From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Message-Id: <20120527002617.366004498@linuxfoundation.org> Date: Sun, 27 May 2012 09:26:36 +0900 From: Greg KH To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: torvalds@linux-foundation.org, akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk, Oliver Neukum , =?UTF-8?q?Bj=C3=B8rn=20Mork?= Subject: [ 23/55] USB: cdc-wdm: poll must return POLLHUP if device is gone In-Reply-To: <20120527005203.GA2146@kroah.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: 3.0-stable review patch. If anyone has any objections, please let me know. ------------------ From: Bjørn Mork commit 616b6937e348ef2b4c6ea5fef2cd3c441145efb0 upstream. Else the poll will be restarted indefinitely in a tight loop, preventing final device cleanup. Cc: Oliver Neukum Signed-off-by: Bjørn Mork Signed-off-by: Greg Kroah-Hartman --- drivers/usb/class/cdc-wdm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/usb/class/cdc-wdm.c +++ b/drivers/usb/class/cdc-wdm.c @@ -511,7 +511,7 @@ static unsigned int wdm_poll(struct file spin_lock_irqsave(&desc->iuspin, flags); if (test_bit(WDM_DISCONNECTING, &desc->flags)) { - mask = POLLERR; + mask = POLLHUP | POLLERR; spin_unlock_irqrestore(&desc->iuspin, flags); goto desc_out; }