes the loop to end, a postfix decrement causes its value to 
become 4294967295 (unsigned int), not 0.

Signed-off-by: Roel Kluin <12o3l@...cali.nl>
---
diff --git a/drivers/net/smc911x.c b/drivers/net/smc911x.c
index dd18af0..fac1d2a 100644
--- a/drivers/net/smc911x.c
+++ b/drivers/net/smc911x.c
@@ -243,7 +243,7 @@ static void smc911x_reset(struct net_device *dev)
 		do {
 			udelay(10);
 			reg = SMC_GET_PMT_CTRL() & PMT_CTRL_READY_;
-		} while ( timeout-- && !reg);
+		} while ( --timeout && !reg);
 		if (timeout == 0) {
 			PRINTK("%s: smc911x_reset timeout waiting for PM restore\n", dev->name);
 			return;
@@ -267,7 +267,7 @@ static void smc911x_reset(struct net_device *dev)
 				resets++;
 				break;
 			}
-		} while ( timeout-- && (reg & HW_CFG_SRST_));
+		} while ( --timeout && (reg & HW_CFG_SRST_));
 	}
 	if (timeout == 0) {
 		PRINTK("%s: smc911x_reset timeout waiting for reset\n", dev->name);

-
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