Commit 997198ba authored Oct 04, 2016 by Pierre Morel Committed by Jens Axboe Oct 05, 2016

fs/block_dev.c: return the right error in thaw_bdev()



When triggering thaw-filesystems via magic sysrq, the system enters a
loop in do_thaw_one(), as thaw_bdev() still returns success if
bd_fsfreeze_count == 0. To fix this, let thaw_bdev() always return
error (and simplify the code a bit at the same time).

Reviewed-by: Eric Farman <farman@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Pierre Morel <pmorel@linux.vnet.ibm.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Jens Axboe <axboe@fb.com>

parent 1a6fe74d

fs/block_dev.c

+2 −5

Original line number	Diff line number	Diff line
		@@ -299,14 +299,11 @@ int thaw_bdev(struct block_device bdev, struct super_block sb)
		error = sb->s_op->thaw_super(sb);
		else
		error = thaw_super(sb);
		if (error) {
		if (error)
		bdev->bd_fsfreeze_count++;
		mutex_unlock(&bdev->bd_fsfreeze_mutex);
		return error;
		}
		out:
		mutex_unlock(&bdev->bd_fsfreeze_mutex);
		return 0;
		return error;
		}
		EXPORT_SYMBOL(thaw_bdev);