From f990bee3f1871616d7b255b374ca33212999201e Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Fri, 20 Apr 2018 18:04:40 +0200 Subject: [PATCH] scsi: ips: fix firmware timestamps for 32-bit 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 Signed-off-by: Martin K. Petersen --- 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 e3c8857..bd6ac6b 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]) & 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); } @@ -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] & 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); } } @@ -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.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 + 1900) / 100; + 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 366be3b..db54617 100644 --- a/drivers/scsi/ips.h +++ b/drivers/scsi/ips.h @@ -402,16 +402,7 @@ #define IPS_BIOS_HEADER 0xC0 /* time oriented stuff */ - #define IPS_IS_LEAP_YEAR(y) (((y % 4 == 0) && ((y % 100 != 0) || (y % 400 == 0))) ? 1 : 0) - #define IPS_NUM_LEAP_YEARS_THROUGH(y) ((y) / 4 - (y) / 100 + (y) / 400) - - #define IPS_SECS_MIN 60 - #define IPS_SECS_HOUR 3600 #define IPS_SECS_8HOURS 28800 - #define IPS_SECS_DAY 86400 - #define IPS_DAYS_NORMAL_YEAR 365 - #define IPS_DAYS_LEAP_YEAR 366 - #define IPS_EPOCH_YEAR 1970 /* * Scsi_Host Template @@ -1054,7 +1045,7 @@ 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*/ -- 2.7.4