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

They deal with wrapping correctly and are nicer to read.

Signed-off-by: Marcelo Feitoza Parisi <marcelo@feitoza.com.br>
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Cc: James Bottomley <James.Bottomley@steeleye.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

5 files changed, 11 insertions, 6 deletions

diff --git a/drivers/scsi/BusLogic.c b/drivers/scsi/BusLogic.c
index 1c459343292b..5bf83cbca868 100644
--- a/drivers/scsi/BusLogic.c
+++ b/drivers/scsi/BusLogic.c
@@ -41,6 +41,7 @@
 #include <linux/stat.h>
 #include <linux/pci.h>
 #include <linux/spinlock.h>
+#include <linux/jiffies.h>
 #include <scsi/scsicam.h>
 
 #include <asm/dma.h>
@@ -2896,7 +2897,7 @@ static int BusLogic_QueueCommand(struct scsi_cmnd *Command, void (*CompletionRou
                  */
                 if (HostAdapter->ActiveCommands[TargetID] == 0)
                         HostAdapter->LastSequencePoint[TargetID] = jiffies;
-                else if (jiffies - HostAdapter->LastSequencePoint[TargetID] > 4 * HZ) {
+                else if (time_after(jiffies, HostAdapter->LastSequencePoint[TargetID] + 4 * HZ)) {
                         HostAdapter->LastSequencePoint[TargetID] = jiffies;
                         QueueTag = BusLogic_OrderedQueueTag;
                 }
diff --git a/drivers/scsi/osst.c b/drivers/scsi/osst.c
index 66ea47a9c53c..e3bd4bc339f4 100644
--- a/drivers/scsi/osst.c
+++ b/drivers/scsi/osst.c
@@ -49,6 +49,7 @@ static const char * osst_version = "0.99.4";
 #include <linux/blkdev.h>
 #include <linux/moduleparam.h>
 #include <linux/delay.h>
+#include <linux/jiffies.h>
 #include <asm/uaccess.h>
 #include <asm/dma.h>
 #include <asm/system.h>
@@ -856,7 +857,7 @@ static int osst_wait_frame(struct osst_tape * STp, struct osst_request ** aSRpnt
                     ) && result >= 0)
                 {
 #if DEBUG                       
-                        if (debugging || jiffies - startwait >= 2*HZ/OSST_POLL_PER_SEC)
+                        if (debugging || time_after_eq(jiffies, startwait + 2*HZ/OSST_POLL_PER_SEC))
                                 printk (OSST_DEB_MSG
                                         "%s:D: Succ wait f fr %i (>%i): %i-%i %i (%i): %3li.%li s\n",
                                         name, curr, curr+minlast, STp->first_frame_position,
@@ -867,7 +868,7 @@ static int osst_wait_frame(struct osst_tape * STp, struct osst_request ** aSRpnt
                         return 0;
                 }
 #if DEBUG
-                if (jiffies - startwait >= 2*HZ/OSST_POLL_PER_SEC && notyetprinted)
+                if (time_after_eq(jiffies, startwait + 2*HZ/OSST_POLL_PER_SEC) && notyetprinted)
                 {
                         printk (OSST_DEB_MSG "%s:D: Wait for frame %i (>%i): %i-%i %i (%i)\n",
                                 name, curr, curr+minlast, STp->first_frame_position,
diff --git a/drivers/scsi/ppa.c b/drivers/scsi/ppa.c
index 05347eed9dd5..fee843fab1c7 100644
--- a/drivers/scsi/ppa.c
+++ b/drivers/scsi/ppa.c
@@ -18,6 +18,7 @@
 #include <linux/parport.h>
 #include <linux/workqueue.h>
 #include <linux/delay.h>
+#include <linux/jiffies.h>
 #include <asm/io.h>
 
 #include <scsi/scsi.h>
@@ -726,7 +727,7 @@ static int ppa_engine(ppa_struct *dev, struct scsi_cmnd *cmd)
                                 retv--;
 
                         if (retv) {
-                                if ((jiffies - dev->jstart) > (1 * HZ)) {
+                                if (time_after(jiffies, dev->jstart + (1 * HZ))) {
                                         printk
                                             ("ppa: Parallel port cable is unplugged!!\n");
                                         ppa_fail(dev, DID_BUS_BUSY);
diff --git a/drivers/scsi/qlogicfc.c b/drivers/scsi/qlogicfc.c
index 94ef3f08d378..5b15998c71a6 100644
--- a/drivers/scsi/qlogicfc.c
+++ b/drivers/scsi/qlogicfc.c
@@ -61,6 +61,7 @@
 #include <linux/unistd.h>
 #include <linux/spinlock.h>
 #include <linux/interrupt.h>
+#include <linux/jiffies.h>
 #include <asm/io.h>
 #include <asm/irq.h>
 #include "scsi.h"
@@ -1325,7 +1326,7 @@ static int isp2x00_queuecommand(Scsi_Cmnd * Cmnd, void (*done) (Scsi_Cmnd *))
                 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
diff --git a/drivers/scsi/qlogicpti.c b/drivers/scsi/qlogicpti.c
index 1fd5fc6d0fe3..c7e78dcf09df 100644
--- a/drivers/scsi/qlogicpti.c
+++ b/drivers/scsi/qlogicpti.c
@@ -24,6 +24,7 @@
 #include <linux/spinlock.h>
 #include <linux/interrupt.h>
 #include <linux/module.h>
+#include <linux/jiffies.h>
 
 #include <asm/byteorder.h>
 
@@ -1017,7 +1018,7 @@ static inline void cmd_frob(struct Command_Entry *cmd, struct scsi_cmnd *Cmnd,
         if (Cmnd->device->tagged_supported) {
                 if (qpti->cmd_count[Cmnd->device->id] == 0)
                         qpti->tag_ages[Cmnd->device->id] = jiffies;
-                if ((jiffies - qpti->tag_ages[Cmnd->device->id]) > (5*HZ)) {
+                if (time_after(jiffies, qpti->tag_ages[Cmnd->device->id] + (5*HZ))) {
                         cmd->control_flags = CFLAG_ORDERED_TAG;
                         qpti->tag_ages[Cmnd->device->id] = jiffies;
                 } else