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mxser: increase buf_overrun if tty_insert_flip_char() fails

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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 <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20211118073125.12283-17-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jiri Slaby 2021-11-18 08:31:22 +01:00 committed by Greg Kroah-Hartman
parent 9dd6f3063a
commit eb68ac0462
1 changed files with 5 additions and 2 deletions
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7
drivers/tty/mxser.c
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@ -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)