linux-kernel - Re: [PATCH AUTOSEL 4.4 42/64] serial: uartps: Wait for tx

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Date:   Mon, 28 Sep 2020 18:00:25 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     Naresh Kamboju <naresh.kamboju@...aro.org>
Cc:     open list <linux-kernel@...r.kernel.org>,
        linux- stable <stable@...r.kernel.org>,
        Raviteja Narayanam <raviteja.narayanam@...inx.com>,
        Shubhrajyoti Datta <shubhrajyoti.datta@...inx.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-serial@...r.kernel.org,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH AUTOSEL 4.4 42/64] serial: uartps: Wait for tx_empty in
 console setup

On Tue, Sep 29, 2020 at 01:46:59AM +0530, Naresh Kamboju wrote:
>On Fri, 18 Sep 2020 at 07:51, Sasha Levin <sashal@...nel.org> wrote:
>>
>> From: Raviteja Narayanam <raviteja.narayanam@...inx.com>
>>
>> [ Upstream commit 42e11948ddf68b9f799cad8c0ddeab0a39da33e8 ]
>>
>> On some platforms, the log is corrupted while console is being
>> registered. It is observed that when set_termios is called, there
>> are still some bytes in the FIFO to be transmitted.
>>
>> So, wait for tx_empty inside cdns_uart_console_setup before calling
>> set_termios.
>>
>> Signed-off-by: Raviteja Narayanam <raviteja.narayanam@...inx.com>
>> Reviewed-by: Shubhrajyoti Datta <shubhrajyoti.datta@...inx.com>
>> Link: https://lore.kernel.org/r/1586413563-29125-2-git-send-email-raviteja.narayanam@xilinx.com
>> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
>> Signed-off-by: Sasha Levin <sashal@...nel.org>
>
>stable rc branch 4.4 arm64 build broken.
>
>../drivers/tty/serial/xilinx_uartps.c: In function ‘cdns_uart_console_setup’:
>../drivers/tty/serial/xilinx_uartps.c:1170:40: error: ‘TX_TIMEOUT’
>undeclared (first use in this function)
> 1170 |  time_out = jiffies + usecs_to_jiffies(TX_TIMEOUT);
>                                                                      ^~~~~~~~~~
>Reported-by: Naresh Kamboju <naresh.kamboju@...aro.org>

Dropped, thanks!

-- 
Thanks,
Sasha