linux-kernel - Re: [PATCH] tty: serial: fsl_lpuart: Fix lpuart_flush

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Date:   Fri, 4 Oct 2019 20:12:56 -0400
From:   Vivien Didelot <vivien.didelot@...il.com>
To:     Andrey Smirnov <andrew.smirnov@...il.com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Andrey Smirnov <andrew.smirnov@...il.com>,
        Stefan Agner <stefan@...er.ch>, Andrew Lunn <andrew@...n.ch>,
        Chris Healy <cphealy@...il.com>,
        Cory Tusar <cory.tusar@....aero>,
        Lucas Stach <l.stach@...gutronix.de>,
        Jiri Slaby <jslaby@...e.com>, linux-imx@....com,
        linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] tty: serial: fsl_lpuart: Fix lpuart_flush_buffer()

Hi Andrey,

On Fri,  4 Oct 2019 14:55:37 -0700, Andrey Smirnov <andrew.smirnov@...il.com> wrote:
> Fix incorrect read-modify-write sequence in lpuart_flush_buffer() that
> was reading from UARTPFIFO and writing to UARTCFIFO instead of
> operating solely on the latter.
> 
> Fixes: 9bc19af9dacb ("tty: serial: fsl_lpuart: Flush HW FIFOs in .flush_buffer")
> Signed-off-by: Andrey Smirnov <andrew.smirnov@...il.com>

This fixes the TTY on my ZII Devel Boards Rev B and C:

Reported-by: Vivien Didelot <vivien.didelot@...il.com>
Tested-by: Vivien Didelot <vivien.didelot@...il.com>


Thank you!

	Vivien