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authorDavid Sterba <dsterba@suse.com>2018-06-20 20:51:28 +0300
committerDavid Sterba <dsterba@suse.com>2018-07-13 15:55:46 +0300
commit20c5bbc640cdf8e23947990ab98f5ba950a3e1b0 (patch)
tree18582dc8644adb26d941e2e74fb4cfc53bed0986 /fs
parente4e7ede739f7fb468686dfffa2d1e35dca35bacd (diff)
downloadlinux-20c5bbc640cdf8e23947990ab98f5ba950a3e1b0.tar.xz
btrfs: restore uuid_mutex in btrfs_open_devices
Commit 542c5908abfe84f7b4c1 ("btrfs: replace uuid_mutex by device_list_mutex in btrfs_open_devices") switched to device_list_mutex as we need that for the device list traversal, but we also need uuid_mutex to protect access to fs_devices::opened to be consistent with other users of that. Fixes: 542c5908abfe84f7b4c1 ("btrfs: replace uuid_mutex by device_list_mutex in btrfs_open_devices") Reviewed-by: Anand Jain <anand.jain@oracle.com> Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/btrfs/volumes.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index e034ad9e23b4..1da162928d1a 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -1146,6 +1146,7 @@ int btrfs_open_devices(struct btrfs_fs_devices *fs_devices,
{
int ret;
+ mutex_lock(&uuid_mutex);
mutex_lock(&fs_devices->device_list_mutex);
if (fs_devices->opened) {
fs_devices->opened++;
@@ -1155,6 +1156,7 @@ int btrfs_open_devices(struct btrfs_fs_devices *fs_devices,
ret = open_fs_devices(fs_devices, flags, holder);
}
mutex_unlock(&fs_devices->device_list_mutex);
+ mutex_unlock(&uuid_mutex);
return ret;
}