firmware download competes with system sleep

[Marek Vasut]

Dne Pá 18. června 2010 23:30:12 Paul Fox napsal(a):
> i'm not sure this is really a libertas issue -- it might
> be more of a USB issue.  in any case, on an XO-1 laptop
> running the OLPC variant of 2.6.31, there's a problem if a firmware
> download is happening at the time that the system tries to suspend.
> the firmware task refuses to be "frozen", and the system hangs
> with:
> [  375.148013] Freezing of tasks failed after 20.00 seconds (1 tasks
> refusing to freeze):
> 
> there's a full log attached to http://dev.laptop.org/ticket/10176,
> where you can see that device (re)discovery starts in the middle
> of the system trying to suspend.
> 
> as i implied above -- i'm not really sure where to start on this.
> the XO is a little bit unique in that we do a hard reset of the
> wlan device when we detect excessive command timeouts.  it's
> possible that this changes the sequencing of device discovery, but
> i'd think any device insertion while the system is heading to sleep
> might be an issue.
> 

Hi, maybe CC linux-usb ?

linux-usb at vger.kernel.org

> paul
> =---------------------
>  paul fox, pgf at laptop.org
> 
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