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From: Jiri Slaby <jslaby@suse.cz>
To: gregkh@linuxfoundation.org
Cc: linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org,
	Jiri Slaby <jslaby@suse.cz>
Subject: [PATCH 16/19] mxser: increase buf_overrun if tty_insert_flip_char() fails
Date: Thu, 18 Nov 2021 08:31:22 +0100	[thread overview]
Message-ID: <20211118073125.12283-17-jslaby@suse.cz> (raw)
In-Reply-To: <20211118073125.12283-1-jslaby@suse.cz>

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>
---
 drivers/tty/mxser.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/tty/mxser.c b/drivers/tty/mxser.c
index 10862d4bb885..65ea4baee5eb 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)
-- 
2.33.1


  parent reply	other threads:[~2021-11-18  7:32 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-11-18  7:31 [PATCH 00/19] mxser: another round of cleanups and fixes Jiri Slaby
2021-11-18  7:31 ` [PATCH 01/19] mxser: remove wait for sent from mxser_close_port Jiri Slaby
2021-11-18  7:31 ` [PATCH 02/19] mxser: rename mxser_close_port() to mxser_stop_rx() Jiri Slaby
2021-11-18  7:31 ` [PATCH 03/19] mxser: keep only !tty test in ISR Jiri Slaby
2021-11-18  7:31 ` [PATCH 04/19] mxser: move MSR read to mxser_check_modem_status() Jiri Slaby
2021-11-18  7:31 ` [PATCH 05/19] mxser: clean up tx handling in mxser_transmit_chars() Jiri Slaby
2021-11-18  7:31 ` [PATCH 06/19] mxser: remove pointless xmit_buf checks Jiri Slaby
2021-11-18  7:31 ` [PATCH 07/19] mxser: remove tty->driver_data NULL check Jiri Slaby
2021-11-18  7:31 ` [PATCH 08/19] mxser: call stop_rx from mxser_shutdown_port() Jiri Slaby
2021-11-18  7:31 ` [PATCH 09/19] mxser: don't flush buffer from mxser_close() directly Jiri Slaby
2021-11-18  7:31 ` [PATCH 10/19] mxser: use tty_port_close() in mxser_close() Jiri Slaby
2021-11-18  7:31 ` [PATCH 11/19] mxser: extract TX empty check from mxser_wait_until_sent() Jiri Slaby
2021-11-18  7:31 ` [PATCH 12/19] mxser: use msleep_interruptible() in mxser_wait_until_sent() Jiri Slaby
2021-11-18  7:31 ` [PATCH 13/19] mxser: clean up timeout handling " Jiri Slaby
2021-11-18  7:31 ` [PATCH 14/19] mxser: don't throttle manually Jiri Slaby
2021-11-18  7:31 ` [PATCH 15/19] mxser: remove tty parameter from mxser_receive_chars_new() Jiri Slaby
2021-11-18  7:31 ` Jiri Slaby [this message]
2021-11-18  7:31 ` [PATCH 17/19] mxser: add MOXA prefix to some PCI device IDs Jiri Slaby
2021-11-18  7:31 ` [PATCH 18/19] mxser: move ids from pci_ids.h here Jiri Slaby
2021-11-18 20:58   ` Bjorn Helgaas
2021-11-18  7:31 ` [PATCH 19/19] mxser: use PCI_DEVICE_DATA Jiri Slaby

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