add Alan Stern
On Thursday, September 17, 2015 11:09 AM, WEN Pingbo wrote:
The millisecond of the last second will be normal if tv_sec is overflowed. But for y2038 consistency and demonstration purpose, and avoiding further risks, we need to remove 'timeval' in this driver, to avoid similair problems.
V2 Updates:
- using monotonic time here by replacing getnstimeofday() with ktime_get_ts64(), to avoid leap second issues. The frame time in USB is always 1ms, no matter what speed, so ktime_get_ts64() have enough resolution to cover this.
- using NSEC_PER_MSEC instead of hard code.
Signed-off-by: Pingbo Wen pingbo.wen@linaro.org Cc: Y2038 y2038@lists.linaro.org Cc: linux-kernel@vger.kernel.org Cc: Arnd Bergmann arnd@arndb.de Cc: Felipe Balbi balbi@ti.com Signed-off-by: WEN Pingbo pingbo.wen@linaro.org
drivers/usb/gadget/udc/dummy_hcd.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/usb/gadget/udc/dummy_hcd.c b/drivers/usb/gadget/udc/dummy_hcd.c index 1379ad4..6d1ed35 100644 --- a/drivers/usb/gadget/udc/dummy_hcd.c +++ b/drivers/usb/gadget/udc/dummy_hcd.c @@ -833,10 +833,10 @@ static const struct usb_ep_ops dummy_ep_ops = { /* there are both host and device side versions of this call ... */ static int dummy_g_get_frame(struct usb_gadget *_gadget) {
- struct timeval tv;
- struct timespec64 tv;
- do_gettimeofday(&tv);
- return tv.tv_usec / 1000;
- ktime_get_ts64(&tv);
- return tv.tv_nsec / NSEC_PER_MSEC;
} static int dummy_wakeup(struct usb_gadget *_gadget)