[PATCH] drivers/net/*: use time_after() and friends

They deal with wrapping correctly and are nicer to read.  Also make
jiffies-holding variables unsigned long.

Signed-off-by: Marcelo Feitoza Parisi <marcelo@feitoza.com.br>
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Jeff Garzik <jgarzik@pobox.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>

drivers/net/3c523.c

@@ -105,6 +105,7 @@
 #include <linux/mca-legacy.h>
 #include <linux/ethtool.h>
 #include <linux/bitops.h>
+#include <linux/jiffies.h>
 
 #include <asm/uaccess.h>
 #include <asm/processor.h>
@@ -658,7 +659,7 @@ static int init586(struct net_device *dev)
 
 	s = jiffies;		/* warning: only active with interrupts on !! */
 	while (!(cfg_cmd->cmd_status & STAT_COMPL)) {
-		if (jiffies - s > 30*HZ/100)
+		if (time_after(jiffies, s + 30*HZ/100))
 			break;
 	}
 
@@ -684,7 +685,7 @@ static int init586(struct net_device *dev)
 
 	s = jiffies;
 	while (!(ias_cmd->cmd_status & STAT_COMPL)) {
-		if (jiffies - s > 30*HZ/100)
+		if (time_after(jiffies, s + 30*HZ/100))
 			break;
 	}
 
@@ -709,7 +710,7 @@ static int init586(struct net_device *dev)
 
 	s = jiffies;
 	while (!(tdr_cmd->cmd_status & STAT_COMPL)) {
-		if (jiffies - s > 30*HZ/100) {
+		if (time_after(jiffies, s + 30*HZ/100)) {
 			printk(KERN_WARNING "%s: %d Problems while running the TDR.\n", dev->name, __LINE__);
 			result = 1;
 			break;
@@ -798,7 +799,7 @@ static int init586(struct net_device *dev)
 			elmc_id_attn586();
 			s = jiffies;
 			while (!(mc_cmd->cmd_status & STAT_COMPL)) {
-				if (jiffies - s > 30*HZ/100)
+				if (time_after(jiffies, s + 30*HZ/100))
 					break;
 			}
 			if (!(mc_cmd->cmd_status & STAT_COMPL)) {

drivers/net/3c59x.c

@@ -258,6 +258,7 @@ static int vortex_debug = 1;
 #include <linux/highmem.h>
 #include <linux/eisa.h>
 #include <linux/bitops.h>
+#include <linux/jiffies.h>
 #include <asm/irq.h>			/* For NR_IRQS only. */
 #include <asm/io.h>
 #include <asm/uaccess.h>
@@ -2717,7 +2718,7 @@ boomerang_rx(struct net_device *dev)
 			skb = dev_alloc_skb(PKT_BUF_SZ);
 			if (skb == NULL) {
 				static unsigned long last_jif;
-				if ((jiffies - last_jif) > 10 * HZ) {
+				if (time_after(jiffies, last_jif + 10 * HZ)) {
 					printk(KERN_WARNING "%s: memory shortage\n", dev->name);
 					last_jif = jiffies;
 				}

drivers/net/apne.c

@@ -36,6 +36,7 @@
 #include <linux/delay.h>
 #include <linux/netdevice.h>
 #include <linux/etherdevice.h>
+#include <linux/jiffies.h>
 
 #include <asm/system.h>
 #include <asm/io.h>
@@ -216,7 +217,7 @@ static int __init apne_probe1(struct net_device *dev, int ioaddr)
 	outb(inb(ioaddr + NE_RESET), ioaddr + NE_RESET);
 
 	while ((inb(ioaddr + NE_EN0_ISR) & ENISR_RESET) == 0)
-		if (jiffies - reset_start_time > 2*HZ/100) {
+		if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
 			printk(" not found (no reset ack).\n");
 			return -ENODEV;
 		}
@@ -382,7 +383,7 @@ apne_reset_8390(struct net_device *dev)
 
     /* This check _should_not_ be necessary, omit eventually. */
     while ((inb(NE_BASE+NE_EN0_ISR) & ENISR_RESET) == 0)
-	if (jiffies - reset_start_time > 2*HZ/100) {
+	if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
 	    printk("%s: ne_reset_8390() did not complete.\n", dev->name);
 	    break;
 	}
@@ -530,7 +531,7 @@ apne_block_output(struct net_device *dev, int count,
     dma_start = jiffies;
 
     while ((inb(NE_BASE + NE_EN0_ISR) & ENISR_RDC) == 0)
-	if (jiffies - dma_start > 2*HZ/100) {		/* 20ms */
+	if (time_after(jiffies, dma_start + 2*HZ/100)) {	/* 20ms */
 		printk("%s: timeout waiting for Tx RDC.\n", dev->name);
 		apne_reset_8390(dev);
 		NS8390_init(dev,1);

drivers/net/arcnet/arcnet.c

@@ -52,6 +52,7 @@
 #include <net/arp.h>
 #include <linux/init.h>
 #include <linux/arcdevice.h>
+#include <linux/jiffies.h>
 
 /* "do nothing" functions for protocol drivers */
 static void null_rx(struct net_device *dev, int bufnum,
@@ -733,7 +734,7 @@ static void arcnet_timeout(struct net_device *dev)
 	
 	spin_unlock_irqrestore(&lp->lock, flags);
 
-	if (jiffies - lp->last_timeout > 10*HZ) {
+	if (time_after(jiffies, lp->last_timeout + 10*HZ)) {
 		BUGMSG(D_EXTRA, "tx timed out%s (status=%Xh, intmask=%Xh, dest=%02Xh)\n",
 		       msg, status, lp->intmask, lp->lasttrans_dest);
 		lp->last_timeout = jiffies;

drivers/net/arm/etherh.c

@@ -46,6 +46,7 @@
 #include <linux/device.h>
 #include <linux/init.h>
 #include <linux/bitops.h>
+#include <linux/jiffies.h>
 
 #include <asm/system.h>
 #include <asm/ecard.h>
@@ -355,7 +356,7 @@ etherh_block_output (struct net_device *dev, int count, const unsigned char *buf
 	dma_start = jiffies;
 
 	while ((readb (addr + EN0_ISR) & ENISR_RDC) == 0)
-		if (jiffies - dma_start > 2*HZ/100) { /* 20ms */
+		if (time_after(jiffies, dma_start + 2*HZ/100)) { /* 20ms */
 			printk(KERN_ERR "%s: timeout waiting for TX RDC\n",
 				dev->name);
 			etherh_reset (dev);

drivers/net/eth16i.c

@@ -161,6 +161,7 @@ static char *version =
 #include <linux/etherdevice.h>
 #include <linux/skbuff.h>
 #include <linux/bitops.h>
+#include <linux/jiffies.h>
 
 #include <asm/system.h>		  
 #include <asm/io.h>		  
@@ -754,7 +755,7 @@ static void eth16i_set_port(int ioaddr, int porttype)
 
 static int eth16i_send_probe_packet(int ioaddr, unsigned char *b, int l)
 {
-	int starttime;
+	unsigned long starttime;
 
 	outb(0xff, ioaddr + TX_STATUS_REG);
 
@@ -765,7 +766,7 @@ static int eth16i_send_probe_packet(int ioaddr, unsigned char *b, int l)
 	outb(TX_START | 1, ioaddr + TRANSMIT_START_REG); 
 
 	while( (inb(ioaddr + TX_STATUS_REG) & 0x80) == 0) {
-		if( (jiffies - starttime) > TX_TIMEOUT) {
+		if( time_after(jiffies, starttime + TX_TIMEOUT)) {
 			return -1;
 		}
 	}
@@ -775,18 +776,18 @@ static int eth16i_send_probe_packet(int ioaddr, unsigned char *b, int l)
 
 static int eth16i_receive_probe_packet(int ioaddr)
 {
-	int starttime;
+	unsigned long starttime;
 
 	starttime = jiffies;
 
 	while((inb(ioaddr + TX_STATUS_REG) & 0x20) == 0) {
-		if( (jiffies - starttime) > TX_TIMEOUT) {
+		if( time_after(jiffies, starttime + TX_TIMEOUT)) {
 
 			if(eth16i_debug > 1)
 				printk(KERN_DEBUG "Timeout occurred waiting transmit packet received\n");
 			starttime = jiffies;
 			while((inb(ioaddr + RX_STATUS_REG) & 0x80) == 0) {
-				if( (jiffies - starttime) > TX_TIMEOUT) {
+				if( time_after(jiffies, starttime + TX_TIMEOUT)) {
 					if(eth16i_debug > 1)
 						printk(KERN_DEBUG "Timeout occurred waiting receive packet\n");
 					return -1;

drivers/net/hamradio/baycom_epp.c

@@ -905,7 +905,7 @@ static int epp_open(struct net_device *dev)
 	/* autoprobe baud rate */
 	tstart = jiffies;
 	i = 0;
-	while ((signed)(jiffies-tstart-HZ/3) < 0) {
+	while (time_before(jiffies, tstart + HZ/3)) {
 		if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1)
 			goto epptimeout;
 		if ((stat & (EPP_NRAEF|EPP_NRHF)) == EPP_NRHF) {

drivers/net/hp100.c

@@ -115,6 +115,7 @@
 #include <linux/delay.h>
 #include <linux/init.h>
 #include <linux/bitops.h>
+#include <linux/jiffies.h>
 
 #include <asm/io.h>
 
@@ -1499,7 +1500,7 @@ static int hp100_start_xmit_bm(struct sk_buff *skb, struct net_device *dev)
 		printk("hp100: %s: start_xmit_bm: No TX PDL available.\n", dev->name);
 #endif
 		/* not waited long enough since last tx? */
-		if (jiffies - dev->trans_start < HZ)
+		if (time_before(jiffies, dev->trans_start + HZ))
 			return -EAGAIN;
 
 		if (hp100_check_lan(dev))
@@ -1652,7 +1653,7 @@ static int hp100_start_xmit(struct sk_buff *skb, struct net_device *dev)
 		printk("hp100: %s: start_xmit: tx free mem = 0x%x\n", dev->name, i);
 #endif
 		/* not waited long enough since last failed tx try? */
-		if (jiffies - dev->trans_start < HZ) {
+		if (time_before(jiffies, dev->trans_start + HZ)) {
 #ifdef HP100_DEBUG
 			printk("hp100: %s: trans_start timing problem\n",
 			       dev->name);

drivers/net/ne-h8300.c

@@ -27,6 +27,7 @@ static const char version1[] =
 #include <linux/delay.h>
 #include <linux/netdevice.h>
 #include <linux/etherdevice.h>
+#include <linux/jiffies.h>
 
 #include <asm/system.h>
 #include <asm/io.h>
@@ -365,7 +366,7 @@ static void ne_reset_8390(struct net_device *dev)
 
 	/* This check _should_not_ be necessary, omit eventually. */
 	while ((inb_p(NE_BASE+EN0_ISR) & ENISR_RESET) == 0)
-		if (jiffies - reset_start_time > 2*HZ/100) {
+		if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
 			printk(KERN_WARNING "%s: ne_reset_8390() did not complete.\n", dev->name);
 			break;
 		}
@@ -580,7 +581,7 @@ retry:
 #endif
 
 	while ((inb_p(NE_BASE + EN0_ISR) & ENISR_RDC) == 0)
-		if (jiffies - dma_start > 2*HZ/100) {		/* 20ms */
+		if (time_after(jiffies, dma_start + 2*HZ/100)) {		/* 20ms */
 			printk(KERN_WARNING "%s: timeout waiting for Tx RDC.\n", dev->name);
 			ne_reset_8390(dev);
 			NS8390_init(dev,1);

drivers/net/ne.c

@@ -50,6 +50,7 @@ static const char version2[] =
 #include <linux/delay.h>
 #include <linux/netdevice.h>
 #include <linux/etherdevice.h>
+#include <linux/jiffies.h>
 
 #include <asm/system.h>
 #include <asm/io.h>
@@ -341,7 +342,7 @@ static int __init ne_probe1(struct net_device *dev, int ioaddr)
 		outb(inb(ioaddr + NE_RESET), ioaddr + NE_RESET);
 
 		while ((inb_p(ioaddr + EN0_ISR) & ENISR_RESET) == 0)
-		if (jiffies - reset_start_time > 2*HZ/100) {
+		if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
 			if (bad_card) {
 				printk(" (warning: no reset ack)");
 				break;
@@ -580,7 +581,7 @@ static void ne_reset_8390(struct net_device *dev)
 
 	/* This check _should_not_ be necessary, omit eventually. */
 	while ((inb_p(NE_BASE+EN0_ISR) & ENISR_RESET) == 0)
-		if (jiffies - reset_start_time > 2*HZ/100) {
+		if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
 			printk(KERN_WARNING "%s: ne_reset_8390() did not complete.\n", dev->name);
 			break;
 		}
@@ -787,7 +788,7 @@ retry:
 #endif
 
 	while ((inb_p(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 */
 			printk(KERN_WARNING "%s: timeout waiting for Tx RDC.\n", dev->name);
 			ne_reset_8390(dev);
 			NS8390_init(dev,1);

drivers/net/ne2.c

@@ -75,6 +75,7 @@ static const char *version = "ne2.c:v0.91 Nov 16 1998 Wim Dumon <wimpie@kotnet.o
 #include <linux/etherdevice.h>
 #include <linux/skbuff.h>
 #include <linux/bitops.h>
+#include <linux/jiffies.h>
 
 #include <asm/system.h>
 #include <asm/io.h>
@@ -395,7 +396,7 @@ static int __init ne2_probe1(struct net_device *dev, int slot)
 		outb(inb(base_addr + NE_RESET), base_addr + NE_RESET);
 
 		while ((inb_p(base_addr + EN0_ISR) & ENISR_RESET) == 0)
-			if (jiffies - reset_start_time > 2*HZ/100) {
+			if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
 				printk(" not found (no reset ack).\n");
 				retval = -ENODEV;
 				goto out;
@@ -548,7 +549,7 @@ static void ne_reset_8390(struct net_device *dev)
 
 	/* This check _should_not_ be necessary, omit eventually. */
 	while ((inb_p(NE_BASE+EN0_ISR) & ENISR_RESET) == 0)
-		if (jiffies - reset_start_time > 2*HZ/100) {
+		if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
 			printk("%s: ne_reset_8390() did not complete.\n", 
 					dev->name);
 			break;
@@ -749,7 +750,7 @@ retry:
 #endif
 
 	while ((inb_p(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 */
 			printk("%s: timeout waiting for Tx RDC.\n", dev->name);
 			ne_reset_8390(dev);
 			NS8390_init(dev,1);

drivers/net/ns83820.c

@@ -116,6 +116,7 @@
 #include <linux/timer.h>
 #include <linux/if_vlan.h>
 #include <linux/rtnetlink.h>
+#include <linux/jiffies.h>
 
 #include <asm/io.h>
 #include <asm/uaccess.h>
@@ -1607,7 +1608,7 @@ static void ns83820_run_bist(struct net_device *ndev, const char *name, u32 enab
 {
 	struct ns83820 *dev = PRIV(ndev);
 	int timed_out = 0;
-	long start;
+	unsigned long start;
 	u32 status;
 	int loops = 0;
 
@@ -1625,7 +1626,7 @@ static void ns83820_run_bist(struct net_device *ndev, const char *name, u32 enab
 			break;
 		if (status & fail)
 			break;
-		if ((jiffies - start) >= HZ) {
+		if (time_after_eq(jiffies, start + HZ)) {
 			timed_out = 1;
 			break;
 		}

drivers/net/oaknet.c

@@ -20,6 +20,7 @@
 #include <linux/netdevice.h>
 #include <linux/etherdevice.h>
 #include <linux/init.h>
+#include <linux/jiffies.h>
 
 #include <asm/board.h>
 #include <asm/io.h>
@@ -606,7 +607,7 @@ retry:
 #endif
 
 	while ((ei_ibp(base + EN0_ISR) & ENISR_RDC) == 0) {
-		if (jiffies - start > OAKNET_WAIT) {
+		if (time_after(jiffies, start + OAKNET_WAIT)) {
 			printk("%s: timeout waiting for Tx RDC.\n", dev->name);
 			oaknet_reset_8390(dev);
 			NS8390_init(dev, TRUE);

drivers/net/pcmcia/3c589_cs.c

@@ -39,6 +39,7 @@
 #include <linux/if_arp.h>
 #include <linux/ioport.h>
 #include <linux/bitops.h>
+#include <linux/jiffies.h>
 
 #include <pcmcia/cs_types.h>
 #include <pcmcia/cs.h>
@@ -796,7 +797,7 @@ static void media_check(unsigned long arg)
     media = inw(ioaddr+WN4_MEDIA) & 0xc810;
 
     /* Ignore collisions unless we've had no irq's recently */
-    if (jiffies - lp->last_irq < HZ) {
+    if (time_before(jiffies, lp->last_irq + HZ)) {
 	media &= ~0x0010;
     } else {
 	/* Try harder to detect carrier errors */

drivers/net/ppp_async.c

@@ -30,6 +30,7 @@
 #include <linux/ppp_channel.h>
 #include <linux/spinlock.h>
 #include <linux/init.h>
+#include <linux/jiffies.h>
 #include <asm/uaccess.h>
 #include <asm/string.h>
 
@@ -570,7 +571,7 @@ ppp_async_encode(struct asyncppp *ap)
 		 * character if necessary.
 		 */
 		if (islcp || flag_time == 0
-		    || jiffies - ap->last_xmit >= flag_time)
+		    || time_after_eq(jiffies, ap->last_xmit + flag_time))
 			*buf++ = PPP_FLAG;
 		ap->last_xmit = jiffies;
 		fcs = PPP_INITFCS;

drivers/net/seeq8005.c

@@ -46,6 +46,7 @@ static const char version[] =
 #include <linux/etherdevice.h>
 #include <linux/skbuff.h>
 #include <linux/bitops.h>
+#include <linux/jiffies.h>
 
 #include <asm/system.h>
 #include <asm/io.h>
@@ -699,7 +700,7 @@ static void hardware_send_packet(struct net_device * dev, char *buf, int length)
 	int ioaddr = dev->base_addr;
 	int status = inw(SEEQ_STATUS);
 	int transmit_ptr = 0;
-	int tmp;
+	unsigned long tmp;
 
 	if (net_debug>4) {
 		printk("%s: send 0x%04x\n",dev->name,length);
@@ -724,7 +725,7 @@ static void hardware_send_packet(struct net_device * dev, char *buf, int length)
 	
 	/* drain FIFO */
 	tmp = jiffies;
-	while ( (((status=inw(SEEQ_STATUS)) & SEEQSTAT_FIFO_EMPTY) == 0) && (jiffies - tmp < HZ))
+	while ( (((status=inw(SEEQ_STATUS)) & SEEQSTAT_FIFO_EMPTY) == 0) && time_before(jiffies, tmp + HZ))
 		mb();
 	
 	/* doit ! */

drivers/net/shaper.c

@@ -83,6 +83,7 @@
 #include <linux/if_arp.h>
 #include <linux/init.h>
 #include <linux/if_shaper.h>
+#include <linux/jiffies.h>
 
 #include <net/dst.h>
 #include <net/arp.h>
@@ -168,7 +169,7 @@ static int shaper_start_xmit(struct sk_buff *skb, struct net_device *dev)
 		/*
 		 *	Queue over time. Spill packet.
 		 */
-		if(SHAPERCB(skb)->shapeclock-jiffies > SHAPER_LATENCY) {
+		if(time_after(SHAPERCB(skb)->shapeclock,jiffies + SHAPER_LATENCY)) {
 			dev_kfree_skb(skb);
 			shaper->stats.tx_dropped++;
 		} else

drivers/net/tokenring/lanstreamer.c

@@ -122,6 +122,7 @@
 #include <linux/spinlock.h>
 #include <linux/version.h>
 #include <linux/bitops.h>
+#include <linux/jiffies.h>
 
 #include <net/checksum.h>
 
@@ -512,7 +513,7 @@ static int streamer_reset(struct net_device *dev)
 
 	while (!((readw(streamer_mmio + SISR)) & SISR_SRB_REPLY)) {
 		msleep_interruptible(100);
-		if (jiffies - t > 40 * HZ) {
+		if (time_after(jiffies, t + 40 * HZ)) {
 			printk(KERN_ERR
 			       "IBM PCI tokenring card not responding\n");
 			release_region(dev->base_addr, STREAMER_IO_SPACE);

drivers/net/tokenring/olympic.c

@@ -100,6 +100,7 @@
 #include <linux/pci.h>
 #include <linux/spinlock.h>
 #include <linux/bitops.h>
+#include <linux/jiffies.h>
 
 #include <net/checksum.h>
 
@@ -307,7 +308,7 @@ static int __devinit olympic_init(struct net_device *dev)
 	t=jiffies;
 	while((readl(olympic_mmio+BCTL)) & BCTL_SOFTRESET) {
 		schedule();		
-		if(jiffies-t > 40*HZ) {
+		if(time_after(jiffies, t + 40*HZ)) {
 			printk(KERN_ERR "IBM PCI tokenring card not responding.\n");
 			return -ENODEV;
 		}
@@ -359,7 +360,7 @@ static int __devinit olympic_init(struct net_device *dev)
 		t=jiffies;
 		while (!readl(olympic_mmio+CLKCTL) & CLKCTL_PAUSE) { 
 			schedule() ; 
-			if(jiffies-t > 2*HZ) { 
+			if(time_after(jiffies, t + 2*HZ)) {
 				printk(KERN_ERR "IBM Cardbus tokenring adapter not responsing.\n") ; 
 				return -ENODEV;
 			}
@@ -373,7 +374,7 @@ static int __devinit olympic_init(struct net_device *dev)
 	t=jiffies;
 	while(!((readl(olympic_mmio+SISR_RR)) & SISR_SRB_REPLY)) {
 		schedule();		
-		if(jiffies-t > 15*HZ) {
+		if(time_after(jiffies, t + 15*HZ)) {
 			printk(KERN_ERR "IBM PCI tokenring card not responding.\n");
 			return -ENODEV;
 		}
@@ -519,7 +520,7 @@ static int olympic_open(struct net_device *dev)
             			olympic_priv->srb_queued=0;
             			break;
         		}
-			if ((jiffies-t) > 10*HZ) { 
+			if (time_after(jiffies, t + 10*HZ)) {
 				printk(KERN_WARNING "%s: SRB timed out. \n",dev->name) ; 
 				olympic_priv->srb_queued=0;
 				break ; 

drivers/net/tulip/pnic.c

@@ -16,6 +16,7 @@
 
 #include <linux/kernel.h>
 #include <linux/pci.h>
+#include <linux/jiffies.h>
 #include "tulip.h"
 
 
@@ -68,7 +69,7 @@ void pnic_lnk_change(struct net_device *dev, int csr5)
 		 */
 		if (tulip_media_cap[dev->if_port] & MediaIsMII)
 			return;
-		if (! tp->nwayset  ||  jiffies - dev->trans_start > 1*HZ) {
+		if (! tp->nwayset  ||  time_after(jiffies, dev->trans_start + 1*HZ)) {
 			tp->csr6 = 0x00420000 | (tp->csr6 & 0x0000fdff);
 			iowrite32(tp->csr6, ioaddr + CSR6);
 			iowrite32(0x30, ioaddr + CSR12);

drivers/net/wireless/strip.c

@@ -112,7 +112,7 @@ static const char StripVersion[] = "1.3A-STUART.CHESHIRE";
 #include <linux/ip.h>
 #include <linux/tcp.h>
 #include <linux/time.h>
-
+#include <linux/jiffies.h>
 
 /************************************************************************/
 /* Useful structures and definitions					*/
@@ -1569,7 +1569,7 @@ static int strip_xmit(struct sk_buff *skb, struct net_device *dev)
 	del_timer(&strip_info->idle_timer);
 
 
-	if (jiffies - strip_info->pps_timer > HZ) {
+	if (time_after(jiffies, strip_info->pps_timer + HZ)) {
 		unsigned long t = jiffies - strip_info->pps_timer;
 		unsigned long rx_pps_count = (strip_info->rx_pps_count * HZ * 8 + t / 2) / t;
 		unsigned long tx_pps_count = (strip_info->tx_pps_count * HZ * 8 + t / 2) / t;

drivers/net/zorro8390.c

@@ -27,6 +27,7 @@
 #include <linux/netdevice.h>
 #include <linux/etherdevice.h>
 #include <linux/zorro.h>
+#include <linux/jiffies.h>
 
 #include <asm/system.h>
 #include <asm/irq.h>
@@ -151,7 +152,7 @@ static int __devinit zorro8390_init(struct net_device *dev,
 	z_writeb(z_readb(ioaddr + NE_RESET), ioaddr + NE_RESET);
 
 	while ((z_readb(ioaddr + NE_EN0_ISR) & ENISR_RESET) == 0)
-	    if (jiffies - reset_start_time > 2*HZ/100) {
+	    if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
 		printk(KERN_WARNING " not found (no reset ack).\n");
 		return -ENODEV;
 	    }
@@ -273,7 +274,7 @@ static void zorro8390_reset_8390(struct net_device *dev)
 
     /* This check _should_not_ be necessary, omit eventually. */
     while ((z_readb(NE_BASE+NE_EN0_ISR) & ENISR_RESET) == 0)
-	if (jiffies - reset_start_time > 2*HZ/100) {
+	if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
 	    printk(KERN_WARNING "%s: ne_reset_8390() did not complete.\n",
 		   dev->name);
 	    break;
@@ -400,7 +401,7 @@ static void zorro8390_block_output(struct net_device *dev, int count,
     dma_start = jiffies;
 
     while ((z_readb(NE_BASE + NE_EN0_ISR) & ENISR_RDC) == 0)
-	if (jiffies - dma_start > 2*HZ/100) {		/* 20ms */
+	if (time_after(jiffies, dma_start + 2*HZ/100)) {	/* 20ms */
 		printk(KERN_ERR "%s: timeout waiting for Tx RDC.\n",
 		       dev->name);
 		zorro8390_reset_8390(dev);