I agree that the bugfix will do no harm on older versions. I have however not seen this particular deadlock occurring on versions before the kthread conversion: the thread termination works differently here (not by polling), so the fix is probably not necessary on older versions. Apologies for not responding to this before: these were my first patches and I had not realized bugfixes would also be backported to older versions. Best Regards, Arjan Mels ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ Arjan Mels Principal Engineer Device Physics / Wafer Technology and Foundry Organization (WT&FO) / Operations NXP Semiconductors FB 3.057, Gerstweg 2, 6534AE Nijmegen, The Netherlands Phone : + 31 24 353 5330 E-mail : arjan.mels@nxp.com XFB : nlv07682@seri02 -----Original Message----- From: Greg KH [mailto:gregkh@suse.de] Sent: Monday, April 18, 2011 08:03 To: Arnd Bergmann Cc: linux-kernel@vger.kernel.org; stable@kernel.org; stable-review@kernel.org; torvalds@linux-foundation.org; akpm@linux-foundation.org; alan@lxorguk.ukuu.org.uk; Arjan Mels; Takahiro Hirofuchi; Max Vozeler Subject: Re: [12/74] staging: usbip: bugfixes related to kthread conversion On Sun, Apr 17, 2011 at 10:15:01PM +0200, Arnd Bergmann wrote: > On Wednesday 13 April 2011, Greg KH wrote: > > From: Arjan Mels > > > > commit d2dd0b07c3e725d386d20294ec906f7ddef207fa upstream. > > > > When doing a usb port reset do a queued reset instead to prevent a > > deadlock: the reset will cause the driver to unbind, causing the > > usb_driver_lock_for_reset to stall. > > > > Signed-off-by: Arjan Mels > > Cc: Takahiro Hirofuchi > > Cc: Max Vozeler > > Cc: Arnd Bergmann > > Signed-off-by: Greg Kroah-Hartman > > > > I think either the subject line is misleading or the patch is not > needed in -stable. The kthread conversion was done in 2.6.38, so > any bug introduced by it would not need to be fixed in an earlier > version, afaict. Yes, the Subject: was incorrect, and I only realized it after it was committed to the tree, sorry. The bug fixes were still real. thanks, greg k-h {.n++%ݶw{.n+{G{ayʇڙ,jfhz_(階ݢj"mG?&~iOzv^m ?I