scsi: 3ware: use 64-bit times for FW time sync

The calculation of the number of seconds since Sunday 00:00:00 overflows
in 2106, meaning that we instead will return the seconds since Wednesday
06:28:16 afterwards.

Using 64-bit time stamps avoids this slight inconsistency, and the
deprecated do_gettimeofday(), replacing it with the simpler
ktime_get_real_seconds().

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Adam Radford <aradford@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

1 files changed, 3 insertions, 5 deletions

diff --git a/drivers/scsi/3w-9xxx.c b/drivers/scsi/3w-9xxx.c
index cb9af3f7b653..b1c9bd9c1bfd 100644
--- a/drivers/scsi/3w-9xxx.c
+++ b/drivers/scsi/3w-9xxx.c
@@ -472,11 +472,10 @@ 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;
+        time64_t local_time;
 
         /* Fill out the command packet */
         full_command_packet = tw_dev->command_packet_virt[request_id];
@@ -498,9 +497,8 @@ static void twa_aen_sync_time(TW_Device_Extension *tw_dev, int request_id)
 
         /* 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);
+        local_time = (ktime_get_real_seconds() - (sys_tz.tz_minuteswest * 60));
+        div_u64_rem(local_time - (3 * 86400), 604800, &schedulertime);
         schedulertime = cpu_to_le32(schedulertime % 604800);
 
         memcpy(param->data, &schedulertime, sizeof(u32));