linux-kernel - [PATCH 4.9 42/74] tty/serial: atmel: reschedule TX after RX was started

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20190919214808.944700419@linuxfoundation.org>
Date:   Fri, 20 Sep 2019 00:03:55 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Razvan Stefanescu <razvan.stefanescu@...rochip.com>
Subject: [PATCH 4.9 42/74] tty/serial: atmel: reschedule TX after RX was started

From: Razvan Stefanescu <razvan.stefanescu@...rochip.com>

commit d2ace81bf902a9f11d52e59e5d232d2255a0e353 upstream.

When half-duplex RS485 communication is used, after RX is started, TX
tasklet still needs to be  scheduled tasklet. This avoids console freezing
when more data is to be transmitted, if the serial communication is not
closed.

Fixes: 69646d7a3689 ("tty/serial: atmel: RS485 HD w/DMA: enable RX after TX is stopped")
Signed-off-by: Razvan Stefanescu <razvan.stefanescu@...rochip.com>
Cc: stable <stable@...r.kernel.org>
Link: https://lore.kernel.org/r/20190813074025.16218-1-razvan.stefanescu@microchip.com
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/tty/serial/atmel_serial.c |    1 -
 1 file changed, 1 deletion(-)

--- a/drivers/tty/serial/atmel_serial.c
+++ b/drivers/tty/serial/atmel_serial.c
@@ -1279,7 +1279,6 @@ atmel_handle_transmit(struct uart_port *
 
 			atmel_port->hd_start_rx = false;
 			atmel_start_rx(port);
-			return;
 		}
 
 		atmel_tasklet_schedule(atmel_port, &atmel_port->tasklet_tx);