linux-kernel - RE: [BUG] usb_dev_resume returns -113 due to work items queued by usb on pm

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Date:	Tue, 19 Aug 2014 10:08:35 +0000
From:	"Du, ChangbinX" <changbinx.du@...el.com>
To:	Alan Stern <stern@...land.harvard.edu>
CC:	"rjw@...ysocki.net" <rjw@...ysocki.net>,
	"gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
	"Nyman, Mathias" <mathias.nyman@...el.com>,
	"Brown, Len" <len.brown@...el.com>, "pavel@....cz" <pavel@....cz>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
	"Wu, Hao" <hao.wu@...el.com>
Subject: RE: [BUG]  usb_dev_resume returns -113 due to work items queued by
 usb on pm_wq is not executed before suspending.

> Commit d6236f6d1d88 prevents the roothub resuming work item from being
> queued.
> 
> > 4) We force system suspending process aborted (by modifying code) just
> after the usb
> >   Device suspend callback is invoked.
> > 5) Then PM core will call resume callback of the usb device to recovery. On
> this step
> >   usb_dev_resume() invokes and it return -113 error. Because the
> can_submit flag of
> >   root hub is 0. Root hub resuming work item is still pending.
> 
> I still think that commit has already fixed your problem.
> 
> Alan Stern

Yes, thanks. Issue didn't reproduce after applying that patch.
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