[question] De-registration does not remove port

[Saubhik Mukherjee]

On 6/23/21 12:44 PM, Greg KH wrote:
> On Wed, Jun 23, 2021 at 11:42:36AM +0530, Saubhik Mukherjee wrote:
>> In drivers/tty/serial/arc_uart.c, arc_serial_remove always returns 0,
>> instead of calling uart_remove_one_port to remove uart port from serial
>> core. The comment says "This will be never be called". In my understanding,
>> a port added using uart_add_one_port should be removed during
>> de-registration.
>>
>> Is there a reason for this behavior?
> 
> Did you test the code to see if that function will ever be called?

I would like to reformulate the question: Suppose arc_serial_remove is 
never called. Then I would like to know how the driver de-registration 
is organized since the UART port is never removed?