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-rw-r--r--fs/btrfs/dev-replace.c3
-rw-r--r--fs/btrfs/volumes.c6
2 files changed, 6 insertions, 3 deletions
diff --git a/fs/btrfs/dev-replace.c b/fs/btrfs/dev-replace.c
index 5aebedf12b5f..c93eec9ca433 100644
--- a/fs/btrfs/dev-replace.c
+++ b/fs/btrfs/dev-replace.c
@@ -569,7 +569,8 @@ static int btrfs_dev_replace_finishing(struct btrfs_fs_info *fs_info,
ASSERT(list_empty(&src_device->resized_list));
tgt_device->commit_total_bytes = src_device->commit_total_bytes;
tgt_device->commit_bytes_used = src_device->bytes_used;
- if (fs_info->sb->s_bdev == src_device->bdev)
+ if (fs_info->sb->s_bdev &&
+ (fs_info->sb->s_bdev == src_device->bdev))
fs_info->sb->s_bdev = tgt_device->bdev;
if (fs_info->fs_devices->latest_bdev == src_device->bdev)
fs_info->fs_devices->latest_bdev = tgt_device->bdev;
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index e43b01e438b1..41bc384f3483 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -1848,7 +1848,8 @@ int btrfs_rm_device(struct btrfs_root *root, char *device_path, u64 devid)
next_device = list_entry(root->fs_info->fs_devices->devices.next,
struct btrfs_device, dev_list);
- if (device->bdev == root->fs_info->sb->s_bdev)
+ if (root->fs_info->sb->s_bdev &&
+ (root->fs_info->sb->s_bdev == device->bdev))
root->fs_info->sb->s_bdev = next_device->bdev;
if (device->bdev == root->fs_info->fs_devices->latest_bdev)
root->fs_info->fs_devices->latest_bdev = next_device->bdev;
@@ -1996,7 +1997,8 @@ void btrfs_destroy_dev_replace_tgtdev(struct btrfs_fs_info *fs_info,
next_device = list_entry(fs_info->fs_devices->devices.next,
struct btrfs_device, dev_list);
- if (tgtdev->bdev == fs_info->sb->s_bdev)
+ if (fs_info->sb->s_bdev &&
+ (tgtdev->bdev == fs_info->sb->s_bdev))
fs_info->sb->s_bdev = next_device->bdev;
if (tgtdev->bdev == fs_info->fs_devices->latest_bdev)
fs_info->fs_devices->latest_bdev = next_device->bdev;
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