From 542c5908abfe84f7b4c1717492ecc92ea0ea328d Mon Sep 17 00:00:00 2001 From: Anand Jain Date: Thu, 12 Apr 2018 10:29:34 +0800 Subject: [PATCH] btrfs: replace uuid_mutex by device_list_mutex in btrfs_open_devices btrfs_open_devices() is using the uuid_mutex, but as btrfs_open_devices is just limited to openning all the devices under for given fsid, so we don't need uuid_mutex. Instead it should hold the device_list_mutex as it updates the members of the btrfs_fs_devices and btrfs_device and not the whole fs_devs list. Signed-off-by: Anand Jain Reviewed-by: David Sterba [ update changelog ] Signed-off-by: David Sterba --- fs/btrfs/volumes.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index 6eec1e3f9083..271d9be6e1da 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -1146,7 +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++; ret = 0; @@ -1154,7 +1154,8 @@ int btrfs_open_devices(struct btrfs_fs_devices *fs_devices, list_sort(NULL, &fs_devices->devices, devid_cmp); ret = open_fs_devices(fs_devices, flags, holder); } - mutex_unlock(&uuid_mutex); + mutex_unlock(&fs_devices->device_list_mutex); + return ret; } -- 2.30.2