From: Liu Bo <[email protected]> 3.12-stable review patch. If anyone has any objections, please let me know.
=============== commit 29cc83f69c8338ff8fd1383c9be263d4bdf52d73 upstream. Same as normal devices, seed devices should be initialized with fs_info->dev_root as well, otherwise we'll get a NULL pointer crash. Cc: Chris Murphy <[email protected]> Reported-by: Chris Murphy <[email protected]> Signed-off-by: Liu Bo <[email protected]> Signed-off-by: Chris Mason <[email protected]> Signed-off-by: Jiri Slaby <[email protected]> --- fs/btrfs/volumes.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index 258cd6ec3bd2..f0f50531c6c3 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -6051,10 +6051,14 @@ void btrfs_init_devices_late(struct btrfs_fs_info *fs_info) struct btrfs_fs_devices *fs_devices = fs_info->fs_devices; struct btrfs_device *device; - mutex_lock(&fs_devices->device_list_mutex); - list_for_each_entry(device, &fs_devices->devices, dev_list) - device->dev_root = fs_info->dev_root; - mutex_unlock(&fs_devices->device_list_mutex); + while (fs_devices) { + mutex_lock(&fs_devices->device_list_mutex); + list_for_each_entry(device, &fs_devices->devices, dev_list) + device->dev_root = fs_info->dev_root; + mutex_unlock(&fs_devices->device_list_mutex); + + fs_devices = fs_devices->seed; + } } static void __btrfs_reset_dev_stats(struct btrfs_device *dev) -- 2.0.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
