On Tue, 2021-05-11 at 12:39 -0400, Alan Stern wrote: > On Tue, May 11, 2021 at 06:15:22PM +0800, Chunfeng Yun wrote: > > This may happen if the port becomes resume status exactly > > when usb_port_resume() gets port status, it still need provide > > a TRSMCRY time before access the device. > > > > Reported-by: Tianping Fang <tianping.fang@xxxxxxxxxxxx> > > Signed-off-by: Chunfeng Yun <chunfeng.yun@xxxxxxxxxxxx> > > This should also say: > > CC: <stable@xxxxxxxxxxxxxxx> OK, thanks > > > --- > > drivers/usb/core/hub.c | 6 +++--- > > 1 file changed, 3 insertions(+), 3 deletions(-) > > > > diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c > > index b2bc4b7c4289..fc7d6cdacf16 100644 > > --- a/drivers/usb/core/hub.c > > +++ b/drivers/usb/core/hub.c > > @@ -3642,9 +3642,6 @@ int usb_port_resume(struct usb_device *udev, pm_message_t msg) > > * sequence. > > */ > > status = hub_port_status(hub, port1, &portstatus, &portchange); > > - > > - /* TRSMRCY = 10 msec */ > > - msleep(10); > > } > > > > SuspendCleared: > > @@ -3659,6 +3656,9 @@ int usb_port_resume(struct usb_device *udev, pm_message_t msg) > > usb_clear_port_feature(hub->hdev, port1, > > USB_PORT_FEAT_C_SUSPEND); > > } > > + > > + /* TRSMRCY = 10 msec */ > > + msleep(10); > > } > > > > if (udev->persist_enabled) > > Acked-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
