lkml.org 
[lkml]   [2017]   [Nov]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] scsi: ips: fix firmware timestamps for 32-bit
Date
do_gettimeofday() is deprecated since it will stop working in 2038 on
32-bit platforms. The firmware interface here actually supports times
until year 25500, so we should use longer timestamps.

Using ktime_get_real_seconds() to get a 64-bit seconds value
and time64_to_tm() to convert it into the right format also has
the advantage of greatly simplifying the time management code.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
drivers/scsi/ips.c | 78 +++++++++++-------------------------------------------
drivers/scsi/ips.h | 2 +-
2 files changed, 17 insertions(+), 63 deletions(-)

diff --git a/drivers/scsi/ips.c b/drivers/scsi/ips.c
index 67621308eb9c..887843a465e1 100644
--- a/drivers/scsi/ips.c
+++ b/drivers/scsi/ips.c
@@ -293,7 +293,7 @@ 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 *);
@@ -989,10 +989,7 @@ static int __ips_eh_reset(struct scsi_cmnd *SC)

/* FFDC */
if (le32_to_cpu(ha->subsys->param[3]) & 0x300000) {
- 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);
}
@@ -2396,7 +2393,6 @@ static int
ips_hainit(ips_ha_t * ha)
{
int i;
- struct timeval tv;

METHOD_TRACE("ips_hainit", 1);

@@ -2411,8 +2407,7 @@ 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)) {
@@ -2552,12 +2547,9 @@ ips_next(ips_ha_t * ha, int intr)

if ((ha->subsys->param[3] & 0x300000)
&& (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);
}
}
@@ -5992,59 +5984,21 @@ 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.ffdc.hour = tm.tm_hour;
+ scb->cmd.ffdc.minute = tm.tm_min;
+ scb->cmd.ffdc.second = tm.tm_sec;
+ scb->cmd.ffdc.yearH = tm.tm_year / 100 + 1900;
+ scb->cmd.ffdc.yearL = tm.tm_year % 100;
+ scb->cmd.ffdc.month = tm.tm_mon + 1;
+ scb->cmd.ffdc.day = tm.tm_mday;
}

/****************************************************************************
diff --git a/drivers/scsi/ips.h b/drivers/scsi/ips.h
index 366be3b2f9b4..b43a1ae75660 100644
--- a/drivers/scsi/ips.h
+++ b/drivers/scsi/ips.h
@@ -1054,7 +1054,7 @@ typedef struct ips_ha {
uint8_t active;
int ioctl_reset; /* IOCTL Requested Reset Flag */
uint16_t reset_count; /* number of resets */
- time_t last_ffdc; /* last time we sent ffdc info*/
+ time64_t last_ffdc; /* last time we sent ffdc info*/
uint8_t slot_num; /* PCI Slot Number */
int ioctl_len; /* size of ioctl buffer */
dma_addr_t ioctl_busaddr; /* dma address of ioctl buffer*/
--
2.9.0
\
 
 \ /
  Last update: 2017-11-10 16:41    [W:0.035 / U:1.316 seconds]
©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site