[PATCH] qlogicfc: use time_after() macro

From: Marcelo Feitoza Parisi <marcelo@feitoza.com.br>

It deals with wrapping correctly and is nicer to read.

Signed-off-by: Marcelo Feitoza Parisi <marcelo@feitoza.com.br>
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>

Index: linux-kj/drivers/scsi/qlogicfc.c
===================================================================
--- linux-kj.orig/drivers/scsi/qlogicfc.c	2005-10-28 16:30:14.000000000 +0400
+++ linux-kj/drivers/scsi/qlogicfc.c	2005-10-28 16:31:46.000000000 +0400
@@ -1326,7 +1326,8 @@ static int isp2x00_queuecommand(Scsi_Cmn
 		cmd->control_flags = cpu_to_le16(CFLAG_READ);
 
 	if (Cmnd->device->tagged_supported) {
-		if ((jiffies - hostdata->tag_ages[Cmnd->device->id]) > (2 * ISP_TIMEOUT)) {
+		if (time_after(jiffies, hostdata->tag_ages[Cmnd->device->id]
+					+ (2 * ISP_TIMEOUT))) {
 			cmd->control_flags |= cpu_to_le16(CFLAG_ORDERED_TAG);
 			hostdata->tag_ages[Cmnd->device->id] = jiffies;
 		} else