From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail177-1.suw61.mandrillapp.com ([198.2.177.1]:44513 "EHLO mail177-1.suw61.mandrillapp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750802AbcCAFik (ORCPT ); Tue, 1 Mar 2016 00:38:40 -0500 Received: from pmta06.mandrill.prod.suw01.rsglab.com (127.0.0.1) by mail177-1.suw61.mandrillapp.com id hqkle022rtkm for ; Tue, 1 Mar 2016 05:38:38 +0000 (envelope-from ) From: Subject: Patch "bcache: allows use of register in udev to avoid "device_busy" error." has been added to the 4.4-stable tree To: , , , , , Cc: , Message-Id: <145681071728164@kroah.com> Date: Tue, 01 Mar 2016 05:38:38 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled bcache: allows use of register in udev to avoid "device_busy" error. to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: bcache-allows-use-of-register-in-udev-to-avoid-device_busy-error.patch and it can be found in the queue-4.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From d7076f21629f8f329bca4a44dc408d94670f49e2 Mon Sep 17 00:00:00 2001 From: Gabriel de Perthuis Date: Sun, 29 Nov 2015 18:40:23 -0800 Subject: bcache: allows use of register in udev to avoid "device_busy" error. From: Gabriel de Perthuis commit d7076f21629f8f329bca4a44dc408d94670f49e2 upstream. Allows to use register, not register_quiet in udev to avoid "device_busy" error. The initial patch proposed at https://lkml.org/lkml/2013/8/26/549 by Gabriel de Perthuis does not unlock the mutex and hangs the kernel. See http://thread.gmane.org/gmane.linux.kernel.bcache.devel/2594 for the discussion. Cc: Denis Bychkov Cc: Kent Overstreet Cc: Eric Wheeler Cc: Gabriel de Perthuis Signed-off-by: Jens Axboe Signed-off-by: Greg Kroah-Hartman --- drivers/md/bcache/super.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) --- a/drivers/md/bcache/super.c +++ b/drivers/md/bcache/super.c @@ -1938,6 +1938,8 @@ static ssize_t register_bcache(struct ko else err = "device busy"; mutex_unlock(&bch_register_lock); + if (attr == &ksysfs_register_quiet) + goto out; } goto err; } @@ -1976,8 +1978,7 @@ out: err_close: blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); err: - if (attr != &ksysfs_register_quiet) - pr_info("error opening %s: %s", path, err); + pr_info("error opening %s: %s", path, err); ret = -EINVAL; goto out; } Patches currently in stable-queue which might be from g2p.code@gmail.com are queue-4.4/bcache-allows-use-of-register-in-udev-to-avoid-device_busy-error.patch