linux-kernel - Re: [linux-pm] s2ram slow (radeon) / failing (usb)

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Fri, 7 May 2010 10:29:25 +0200 (CEST)
From:	Jiri Kosina <jkosina@...e.cz>
To:	Alan Stern <stern@...land.harvard.edu>
Cc:	Bruno Prémont <bonbons@...ux-vserver.org>,
	Oliver Neukum <oneukum@...e.de>,
	linux-pm@...ts.linux-foundation.org,
	list <linux-usb@...r.kernel.org>,
	Kernel development list <linux-kernel@...r.kernel.org>,
	jslaby@...e.cz
Subject: Re: [linux-pm] s2ram slow (radeon) / failing (usb)

On Thu, 6 May 2010, Alan Stern wrote:

> On Thu, 6 May 2010, Bruno [UTF-8] PrÃ©mont wrote:
> 
> > > Bruno, can you confirm that the hang occurs during one of those 
> > > cancel_work_sync() calls?
> > 
> > No, it's not one of the cancel_work_sync() that hangs but it's the
> > del_timer_sync() right before them that hangs!
> > (del_timer_sync() also hangs if I put it last, so the cancel_work_sync()
> > don't hang anything)
> > 
> > static void hid_cancel_delayed_stuff(struct usbhid_device *usbhid)
> > {
> > 	del_timer_sync(&usbhid->io_retry); /* this one never returns */
> > 	cancel_work_sync(&usbhid->restart_work);
> > 	cancel_work_sync(&usbhid->reset_work);
> > }
> 
> Okay, I see what the problem is.  In usbhid_start() there's a bunch of
> statements initializing parts of the usbhid structure.  When probing
> fails those statements don't get executed, so the timer and workqueue
> things aren't set up properly.
> 
> This patch should fix it.

Indeed, good catch, thanks a lot Alan!

Could you please send to me with your Signed-off-by: line and short 
changelog, so that I could apply it with proper credit being given to you?

And Bruno, thanks a lot for excellent testing efforts.

-- 
Jiri Kosina
SUSE Labs, Novell Inc.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/