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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>
This commit is contained in:
Arnd Bergmann 2017-11-10 16:58:26 +01:00 committed by Martin K. Petersen
parent 9c88673f9d
commit bc8f91665b
2 changed files with 7 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/scsi/3w-9xxx.c
View File

@ -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));

10
drivers/scsi/3w-sas.c
View File

@ -407,11 +407,10 @@ 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;
time64_t local_time;
/* Fill out the command packet */
full_command_packet = tw_dev->command_packet_virt[request_id];
@ -433,10 +432,9 @@ static void twl_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);
schedulertime = cpu_to_le32(schedulertime % 604800);
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);
memcpy(param->data, &schedulertime, sizeof(u32));