btrfs: remove pointless iocb::ki_pos addition in btrfs_encoded_read()

iocb->ki_pos isn't used after this function, so there's no point in
changing its value.

Signed-off-by: Mark Harmstone <maharmstone@fb.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

Author: maharmstone

fs/btrfs/inode.c

@@ -9251,7 +9251,7 @@ ssize_t btrfs_encoded_read(struct kiocb *iocb, struct iov_iter *iter,
 		ret = btrfs_encoded_read_inline(iocb, iter, start, lockend,
 						&cached_state, extent_start,
 						count, encoded, &unlocked);
-		goto out;
+		goto out_em;
 	}
 
 	/*
@@ -9317,9 +9317,6 @@ ssize_t btrfs_encoded_read(struct kiocb *iocb, struct iov_iter *iter,
 						 &unlocked);
 	}
 
-out:
-	if (ret >= 0)
-		iocb->ki_pos += encoded->len;
 out_em:
 	free_extent_map(em);
 out_unlock_extent: