From: Arnd Bergmann <arnd@xxxxxxxx>
[ Upstream commit 820f188659122602ab217dd80cfa32b3ac0c55c0 ]
aacraid passes the current time to the firmware in one of two ways,
either as year/month/day/... or as 32-bit unsigned seconds.
The first one is broken on 32-bit architectures as it cannot go past
year 2038. Using timespec64 here makes it behave properly on both 32-bit
and 64-bit architectures, and avoids relying on signed integer overflow
to pass times into the second interface.
The interface used in aac_send_hosttime() however is still problematic
in year 2106 when 32-bit seconds overflow. Hopefully we don't have to
worry about aacraid by that time.
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Reviewed-by: Dave Carroll <david.carroll@xxxxxxxxxxxxx>
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx>
---
drivers/scsi/aacraid/commsup.c | 26 +++++++++++++-------------
1 file changed, 13 insertions(+), 13 deletions(-)
diff --git a/drivers/scsi/aacraid/commsup.c b/drivers/scsi/aacraid/commsup.c
index dfe8e70f8d99..525a652dab48 100644
--- a/drivers/scsi/aacraid/commsup.c
+++ b/drivers/scsi/aacraid/commsup.c
@@ -2383,19 +2383,19 @@ fib_free_out:
goto out;
}
-int aac_send_safw_hostttime(struct aac_dev *dev, struct timeval *now)
+int aac_send_safw_hostttime(struct aac_dev *dev, struct timespec64 *now)
{
struct tm cur_tm;
char wellness_str[] = "<HW>TD\010\0\0\0\0\0\0\0\0\0DW\0\0ZZ";
u32 datasize = sizeof(wellness_str);
- unsigned long local_time;
+ time64_t local_time;
int ret = -ENODEV;
if (!dev->sa_firmware)
goto out;
- local_time = (u32)(now->tv_sec - (sys_tz.tz_minuteswest * 60));
- time_to_tm(local_time, 0, &cur_tm);
+ local_time = (now->tv_sec - (sys_tz.tz_minuteswest * 60));
+ time64_to_tm(local_time, 0, &cur_tm);
cur_tm.tm_mon += 1;
cur_tm.tm_year += 1900;
wellness_str[8] = bin2bcd(cur_tm.tm_hour);
@@ -2412,7 +2412,7 @@ out:
return ret;
}
-int aac_send_hosttime(struct aac_dev *dev, struct timeval *now)
+int aac_send_hosttime(struct aac_dev *dev, struct timespec64 *now)
{
int ret = -ENOMEM;
struct fib *fibptr;
@@ -2424,7 +2424,7 @@ int aac_send_hosttime(struct aac_dev *dev, struct timeval *now)
aac_fib_init(fibptr);
info = (__le32 *)fib_data(fibptr);
- *info = cpu_to_le32(now->tv_sec);
+ *info = cpu_to_le32(now->tv_sec); /* overflow in y2106 */
ret = aac_fib_send(SendHostTime, fibptr, sizeof(*info), FsaNormal,
1, 1, NULL, NULL);
@@ -2496,7 +2496,7 @@ int aac_command_thread(void *data)
}
if (!time_before(next_check_jiffies,next_jiffies)
&& ((difference = next_jiffies - jiffies) <= 0)) {
- struct timeval now;
+ struct timespec64 now;
int ret;
/* Don't even try to talk to adapter if its sick */
@@ -2506,15 +2506,15 @@ int aac_command_thread(void *data)
next_check_jiffies = jiffies
+ ((long)(unsigned)check_interval)
* HZ;
- do_gettimeofday(&now);
+ ktime_get_real_ts64(&now);
/* Synchronize our watches */
- if (((1000000 - (1000000 / HZ)) > now.tv_usec)
- && (now.tv_usec > (1000000 / HZ)))
- difference = (((1000000 - now.tv_usec) * HZ)
- + 500000) / 1000000;
+ if (((NSEC_PER_SEC - (NSEC_PER_SEC / HZ)) > now.tv_nsec)
+ && (now.tv_nsec > (NSEC_PER_SEC / HZ)))
+ difference = (((NSEC_PER_SEC - now.tv_nsec) * HZ)
+ + NSEC_PER_SEC / 2) / NSEC_PER_SEC;
else {
- if (now.tv_usec > 500000)
+ if (now.tv_nsec > NSEC_PER_SEC / 2)
++now.tv_sec;
if (dev->sa_firmware)
--
2.11.0