Re: [PATCH AUTOSEL 4.4 42/64] serial: uartps: Wait for tx_empty in console setup

Sasha Levin
2020-09-28T23:55:36Z

On Tue, Sep 29, 2020 at 01:46:59AM +0530, Naresh Kamboju wrote:
>On Fri, 18 Sep 2020 at 07:51, Sasha Levin <sashal@kernel.org> wrote:
>>
>> From: Raviteja Narayanam <raviteja.narayanam@xilinx.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@xilinx.com>
>> Reviewed-by: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com>
>> Link: https://lore.kernel.org/r/1586413563-29125-2-git-send-email-raviteja.narayanam@xilinx.com
>> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
>> Signed-off-by: Sasha Levin <sashal@kernel.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@linaro.org>

Dropped, thanks!

--
Thanks,
Sasha