From: Roel Kluin <12o3l@tiscali.nl>
Date: Fri, 18 Apr 2008 20:50:48 +0000 (-0700)
Subject: smc911x: test after postfix decrement fails in smc911x_{reset,drop_pkt}
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=db2961c5a13562503c82ae306af269fde4fea8f0;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

smc911x: test after postfix decrement fails in smc911x_{reset,drop_pkt}

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

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Roel Kluin <12o3l@tiscali.nl>
Acked-by: Peter Korsgaard <jacmet@sunsite.dk>
Cc: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
---

diff --git a/drivers/net/smc911x.c b/drivers/net/smc911x.c
index 8fbc08b73589..4e2800205189 100644
--- a/drivers/net/smc911x.c
+++ b/drivers/net/smc911x.c
@@ -244,7 +244,7 @@ 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;
@@ -268,7 +268,7 @@ 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);
@@ -414,7 +414,7 @@ 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);
 		}