loop: move lo_set_size() out of queue freeze

JIRA: https://issues.redhat.com/browse/RHEL-88159

commit 4bb08cf
Author: Ming Lei <ming.lei@redhat.com>
Date:   Wed Jun 11 16:49:38 2025 +0800

    loop: move lo_set_size() out of queue freeze

    It isn't necessary to freeze queue for updating disk size given submit_bio()
    doesn't grab queue usage counter for checking eod.

    Also many driver won't freeze queue for calling set_capacity_and_notify().

    Move lo_set_size() out of queue freeze for fixing many lockdep warning
    report.

    Link: https://lore.kernel.org/linux-block/67ea99e0.050a0220.3c3d88.0042.GAE@google.com/
    Reported-by: syzbot+9dd7dbb1a4b915dee638@syzkaller.appspotmail.com
    Signed-off-by: Ming Lei <ming.lei@redhat.com>
    Link: https://lore.kernel.org/r/20250611084938.108829-1-ming.lei@redhat.com
    Signed-off-by: Jens Axboe <axboe@kernel.dk>

Signed-off-by: Ming Lei <ming.lei@redhat.com>

Author: Ming Lei

drivers/block/loop.c

@@ -1248,19 +1248,18 @@ loop_set_status(struct loop_device *lo, const struct loop_info64 *info)
 	lo->lo_flags &= ~LOOP_SET_STATUS_CLEARABLE_FLAGS;
 	lo->lo_flags |= (info->lo_flags & LOOP_SET_STATUS_SETTABLE_FLAGS);
 
-	if (size_changed) {
-		loff_t new_size = get_size(lo->lo_offset, lo->lo_sizelimit,
-					   lo->lo_backing_file);
-		loop_set_size(lo, new_size);
-	}
-
 	/* update the direct I/O flag if lo_offset changed */
 	loop_update_dio(lo);
 
 out_unfreeze:
 	blk_mq_unfreeze_queue(lo->lo_queue, memflags);
 	if (partscan)
 		clear_bit(GD_SUPPRESS_PART_SCAN, &lo->lo_disk->state);
+	if (!err && size_changed) {
+		loff_t new_size = get_size(lo->lo_offset, lo->lo_sizelimit,
+					   lo->lo_backing_file);
+		loop_set_size(lo, new_size);
+	}
 out_unlock:
 	mutex_unlock(&lo->lo_mutex);
 	if (partscan)