netdev - [PATCH] net: 8390: use time_after() for time comparison

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Message-Id: <1400409948-29399-1-git-send-email-manuel.schoelling@gmx.de>
Date:	Sun, 18 May 2014 12:45:48 +0200
From:	Manuel Schölling <manuel.schoelling@....de>
To:	davem@...emloft.net
Cc:	tedheadster@...il.com, joe@...ches.com,
	paul.gortmaker@...driver.com, jg1.han@...sung.com,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	Manuel Schölling <manuel.schoelling@....de>
Subject: [PATCH] net: 8390: use time_after() for time comparison

To be future-proof and for better readability the time comparisons are modified
to use time_after() instead of raw math.

Signed-off-by: Manuel Schölling <manuel.schoelling@....de>
---
 drivers/net/ethernet/8390/ax88796.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/8390/ax88796.c b/drivers/net/ethernet/8390/ax88796.c
index 455d4c3..1d162cc 100644
--- a/drivers/net/ethernet/8390/ax88796.c
+++ b/drivers/net/ethernet/8390/ax88796.c
@@ -157,7 +157,7 @@ static void ax_reset_8390(struct net_device *dev)
 
 	/* This check _should_not_ be necessary, omit eventually. */
 	while ((ei_inb(addr + EN0_ISR) & ENISR_RESET) == 0) {
-		if (jiffies - reset_start_time > 2 * HZ / 100) {
+		if (time_after(jiffies, reset_start_time + 2 * HZ / 100)) {
 			netdev_warn(dev, "%s: did not complete.\n", __func__);
 			break;
 		}
@@ -293,7 +293,7 @@ static void ax_block_output(struct net_device *dev, int count,
 	dma_start = jiffies;
 
 	while ((ei_inb(nic_base + EN0_ISR) & ENISR_RDC) == 0) {
-		if (jiffies - dma_start > 2 * HZ / 100) {		/* 20ms */
+		if (time_after(jiffies, dma_start + 2 * HZ / 100)) { /* 20ms */
 			netdev_warn(dev, "timeout waiting for Tx RDC.\n");
 			ax_reset_8390(dev);
 			ax_NS8390_init(dev, 1);
-- 
1.7.10.4

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