linux-kernel - Re: [PATCH v2 0/3] Handle UART without interrupt on TEMT using em485

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Message-ID: <YB1UEHEPVQCAjsMO@smile.fi.intel.com>
Date:   Fri, 5 Feb 2021 16:20:00 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Eric Tremblay <etremblay@...tech-controls.com>
Cc:     gregkh@...uxfoundation.org, jslaby@...e.com,
        matwey.kornilov@...il.com, giulio.benetti@...ronovasrl.com,
        lukas@...ner.de, linux-serial@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        christoph.muellner@...obroma-systems.com, heiko@...ech.de,
        heiko.stuebner@...obroma-systems.com
Subject: Re: [PATCH v2 0/3] Handle UART without interrupt on TEMT using em485

On Thu, Feb 04, 2021 at 11:11:55AM -0500, Eric Tremblay wrote:
> Thanks everyone for the comments. I apply most of the comments on version 1
> but there is still a pending point with the Jiri comment about the safety of:
> struct tty_struct *tty = p->port.state->port.tty;
> I thought about adding a check with tty_port_initialized() before accessing
> the pointer, but I saw some other places where that same pointer is accessed
> without further protection, at least from what I see.

Thanks for the update. Unfortunately I'm a bit busy with other prioritized
stuff, but I will review this next week.

> Changes from v1 to v2:
> - Use UART_CAP_NOTEMT instead of UART_CAP_TEMT
> - Use some predefined macro to reduce magicness
> - Reset active_timer in temt timer handler
> - add uart_get_byte_size
> - set UART_CAP_NOTEMT in uart_config for PORT_16550A_FSL64
> - Improve commit messages
> - Improve grammar and spelling
> - Add Giulio and Heiko SoB to reflect previous work
> 
> Eric Tremblay (3):
>   serial: 8250: Handle UART without interrupt on TEMT using em485
>   serial: 8250: Add UART_CAP_NOTEMT on PORT_16550A_FSL64
>   serial: 8250: add compatible for fsl,16550-FIFO64
> 
>  drivers/tty/serial/8250/8250.h      |  1 +
>  drivers/tty/serial/8250/8250_of.c   |  2 +
>  drivers/tty/serial/8250/8250_port.c | 68 ++++++++++++++++++++++++++++-
>  drivers/tty/serial/serial_core.c    | 29 ++++++++----
>  include/linux/serial_8250.h         |  2 +
>  include/linux/serial_core.h         |  2 +
>  6 files changed, 94 insertions(+), 10 deletions(-)
> 
> -- 
> 2.17.1
> 

-- 
With Best Regards,
Andy Shevchenko