Re: hub.c port power handling on over-current
Alan Stern <[email protected]>
| Newsgroups | gmane.linux.usb.devel |
|---|---|
| Message-ID | <[email protected]> |
On Fri, 25 May 2007, David Brownell wrote: > I'd have to check, but I think that Linux won't currently turn > off per-port power unless the host controller reports that it > actually supports per-port power switching. And most EHCI > implementations don't report that in the hardware, so Linux > won't power it off ... In fact, Linux doesn't do very much in response to an overcurrent-change status. The hub driver clears the overcurrent-change feature and then tells the hub to enable power on all ports. It never tries to turn off port power, under any circumstances. Alan Stern ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ [email protected] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel