Btrfs: Only open block devices once during mount -o subvol=
btrfs_open_devices needed a check to see if the device was already open. Signed-off-by: Chris Mason <chris.mason@oracle.com>hifive-unleashed-5.1
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a68d5933a0
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c1c4d91c38
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@ -196,6 +196,9 @@ int btrfs_open_devices(struct btrfs_fs_devices *fs_devices,
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mutex_lock(&uuid_mutex);
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mutex_lock(&uuid_mutex);
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list_for_each(cur, head) {
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list_for_each(cur, head) {
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device = list_entry(cur, struct btrfs_device, dev_list);
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device = list_entry(cur, struct btrfs_device, dev_list);
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if (device->bdev)
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continue;
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bdev = open_bdev_excl(device->name, flags, holder);
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bdev = open_bdev_excl(device->name, flags, holder);
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if (IS_ERR(bdev)) {
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if (IS_ERR(bdev)) {
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