[PATCH RESEND] scsi: Introduce a help function local_time_seconds() to simplify the getting time stamp operation

[Gu Zheng <guz.fnst@cn.fujitsu.com>]

There are four places convert system time in UTC to local time seconds as a time stamp in scsi-subsystem,
so we introduce a help function local_time_seconds() to simplify these operations. 


Signed-off-by: Gu Zheng <guz.fnst@cn.fujitsu.com>
---
 drivers/scsi/3w-9xxx.c |   14 ++------------
 drivers/scsi/3w-sas.c  |   14 ++------------
 include/scsi/scsi.h    |    9 +++++++++
 3 files changed, 13 insertions(+), 24 deletions(-)

diff --git a/drivers/scsi/3w-9xxx.c b/drivers/scsi/3w-9xxx.c
index 5e1e12c..44b3ea8 100644
--- a/drivers/scsi/3w-9xxx.c
+++ b/drivers/scsi/3w-9xxx.c
@@ -374,8 +374,6 @@ out:
 /* This function will queue an event */
 static void twa_aen_queue_event(TW_Device_Extension *tw_dev, TW_Command_Apache_Header *header)
 {
-	u32 local_time;
-	struct timeval time;
 	TW_Event *event;
 	unsigned short aen;
 	char host[16];
@@ -398,9 +396,7 @@ static void twa_aen_queue_event(TW_Device_Extension *tw_dev, TW_Command_Apache_H
 	memset(event, 0, sizeof(TW_Event));
 
 	event->severity = TW_SEV_OUT(header->status_block.severity__reserved);
-	do_gettimeofday(&time);
-	local_time = (u32)(time.tv_sec - (sys_tz.tz_minuteswest * 60));
-	event->time_stamp_sec = local_time;
+	event->time_stamp_sec = local_time_seconds();
 	event->aen_code = aen;
 	event->retrieved = TW_AEN_NOT_RETRIEVED;
 	event->sequence_id = tw_dev->error_sequence_id;
@@ -479,11 +475,9 @@ out:
 static void twa_aen_sync_time(TW_Device_Extension *tw_dev, int request_id)
 {
 	u32 schedulertime;
-	struct timeval utc;
 	TW_Command_Full *full_command_packet;
 	TW_Command *command_packet;
 	TW_Param_Apache *param;
-	u32 local_time;
 
 	/* Fill out the command packet */
 	full_command_packet = tw_dev->command_packet_virt[request_id];
@@ -503,11 +497,7 @@ static void twa_aen_sync_time(TW_Device_Extension *tw_dev, int request_id)
 	param->parameter_id = cpu_to_le16(0x3); /* SchedulerTime */
 	param->parameter_size_bytes = cpu_to_le16(4);
 
-	/* Convert system time in UTC to local time seconds since last 
-           Sunday 12:00AM */
-	do_gettimeofday(&utc);
-	local_time = (u32)(utc.tv_sec - (sys_tz.tz_minuteswest * 60));
-	schedulertime = local_time - (3 * 86400);
+	schedulertime = local_time_seconds() - (3 * 86400);
 	schedulertime = cpu_to_le32(schedulertime % 604800);
 
 	memcpy(param->data, &schedulertime, sizeof(u32));
diff --git a/drivers/scsi/3w-sas.c b/drivers/scsi/3w-sas.c
index c845bdb..69f1d8a 100644
--- a/drivers/scsi/3w-sas.c
+++ b/drivers/scsi/3w-sas.c
@@ -236,8 +236,6 @@ out:
 /* This function will queue an event */
 static void twl_aen_queue_event(TW_Device_Extension *tw_dev, TW_Command_Apache_Header *header)
 {
-	u32 local_time;
-	struct timeval time;
 	TW_Event *event;
 	unsigned short aen;
 	char host[16];
@@ -256,9 +254,7 @@ static void twl_aen_queue_event(TW_Device_Extension *tw_dev, TW_Command_Apache_H
 	memset(event, 0, sizeof(TW_Event));
 
 	event->severity = TW_SEV_OUT(header->status_block.severity__reserved);
-	do_gettimeofday(&time);
-	local_time = (u32)(time.tv_sec - (sys_tz.tz_minuteswest * 60));
-	event->time_stamp_sec = local_time;
+	event->time_stamp_sec = local_time_seconds();
 	event->aen_code = aen;
 	event->retrieved = TW_AEN_NOT_RETRIEVED;
 	event->sequence_id = tw_dev->error_sequence_id;
@@ -444,11 +440,9 @@ out:
 static void twl_aen_sync_time(TW_Device_Extension *tw_dev, int request_id)
 {
 	u32 schedulertime;
-	struct timeval utc;
 	TW_Command_Full *full_command_packet;
 	TW_Command *command_packet;
 	TW_Param_Apache *param;
-	u32 local_time;
 
 	/* Fill out the command packet */
 	full_command_packet = tw_dev->command_packet_virt[request_id];
@@ -468,11 +462,7 @@ static void twl_aen_sync_time(TW_Device_Extension *tw_dev, int request_id)
 	param->parameter_id = cpu_to_le16(0x3); /* SchedulerTime */
 	param->parameter_size_bytes = cpu_to_le16(4);
 
-	/* Convert system time in UTC to local time seconds since last 
-           Sunday 12:00AM */
-	do_gettimeofday(&utc);
-	local_time = (u32)(utc.tv_sec - (sys_tz.tz_minuteswest * 60));
-	schedulertime = local_time - (3 * 86400);
+	schedulertime = local_time_seconds() - (3 * 86400);
 	schedulertime = cpu_to_le32(schedulertime % 604800);
 
 	memcpy(param->data, &schedulertime, sizeof(u32));
diff --git a/include/scsi/scsi.h b/include/scsi/scsi.h
index 66216c1..f3377ca 100644
--- a/include/scsi/scsi.h
+++ b/include/scsi/scsi.h
@@ -574,4 +574,13 @@ static inline __u32 scsi_to_u32(__u8 *ptr)
 	return (ptr[0]<<24) + (ptr[1]<<16) + (ptr[2]<<8) + ptr[3];
 }
 
+/*
+ * Convert system time in UTC to local time seconds.
+ */
+static inline u32 local_time_seconds(void)
+{
+	struct timeval utc;
+	do_gettimeofday(&utc);
+	return (u32)(utc.tv_sec - (sys_tz.tz_minuteswest * 60));
+}
 #endif /* _SCSI_SCSI_H */
-- 
1.7.7