[PATCH v3] serial: sifive: lock port in startup()/shutdown() callbacks

[Ryo Takakura]

On Tue, 15 Apr 2025 09:48:06 +0206, John Ogness wrote:
>On 2025-04-12, Ryo Takakura <ryotkkr98 at gmail.com> wrote:
>> startup()/shutdown() callbacks access SIFIVE_SERIAL_IE_OFFS.
>> The register is also accessed from write() callback.
>>
>> If console were printing and startup()/shutdown() callback
>> gets called, its access to the register could be overwritten.
>>
>> Add port->lock to startup()/shutdown() callbacks to make sure
>> their access to SIFIVE_SERIAL_IE_OFFS is synchronized against
>> write() callback.
>>
>> Fixes: 45c054d0815b ("tty: serial: add driver for the SiFive UART")
>> Signed-off-by: Ryo Takakura <ryotkkr98 at gmail.com>
>> Reviewed-by: Petr Mladek <pmladek at suse.com>
>
>Reviewed-by: John Ogness <john.ogness at linutronix.de>

I'll add for v4, Thank you John!

Sincerely,
Ryo Takakura