bcachefs: fix last_seq_ondisk

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

fs/bcachefs/journal_io.c

@@ -1207,6 +1207,7 @@ static void journal_write_done(struct closure *cl)
 	struct bch_devs_list devs =
 		bch2_extent_devs(bkey_i_to_s_c_extent(&w->key));
 	u64 seq = le64_to_cpu(w->data->seq);
+	u64 last_seq = le64_to_cpu(w->data->last_seq);
 
 	if (!devs.nr) {
 		bch_err(c, "unable to write journal to sufficient devices");
@@ -1219,7 +1220,7 @@ static void journal_write_done(struct closure *cl)
 	bch2_time_stats_update(j->write_time, j->write_start_time);
 
 	spin_lock(&j->lock);
-	j->last_seq_ondisk = seq;
+	j->last_seq_ondisk	= last_seq;
 	if (seq >= j->pin.front)
 		journal_seq_pin(j, seq)->devs = devs;