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SubjectRe: [PATCH 3/8] [media] solo6x10: use ktime_get_ts64() for time sync
On 27/Nov/2017 14:19, Arnd Bergmann wrote:
> solo6x10 correctly deals with time stamps and will never
> suffer from overflows, but it uses the deprecated 'struct timespec'
> type and 'ktime_get_ts()' interface to read the monotonic clock.
>
> This changes it to use ktime_get_ts64() instead, so we can
> eventually remove ktime_get_ts().
>
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
> ---
> drivers/media/pci/solo6x10/solo6x10-core.c | 17 +++++++++--------
> 1 file changed, 9 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/media/pci/solo6x10/solo6x10-core.c b/drivers/media/pci/solo6x10/solo6x10-core.c
> index ca0873e47bea..19ffd2ed3cc7 100644
> --- a/drivers/media/pci/solo6x10/solo6x10-core.c
> +++ b/drivers/media/pci/solo6x10/solo6x10-core.c
> @@ -47,18 +47,19 @@ MODULE_PARM_DESC(full_eeprom, "Allow access to full 128B EEPROM (dangerous)");
>
> static void solo_set_time(struct solo_dev *solo_dev)
> {
> - struct timespec ts;
> + struct timespec64 ts;
>
> - ktime_get_ts(&ts);
> + ktime_get_ts64(&ts);
>
> - solo_reg_write(solo_dev, SOLO_TIMER_SEC, ts.tv_sec);
> - solo_reg_write(solo_dev, SOLO_TIMER_USEC, ts.tv_nsec / NSEC_PER_USEC);
> + /* no overflow because we use monotonic timestamps */
> + solo_reg_write(solo_dev, SOLO_TIMER_SEC, (u32)ts.tv_sec);
> + solo_reg_write(solo_dev, SOLO_TIMER_USEC, (u32)ts.tv_nsec / NSEC_PER_USEC);
> }
>
> static void solo_timer_sync(struct solo_dev *solo_dev)
> {
> u32 sec, usec;
> - struct timespec ts;
> + struct timespec64 ts;
> long diff;
>
> if (solo_dev->type != SOLO_DEV_6110)
> @@ -72,11 +73,11 @@ static void solo_timer_sync(struct solo_dev *solo_dev)
> sec = solo_reg_read(solo_dev, SOLO_TIMER_SEC);
> usec = solo_reg_read(solo_dev, SOLO_TIMER_USEC);
>
> - ktime_get_ts(&ts);
> + ktime_get_ts64(&ts);
>
> - diff = (long)ts.tv_sec - (long)sec;
> + diff = (s32)ts.tv_sec - (s32)sec;
> diff = (diff * 1000000)
> - + ((long)(ts.tv_nsec / NSEC_PER_USEC) - (long)usec);
> + + ((s32)(ts.tv_nsec / NSEC_PER_USEC) - (s32)usec);
>
> if (diff > 1000 || diff < -1000) {
> solo_set_time(solo_dev);
> --
> 2.9.0
>

Signed-off-by: Ismael Luceno <ismael@iodev.co.uk>
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