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tty: tty_buffer: warn if losing flags in __tty_insert_flip_string_flags()

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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>
This commit is contained in:
Jiri Slaby (SUSE) 2023-08-16 12:55:24 +02:00 committed by Greg Kroah-Hartman
parent c26405fd28
commit 4a8d99a409
1 changed files with 3 additions and 0 deletions
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3
drivers/tty/tty_buffer.c
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@ -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;