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-rw-r--r--drivers/s390/char/tty3270.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/s390/char/tty3270.c b/drivers/s390/char/tty3270.c
index e8afa07f082e..54ea5a01e30d 100644
--- a/drivers/s390/char/tty3270.c
+++ b/drivers/s390/char/tty3270.c
@@ -405,7 +405,10 @@ tty3270_update(struct tty3270 *tp)
if (raw3270_request_add_data(wrq, str, len) != 0)
break;
list_del_init(&s->update);
- sba = s->string + s->len - 3;
+ if (s->string[s->len - 4] == TO_RA)
+ sba = s->string + s->len - 3;
+ else
+ sba = invalid_sba;
}
if (list_empty(&tp->update))
updated |= TTY_UPDATE_LIST;