Re: [PATCH printk v3 37/40] tty: serial: kgdboc: synchronize tty_find_polling_driver() and register_console()

[Petr Mladek]

On Mon 2022-11-07 15:22:35, John Ogness wrote:
> Calling tty_find_polling_driver() can lead to uart_set_options() being
> called (via the poll_init() callback of tty_operations) to configure the
> uart. But uart_set_options() can also be called by register_console()
> (via the setup() callback of console).
> 
> Take the console_list_lock to synchronize against register_console() and
> also use it for console list traversal. This also ensures the console list
> cannot change until the polling console has been chosen.
> 
> Signed-off-by: John Ogness <john.ogness@xxxxxxxxxxxxx>

Huh, this is a maze of related calls. At least for me. But the change
seems to be correct.

Reviewed-by: Petr Mladek <pmladek@xxxxxxxx>

Best Regards,
Petr