[PATCH v2] tty: Add comments for tty-ldisc module loading logic

[Zijun Hu]

Current tty-ldisc module loading logic within tty_ldisc_get()
is prone to mislead beginner that the module is able to be loaded
by a user without capability CAP_SYS_MODULE, add comments to make
the logic easy to undertand.

Signed-off-by: Zijun Hu <quic_zijuhu@xxxxxxxxxxx>
---
Changes in v2:
- Remove condition checking changes

 drivers/tty/tty_ldisc.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/tty/tty_ldisc.c b/drivers/tty/tty_ldisc.c
index 3f68e213df1f..34526ffaccbc 100644
--- a/drivers/tty/tty_ldisc.c
+++ b/drivers/tty/tty_ldisc.c
@@ -150,6 +150,10 @@ static struct tty_ldisc *tty_ldisc_get(struct tty_struct *tty, int disc)
 	 */
 	ldops = get_ldops(disc);
 	if (IS_ERR(ldops)) {
+		/*
+		 * Always request tty-ldisc module regardless of user's
+		 * CAP_SYS_MODULE if autoload is enabled.
+		 */
 		if (!capable(CAP_SYS_MODULE) && !tty_ldisc_autoload)
 			return ERR_PTR(-EPERM);
 		request_module("tty-ldisc-%d", disc);
-- 
The Qualcomm Innovation Center