This is a note to let you know that I've just added the patch titled
serial: core: set missing supported flag for RX during TX GPIO
to the 6.7-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
serial-core-set-missing-supported-flag-for-rx-during-tx-gpio.patch
and it can be found in the queue-6.7 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 1a33e33ca0e80d485458410f149265cdc0178cfa Mon Sep 17 00:00:00 2001
From: Lino Sanfilippo <l.sanfilippo@xxxxxxxxxx>
Date: Wed, 3 Jan 2024 07:18:13 +0100
Subject: serial: core: set missing supported flag for RX during TX GPIO
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From: Lino Sanfilippo <l.sanfilippo@xxxxxxxxxx>
commit 1a33e33ca0e80d485458410f149265cdc0178cfa upstream.
If the RS485 feature RX-during-TX is supported by means of a GPIO set the
according supported flag. Otherwise setting this feature from userspace may
not be possible, since in uart_sanitize_serial_rs485() the passed RS485
configuration is matched against the supported features and unsupported
settings are thereby removed and thus take no effect.
Cc: <stable@xxxxxxxxxxxxxxx>
Fixes: 163f080eb717 ("serial: core: Add option to output RS485 RX_DURING_TX state via GPIO")
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@xxxxxxxxxxxxxxx>
Signed-off-by: Lino Sanfilippo <l.sanfilippo@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20240103061818.564-3-l.sanfilippo@xxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/tty/serial/serial_core.c | 2 ++
1 file changed, 2 insertions(+)
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -3650,6 +3650,8 @@ int uart_get_rs485_mode(struct uart_port
if (IS_ERR(desc))
return dev_err_probe(dev, PTR_ERR(desc), "Cannot get rs485-rx-during-tx-gpios\n");
port->rs485_rx_during_tx_gpio = desc;
+ if (port->rs485_rx_during_tx_gpio)
+ port->rs485_supported.flags |= SER_RS485_RX_DURING_TX;
return 0;
}
Patches currently in stable-queue which might be from l.sanfilippo@xxxxxxxxxx are
queue-6.7/serial-omap-do-not-override-settings-for-rs485-support.patch
queue-6.7/serial-core-imx-do-not-set-rs485-enabled-if-it-is-not-supported.patch
queue-6.7/serial-8250_exar-set-missing-rs485_supported-flag.patch
queue-6.7/serial-do-not-hold-the-port-lock-when-setting-rx-during-tx-gpio.patch
queue-6.7/serial-core-set-missing-supported-flag-for-rx-during-tx-gpio.patch
queue-6.7/serial-core-fix-sanitizing-check-for-rts-settings.patch
queue-6.7/serial-core-make-sure-rs485-cannot-be-enabled-when-it-is-not-supported.patch
