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| author | Arnd Bergmann <arnd@arndb.de> | 2017-11-07 11:39:57 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-11-07 15:34:08 +0100 |
| commit | 6c51441cd0710330ccdb8dd0288e5316256d1c8e (patch) | |
| tree | 82f7475d202cd09c0beabac8455b1c90afc04d36 /drivers/usb | |
| parent | 15081e85cca45e495144eb0c108926e629fde486 (diff) | |
| download | linux-6c51441cd0710330ccdb8dd0288e5316256d1c8e.tar.gz linux-6c51441cd0710330ccdb8dd0288e5316256d1c8e.tar.bz2 linux-6c51441cd0710330ccdb8dd0288e5316256d1c8e.zip | |
usbip: use monotonic timestamps
This gets rid of the deprecated do_gettimeofday() function in usbip.
The comment above vgadget_get_frame() mentions that it suffers
from issues with the time jumps due to suspend and settimeofday,
so I'm changing it to use ktime_get_ts64() to use monotonic times
that don't have this problem.
I couldn't tell whether we should use CLOCK_MONOTONIC or
CLOCK_MONOTONIC_RAW here, the difference being the exact rate
when correcting for NTP. I picked monotonic time since it doesn't
change the speed to the existing code and should be better
synchronized with other machines we talk to.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Krzysztof Opasiak <k.opasiak@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/usbip/vudc.h | 2 | ||||
| -rw-r--r-- | drivers/usb/usbip/vudc_dev.c | 7 | ||||
| -rw-r--r-- | drivers/usb/usbip/vudc_sysfs.c | 2 |
3 files changed, 5 insertions, 6 deletions
diff --git a/drivers/usb/usbip/vudc.h b/drivers/usb/usbip/vudc.h index 44fb24193acd..8282362176d5 100644 --- a/drivers/usb/usbip/vudc.h +++ b/drivers/usb/usbip/vudc.h @@ -105,7 +105,7 @@ struct vudc { struct usbip_device ud; struct transfer_timer tr_timer; - struct timeval start_time; + struct timespec64 start_time; struct list_head urb_queue; diff --git a/drivers/usb/usbip/vudc_dev.c b/drivers/usb/usbip/vudc_dev.c index 16fb4f85a6f6..fe07e799e481 100644 --- a/drivers/usb/usbip/vudc_dev.c +++ b/drivers/usb/usbip/vudc_dev.c @@ -136,15 +136,14 @@ struct vep *vudc_find_endpoint(struct vudc *udc, u8 address) /* gadget ops */ -/* FIXME - this will probably misbehave when suspend/resume is added */ static int vgadget_get_frame(struct usb_gadget *_gadget) { - struct timeval now; + struct timespec64 now; struct vudc *udc = usb_gadget_to_vudc(_gadget); - do_gettimeofday(&now); + ktime_get_ts64(&now); return ((now.tv_sec - udc->start_time.tv_sec) * 1000 + - (now.tv_usec - udc->start_time.tv_usec) / 1000) + (now.tv_nsec - udc->start_time.tv_nsec) / NSEC_PER_MSEC) & 0x7FF; } diff --git a/drivers/usb/usbip/vudc_sysfs.c b/drivers/usb/usbip/vudc_sysfs.c index 7d978b824ed4..49e0123caa53 100644 --- a/drivers/usb/usbip/vudc_sysfs.c +++ b/drivers/usb/usbip/vudc_sysfs.c @@ -162,7 +162,7 @@ static ssize_t store_sockfd(struct device *dev, struct device_attribute *attr, udc->ud.status = SDEV_ST_USED; spin_unlock_irq(&udc->ud.lock); - do_gettimeofday(&udc->start_time); + ktime_get_ts64(&udc->start_time); v_start_timer(udc); udc->connected = 1; } else { |