On Thu, 29 Nov 2012, Sarah Sharp wrote:
> > It is driver-specific. (For example, under certain rare conditions
> > uhci-hcd needs to poll for wakeup events while the controller is
> > suspended.) The USB core does not automatically stop polling when the
> > root hub is suspended; you have to
On Tue, Nov 27, 2012 at 04:36:41PM -0500, Alan Stern wrote:
> On Tue, 27 Nov 2012, Sarah Sharp wrote:
>
> > Do I need to stop the polling when the host controller is suspended and
> > restart it when it's resumed? It seems like OHCI does that, but I can't
> > tell if it's host-specific. Or will
On Tue, 27 Nov 2012, Sarah Sharp wrote:
> Do I need to stop the polling when the host controller is suspended and
> restart it when it's resumed? It seems like OHCI does that, but I can't
> tell if it's host-specific. Or will the USB core just take care of
> stopping and restarting the hub timer
On Mon, Nov 26, 2012 at 01:35:46PM -0500, Alan Stern wrote:
> On Mon, 26 Nov 2012, Sarah Sharp wrote:
>
> > > Is port-disabling the only place where this problem occurs?
> >
> > Probably not.
> >
> > > A more defensive approach would be to copy what ohci-hcd does. When a
> > > port-change inter
On Mon, 26 Nov 2012, Sarah Sharp wrote:
> > Is port-disabling the only place where this problem occurs?
>
> Probably not.
>
> > A more defensive approach would be to copy what ohci-hcd does. When a
> > port-change interrupt occurs, the driver switches over to polling for
> > root-hub status cha
On Fri, Nov 23, 2012 at 12:55:29PM -0500, Alan Stern wrote:
> On Wed, 21 Nov 2012, Sarah Sharp wrote:
>
> > The USB core disables the USB 2.0 ports in several different error
> > cases. It expects that all USB hubs will act like external hubs, and
> > always return an interrupt event if a port ch
On Wed, 21 Nov 2012, Sarah Sharp wrote:
> The USB core disables the USB 2.0 ports in several different error
> cases. It expects that all USB hubs will act like external hubs, and
> always return an interrupt event if a port change bit is set. External
> USB 2.0 and USB 3.0 hubs are level-trigge
