linux-kernel - [PATCH] smc911x: test after postfix decrement fails in smc911x_{reset,drop

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Message-ID: <47FC922A.6030309@tiscali.nl>
Date:	Wed, 09 Apr 2008 11:53:46 +0200
From:	Roel Kluin <12o3l@...cali.nl>
To:	nico@....org
CC:	netdev@...r.kernel.org, lkml <linux-kernel@...r.kernel.org>
Subject: [PATCH] smc911x: test after postfix decrement fails in smc911x_{reset,drop_pkt}

When timeout reaches 0 the postfix decrement still subtracts, so the test fails

Signed-off-by: Roel Kluin <12o3l@...cali.nl>
---
diff --git a/drivers/net/smc911x.c b/drivers/net/smc911x.c
index 76cc1d3..2126d24 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);
@@ -413,7 +413,7 @@ static inline void smc911x_drop_pkt(struct net_device *dev)
 		do {
 			udelay(10);
 			reg = SMC_GET_RX_DP_CTRL() & RX_DP_CTRL_FFWD_BUSY_;
-		} while ( timeout-- && reg);
+		} while ( --timeout && reg);
 		if (timeout == 0) {
 			PRINTK("%s: timeout waiting for RX fast forward\n", dev->name);
 		}
--
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