linux-kernel - Re: [PATCH 2/8] serial: core, 8250: set RS485 termination gpio in serial core

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Message-ID: <YrNMMQUYdgDz45Jc@smile.fi.intel.com>
Date:   Wed, 22 Jun 2022 20:06:57 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Lino Sanfilippo <LinoSanfilippo@....de>
Cc:     gregkh@...uxfoundation.org, jirislaby@...nel.org,
        ilpo.jarvinen@...ux.intel.com, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, vz@...ia.com,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org,
        lukas@...ner.de, p.rosenberger@...bus.com,
        Lino Sanfilippo <l.sanfilippo@...bus.com>
Subject: Re: [PATCH 2/8] serial: core, 8250: set RS485 termination gpio in
 serial core

On Wed, Jun 22, 2022 at 05:46:53PM +0200, Lino Sanfilippo wrote:
> From: Lino Sanfilippo <l.sanfilippo@...bus.com>
> 
> In serial8250_em485_config() the termination GPIO is set with the uart_port
> spinlock held. This is an issue if setting the GPIO line can sleep (e.g.
> since the concerning GPIO expander is connected via SPI or I2C).
> 
> Fix this by setting the termination line outside of the uart_port spinlock
> in the serial core.

This doesn't describe that this patch is actually changing GPIO to support
sleep mode. So, it doesn't fix anything. Please rephrase the commit message
accordingly.

> This also makes setting the termination GPIO generic for all uart drivers.

UART

-- 
With Best Regards,
Andy Shevchenko