This patch fixes a bug in handling the timeout in pcnet_cs.c, where

it uses the following test to determine whether the timeout has
expired:

        if (jiffies - dma_start > PCNET_RDC_TIMEOUT) {

Unfortunately, PCNET_RDC_TIMEOUT is defined to be "0x02", so the
length of the timeout is only two jiffy ticks, rather than being
the expected 20ms.  This patch fixes this.

Also, the above (and one other place) should be converted to
time_after().

drivers/net/pcmcia/pcnet_cs.c

@@ -66,7 +66,7 @@
 #define SOCKET_START_PG	0x01
 #define SOCKET_STOP_PG	0xff
 
-#define PCNET_RDC_TIMEOUT 0x02	/* Max wait in jiffies for Tx RDC */
+#define PCNET_RDC_TIMEOUT (2*HZ/100)	/* Max wait in jiffies for Tx RDC */
 
 static char *if_names[] = { "auto", "10baseT", "10base2"};
 
@@ -1188,7 +1188,7 @@ static void ei_watchdog(u_long arg)
 	}
 	info->link_status = link;
     }
-    if (info->pna_phy && (jiffies - info->mii_reset > 6*HZ)) {
+    if (info->pna_phy && time_after(jiffies, info->mii_reset + 6*HZ)) {
 	link = mdio_read(mii_addr, info->eth_phy, 1) & 0x0004;
 	if (((info->phy_id == info->pna_phy) && link) ||
 	    ((info->phy_id != info->pna_phy) && !link)) {
@@ -1426,7 +1426,7 @@ static void dma_block_output(struct net_device *dev, int count,
 #endif
 
     while ((inb_p(nic_base + EN0_ISR) & ENISR_RDC) == 0)
-	if (jiffies - dma_start > PCNET_RDC_TIMEOUT) {
+	if (time_after(jiffies, dma_start + PCNET_RDC_TIMEOUT)) {
 	    printk(KERN_NOTICE "%s: timeout waiting for Tx RDC.\n",
 		   dev->name);
 	    pcnet_reset_8390(dev);