3.13.11-ckt34 -stable review patch. If anyone has any objections, please let me know.
---8<------------------------------------------------------------
From: Jianjian Huo <samuel.huo@xxxxxxxxx>
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@xxxxxxxxx>
Signed-off-by: Kamal Mostafa <kamal@xxxxxxxxxxxxx>
---
drivers/md/bcache/super.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c
index e984894..0b937fb 100644
--- a/drivers/md/bcache/super.c
+++ b/drivers/md/bcache/super.c
@@ -1921,10 +1921,12 @@ 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);
}
goto err;
}
--
1.9.1
--
To unsubscribe from this list: send the line "unsubscribe stable" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html