Commit ec66b8cf authored by Ilpo Järvinen's avatar Ilpo Järvinen Committed by Greg Kroah-Hartman
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tty: Add function for handling flow control chars 



Move receive path flow control character handling to own function.

No functional changes.

Signed-off-by: default avatarIlpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20220411094859.10894-2-ilpo.jarvinen@linux.intel.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent b0e0bd9d

drivers/tty/n_tty.c

+18 −11
Original line number Diff line number Diff line
@@ -1220,22 +1220,29 @@ n_tty_receive_signal_char(struct tty_struct *tty, int signal, unsigned char c) 
		process_echoes(tty);

}



static void n_tty_receive_char_special(struct tty_struct *tty, unsigned char c)

/* Returns true if c is consumed as flow-control character */

static bool n_tty_receive_char_flow_ctrl(struct tty_struct *tty, unsigned char c)

{

	struct n_tty_data *ldata = tty->disc_data;



	if (I_IXON(tty)) {

	if (c == START_CHAR(tty)) {

		start_tty(tty);

		process_echoes(tty);

			return;

		return true;

	}

	if (c == STOP_CHAR(tty)) {

		stop_tty(tty);

			return;

		return true;

	}



	return false;

}



static void n_tty_receive_char_special(struct tty_struct *tty, unsigned char c)

{

	struct n_tty_data *ldata = tty->disc_data;



	if (I_IXON(tty) && n_tty_receive_char_flow_ctrl(tty, c))

		return;



	if (L_ISIG(tty)) {

		if (c == INTR_CHAR(tty)) {

			n_tty_receive_signal_char(tty, SIGINT, c);