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authorJiri Slaby (SUSE) <jirislaby@kernel.org>2023-08-16 12:55:24 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2023-08-22 14:58:15 +0200
commit4a8d99a409d3d194527674a896362992a171cd7b (patch)
tree4b0276f45f804c51061bf395d43811e1c8d09026 /drivers/tty
parentc26405fd289b74225b111b8f23e9e7eae1a02513 (diff)
tty: tty_buffer: warn if losing flags in __tty_insert_flip_string_flags()
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> Link: https://lore.kernel.org/r/20230816105530.3335-5-jirislaby@kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
-rw-r--r--drivers/tty/tty_buffer.c3
1 files changed, 3 insertions, 0 deletions
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;