redonkable
/
alistair23-linux
1
0
Fork 0
Code Releases Activity

bcache: allows use of register in udev to avoid "device_busy" error. 

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
<g2p.code@gmail.com> 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 <manover@gmail.com>
Cc: Kent Overstreet <kent.overstreet@gmail.com>
Cc: Eric Wheeler <bcache@linux.ewheeler.net>
Cc: Gabriel de Perthuis <g2p.code@gmail.com>
Cc: stable@vger.kernel.org

Signed-off-by: Jens Axboe <axboe@fb.com>
hifive-unleashed-5.1
Gabriel de Perthuis 2015-11-29 18:40:23 -08:00 committed by Jens Axboe
parent 2ecf0cdb2b
commit d7076f2162
1 changed files with 3 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/md/bcache/super.c
View File

@ -1938,6 +1938,8 @@ static ssize_t register_bcache(struct kobject *k, struct kobj_attribute *attr,
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;
}