Re: 3.0-rc2: mei breaks suspend

From: Maarten Lankhorst
Date: Thu Jun 16 2011 - 05:20:06 EST

Hi Stefan,

2011/6/16 Stefan Seyfried <stefan.seyfried@xxxxxxxxxxxxxx>:
> Hi,
> having the "mei" driver loaded, which happened automatically on my
> ThinkPad X200s, successfully prevents any suspend efforts:
> [39736.728116] pci_pm_suspend(): mei_pci_suspend+0x0/0xc0 [mei] returns 9999
> The code has not changed since 3.0-rc2, so I did not try compiling latest
> git.
> Jiri Slaby hinted that this code in drivers/staging/mei/wd.c is to blame:
> 169 Â Â Â Â ret = wait_event_interruptible_timeout(dev->wait_stop_wd,
> 170 Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â dev->wd_stopped, 10 * HZ);
> I am, however, not familiar enough with timers and stuff to immediately
> spot the problem.
> Removing the module before suspend is a workaround.
> This could be considered a regression, as suspend worked very well before
> this driver was introduced :-)
Does changing that to wait_event_timeout work? My guess is that is
what he meant.

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