| Message ID | 1458642365-2604-1-git-send-email-luis.henriques@canonical.com |
|---|---|
| State | New |
| Headers | show |
diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c index 72e660cafadd..70db24e41947 100644 --- a/drivers/md/bcache/super.c +++ b/drivers/md/bcache/super.c @@ -1950,10 +1950,12 @@ static ssize_t register_bcache(struct kobject *k, struct kobj_attribute *attr, if (IS_ERR(bdev)) { if (bdev == ERR_PTR(-EBUSY)) { bdev = lookup_bdev(strim(path)); + mutex_lock(&bch_register_lock); if (!IS_ERR(bdev) && bch_is_open(bdev)) err = "device already registered"; else err = "device busy"; + mutex_unlock(&bch_register_lock); if (attr == &ksysfs_register_quiet) goto out; }
This is a note to let you know that I have just added a patch titled bcache: add mutex lock for bch_is_open to the linux-3.16.y-queue branch of the 3.16.y-ckt extended stable tree which can be found at: http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-3.16.y-queue This patch is scheduled to be released in version 3.16.7-ckt26. If you, or anyone else, feels it should not be added to this tree, please reply to this email. For more information about the 3.16.y-ckt tree, see https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable Thanks. -Luis ---8<------------------------------------------------------------ From a442f692f42dedba3aa24c899684fd51bf61c585 Mon Sep 17 00:00:00 2001 From: Jianjian Huo <samuel.huo@gmail.com> Date: Sun, 13 Jul 2014 09:08:59 -0700 Subject: bcache: add mutex lock for bch_is_open commit 789d21dbd9d8889e62c79ec19585fcc97e42ef07 upstream. Since bch_is_open will iterate linked list bch_cache_sets and uncached_devices, it needs bch_register_lock. Signed-off-by: Jianjian Huo <samuel.huo@gmail.com> Cc: Kamal Mostafa <kamal@canonical.com> [ luis: backported to 3.16: adjusted context ] Signed-off-by: Luis Henriques <luis.henriques@canonical.com> --- drivers/md/bcache/super.c | 2 ++ 1 file changed, 2 insertions(+)