bcachefs: Fix bch2_read_retry_nodecode()

BCH_READ_NODECODE mode - used by the move paths - really wants to use
only the original rbio, but the retry path really wants to clone - oof.

Make sure to copy the crc of the pointer we read from back to the
original rbio, or we'll see spurious checksum errors later.

Signed-off-by: Kent Overstreet <[email protected]>

Author: Kent Overstreet

fs/bcachefs/io_read.c

@@ -1003,6 +1003,9 @@ int __bch2_read_extent(struct btree_trans *trans, struct bch_read_bio *orig,
 	rbio->promote		= promote;
 	INIT_WORK(&rbio->work, NULL);
 
+	if (flags & BCH_READ_NODECODE)
+		orig->pick = pick;
+
 	rbio->bio.bi_opf	= orig->bio.bi_opf;
 	rbio->bio.bi_iter.bi_sector = pick.ptr.offset;
 	rbio->bio.bi_end_io	= bch2_read_endio;