do_gettimeofday() is deprecated since it will stop working in 2038 on
32-bit platforms, leading to incorrect times passed to the firmware.
On 64-bit platforms the current code appears to be fine, as the
calculation passes an 8-bit century number into the firmware that can
represent times long in the future (possibly until 25599).
Using ktime_get_real_seconds() to get a 64-bit seconds value and
time64_to_tm() to convert it into the firmware format greatly simplifies
the ips timekeeping code, makes 32-bit and 64-bit behave the same way
here, and gets us closer to removing the deprecated interfaces.
Signed-off-by: Arnd Bergmann
---
v2: addressed review comments from Finn Thain:
- rewrite changelog text
- drop now-unused macros
- fix incorrect century calculation
---
drivers/scsi/ips.c | 78 +++---
drivers/scsi/ips.h | 11 +---
2 files changed, 17 insertions(+), 72 deletions(-)
diff --git a/drivers/scsi/ips.c b/drivers/scsi/ips.c
index a70f36a6d205..0e8a22c38c11 100644
--- a/drivers/scsi/ips.c
+++ b/drivers/scsi/ips.c
@@ -291,7 +291,7 @@ static void ips_freescb(ips_ha_t *, ips_scb_t *);
static void ips_setup_funclist(ips_ha_t *);
static void ips_statinit(ips_ha_t *);
static void ips_statinit_memio(ips_ha_t *);
-static void ips_fix_ffdc_time(ips_ha_t *, ips_scb_t *, time_t);
+static void ips_fix_ffdc_time(ips_ha_t *, ips_scb_t *, time64_t);
static void ips_ffdc_reset(ips_ha_t *, int);
static void ips_ffdc_time(ips_ha_t *);
static uint32_t ips_statupd_copperhead(ips_ha_t *);
@@ -985,10 +985,7 @@ static int __ips_eh_reset(struct scsi_cmnd *SC)
/* FFDC */
if (le32_to_cpu(ha->subsys->param[3]) & 0x30) {
- struct timeval tv;
-
- do_gettimeofday(&tv);
- ha->last_ffdc = tv.tv_sec;
+ ha->last_ffdc = ktime_get_real_seconds();
ha->reset_count++;
ips_ffdc_reset(ha, IPS_INTR_IORL);
}
@@ -2392,7 +2389,6 @@ static int
ips_hainit(ips_ha_t * ha)
{
int i;
- struct timeval tv;
METHOD_TRACE("ips_hainit", 1);
@@ -2407,8 +2403,7 @@ ips_hainit(ips_ha_t * ha)
/* Send FFDC */
ha->reset_count = 1;
- do_gettimeofday(&tv);
- ha->last_ffdc = tv.tv_sec;
+ ha->last_ffdc = ktime_get_real_seconds();
ips_ffdc_reset(ha, IPS_INTR_IORL);
if (!ips_read_config(ha, IPS_INTR_IORL)) {
@@ -2548,12 +2543,9 @@ ips_next(ips_ha_t * ha, int intr)
if ((ha->subsys->param[3] & 0x30)
&& (ha->scb_activelist.count == 0)) {
- struct timeval tv;
-
- do_gettimeofday(&tv);
-
- if (tv.tv_sec - ha->last_ffdc > IPS_SECS_8HOURS) {
- ha->last_ffdc = tv.tv_sec;
+ time64_t now = ktime_get_real_seconds();
+ if (now - ha->last_ffdc > IPS_SECS_8HOURS) {
+ ha->last_ffdc = now;
ips_ffdc_time(ha);
}
}
@@ -5988,59 +5980,21 @@ ips_ffdc_time(ips_ha_t * ha)
/* */
//
static void
-ips_fix_ffdc_time(ips_ha_t * ha, ips_scb_t * scb, time_t current_time)
+ips_fix_ffdc_time(ips_ha_t * ha, ips_scb_t * scb, time64_t current_time)
{
- long days;
- long rem;
- int i;
- int year;
- int yleap;
- int year_lengths[2] = { IPS_DAYS_NORMAL_YEAR, IPS_DAYS_LEAP_YEAR };
- int month_lengths[12][2] = { {31, 31},
- {28, 29},
- {31, 31},
- {30, 30},
- {31, 31},
- {30, 30},
- {31, 31},
- {31, 31},
- {30, 30},
- {31, 31},
- {30, 30},
- {31, 31}
- };
+ struct tm tm;
METHOD_TRACE("ips_fix_ffdc_time", 1);
- days = current_time / IPS_SECS_DAY;
- rem = current_time % IPS_SECS_DAY;
-
- scb->cmd.ffdc.hour = (rem / IPS_SECS_HOUR);
- rem = rem % IPS_SECS_HOUR;
- scb->cmd.ffdc.minute = (rem / IPS_SECS_MIN);
- scb->cmd.ffdc.second = (rem % IPS_SECS_MIN);
-
- year = IPS_EPOCH_YEAR;
- while (days < 0 || days >= year_lengths[yleap =
IPS_IS_LEAP_YEAR(year)]) {
- int newy;
-
- newy = year + (days / IPS_DAYS_NORMAL_YEAR);
- if (days < 0)
- --newy;
- days -= (newy - year) * IPS_DAYS_NORMAL_YEAR +
- IPS_NUM_LEAP_YEARS_THROUGH(newy - 1) -
- IPS_NUM_LEAP_YEARS_THROUGH(year - 1);
- year = newy;
- }
-
- scb->cmd.ffdc.yearH = year / 100;
- scb->cmd.ffdc.yearL = year % 100;
-
- for (i = 0; days >= month_lengths[i][yleap]; ++i)
- days -= month_lengths[i][yleap];
+ time64_to_tm(current_time, 0, &tm);
- scb->cmd.ffdc.month = i + 1;
- scb->cmd.ffdc.day = days + 1;
+ scb->cmd