From: Greg KH <gregkh@linuxfoundation.org>
To: Lino Sanfilippo <LinoSanfilippo@gmx.de>
Cc: jirislaby@kernel.org, shawnguo@kernel.org,
s.hauer@pengutronix.de, ilpo.jarvinen@linux.intel.com,
mcoquelin.stm32@gmail.com, alexandre.torgue@foss.st.com,
linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org,
l.sanfilippo@kunbus.com, lukas@wunner.de,
p.rosenberger@kunbus.com
Subject: Re: [PATCH 6/6] serial: imx: do not set RS485 enabled if it is not supported
Date: Fri, 29 Sep 2023 07:51:00 +0200 [thread overview]
Message-ID: <2023092948-canteen-pushy-7f54@gregkh> (raw)
In-Reply-To: <20230928221246.13689-7-LinoSanfilippo@gmx.de>
On Fri, Sep 29, 2023 at 12:12:46AM +0200, Lino Sanfilippo wrote:
> From: Lino Sanfilippo <l.sanfilippo@kunbus.com>
>
> If the imx driver cannot support RS485 it sets the UARTS rs485_supported
> structure to NULL. But it still calls uart_get_rs485_mode() which may set
> the RS485_ENABLED flag.
> The flag however is evaluated by the serial core in uart_configure_port()
> at port startup and thus may lead to an attempt to configure RS485 even if
> it is not supported.
>
> Avoid this by calling uart_get_rs485_mode() only if RS485 is actually
> supported by the driver. Remove also a check for an error condition
> that is not possible any more now.
>
> Signed-off-by: Lino Sanfilippo <l.sanfilippo@kunbus.com>
> ---
> drivers/tty/serial/imx.c | 14 ++++++--------
> 1 file changed, 6 insertions(+), 8 deletions(-)
Why is this patch not marked for stable?
thanks,
greg k-h
next prev parent reply other threads:[~2023-09-29 5:51 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-28 22:12 [PATCH 0/6] Fixes and improvements for RS485 Lino Sanfilippo
2023-09-28 22:12 ` [PATCH 1/6] serial: Do not hold the port lock when setting rx-during-tx GPIO Lino Sanfilippo
2023-09-29 5:50 ` Greg KH
2023-09-29 12:21 ` Lino Sanfilippo
2023-09-28 22:12 ` [PATCH 2/6] serial: amba-pl011: get rid of useless wrapper pl011_get_rs485_mode() Lino Sanfilippo
2023-09-28 22:33 ` Lukas Wunner
2023-09-28 22:12 ` [PATCH 3/6] serial: core: set missing supported flag for RX during TX GPIO Lino Sanfilippo
2023-09-28 22:12 ` [PATCH 4/6] serial: core: fix sanitizing check for RTS settings Lino Sanfilippo
2023-09-28 22:12 ` [PATCH 5/6] serial: core: make sure RS485 is cannot be enabled when it is not supported Lino Sanfilippo
2023-09-29 12:17 ` Hugo Villeneuve
2023-09-29 12:25 ` Lino Sanfilippo
2023-09-28 22:12 ` [PATCH 6/6] serial: imx: do not set RS485 enabled if " Lino Sanfilippo
2023-09-29 5:51 ` Greg KH [this message]
2023-09-29 12:22 ` Lino Sanfilippo
2023-09-29 6:39 ` Uwe Kleine-König
2023-09-29 13:46 ` Lino Sanfilippo
2023-09-29 15:44 ` Uwe Kleine-König
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