diff mbox series

[04/10] tty: tty_buffer: warn if losing flags in __tty_insert_flip_string_flags()

Message ID 20230816105530.3335-5-jirislaby@kernel.org
State New
Headers show
Series tty: tty_buffer: cleanup | expand

Commit Message

Jiri Slaby Aug. 16, 2023, 10:55 a.m. UTC 
And add a WARN_ON_ONCE(need_flags) to make sure we are not losing flags
in __tty_insert_flip_string_flags().

Signed-off-by: Jiri Slaby (SUSE) <jirislaby@kernel.org>
---
 drivers/tty/tty_buffer.c | 3 +++
 1 file changed, 3 insertions(+)
diff mbox series

Patch

diff --git a/drivers/tty/tty_buffer.c b/drivers/tty/tty_buffer.c
index 94a88dc05a54..c101b4ab737e 100644
--- a/drivers/tty/tty_buffer.c
+++ b/drivers/tty/tty_buffer.c
@@ -325,6 +325,9 @@  int __tty_insert_flip_string_flags(struct tty_port *port, const u8 *chars,
 			flags += space;
 		} else if (tb->flags) {
 			memset(flag_buf_ptr(tb, tb->used), flags[0], space);
+		} else {
+			/* tb->flags should be available once requested */
+			WARN_ON_ONCE(need_flags);
 		}
 
 		tb->used += space;