Hi,
On Monday, 25 September 2006 21:40, Alan Stern wrote:
> Greg and Andrew:
>
> This series of patches completely reworks the way ohci-hcd carries out
> root-hub autosuspends. The existing code is not compatible with the new
> core USB autosuspend mechanism.
>
> Patch 1 is a simple one-line change to usbcore with no harmful effects.
> It can go directly into both Greg's and Andrew's trees.
>
> Patch 2 removes the existing autosuspend code in ohci-hcd. It is
> essentially the same as a patch Rafael tried out; he confirmed that it got
> ohci-hcd to work on his machine both with CONFIG_USB_SUSPEND unset and
> with it set. This patch also can go directly into both trees. If anybody
> has been having trouble using their OHCI controllers with the recent -mm
> kernels, this should fix it. The downside is that now the controllers
> won't automatically get turned off when no devices are attached.
> Hopefully this state of affairs will be relatively short-lived.
>
> Patch 3 adds new "auto-stop" code to ohci-hcd. This will stop the
> controller only when no devices are attached, unlike the existing code
> which will also suspend the controller when all the attached devices are
> themselves suspended. That's okay, because "auto-stop" is meant to be
> used when CONFIG_USB_SUSPEND isn't set -- which means attached devices
> would _never_ be suspended.
>
> Patch 3 is much more experimental than the first two, and probably also
> more controversial (I expect David will have a lot to say about it, even
> if no one else does). In fact, I won't even CC: Andrew on this one; let's
> just keep it in the USB tree at first. More details will appear in the
> patch message.
>
> Alan Stern
>
> P.S.: Raphael, these three patches will apply to 2.6.18-mm1. In addition
> to these you might want to add this patch, which hasn't yet been accepted:
>
> http://marc.theaimsgroup.com/?l=linux-usb-devel&m=115867525727045&w=2
I'm running 2.6.18-mm1 with the three patches and the additional one applied.
So far, everything has been working just fine.
Greetings,
Rafael
--
You never change things by fighting the existing reality.
R. Buckminster Fuller
-------------------------------------------------------------------------
Take Surveys. Earn Cash. Influence the Future of IT
Join SourceForge.net's Techsay panel and you'll get the chance to share your
opinions on IT & business topics through brief surveys -- and earn cash
http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV
_______________________________________________
linux-usb-devel@lists.sourceforge.net
To unsubscribe, use the last form field at:
https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
