From: Jiri Slaby Date: Thu, 18 Nov 2021 07:31:22 +0000 (+0100) Subject: mxser: increase buf_overrun if tty_insert_flip_char() fails X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=eb68ac0462bffc2ceb63b3a76737d6c9f186e6de;p=linux.git mxser: increase buf_overrun if tty_insert_flip_char() fails mxser doesn't increase port->icount.buf_overrun at all. Do so if overrun happens, so that it can be read from the stats. Signed-off-by: Jiri Slaby Link: https://lore.kernel.org/r/20211118073125.12283-17-jslaby@suse.cz Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/tty/mxser.c b/drivers/tty/mxser.c index 10862d4bb8857..65ea4baee5eb2 100644 --- a/drivers/tty/mxser.c +++ b/drivers/tty/mxser.c @@ -1507,7 +1507,8 @@ static bool mxser_receive_chars_new(struct mxser_port *port, u8 status) while (gdl--) { u8 ch = inb(port->ioaddr + UART_RX); - tty_insert_flip_char(&port->port, ch, 0); + if (!tty_insert_flip_char(&port->port, ch, 0)) + port->icount.buf_overrun++; } return true; @@ -1553,8 +1554,10 @@ static u8 mxser_receive_chars_old(struct tty_struct *tty, port->icount.overrun++; } } - if (!tty_insert_flip_char(&port->port, ch, flag)) + if (!tty_insert_flip_char(&port->port, ch, flag)) { + port->icount.buf_overrun++; break; + } } if (hwid)