linux-kernel - Re: [PATCH v2 1/1] serial: 8250: Turn IER bits on only after irq has been set up

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Message-ID: <YySaixqlQjkMYPUB@smile.fi.intel.com>
Date:   Mon, 19 Sep 2022 16:56:25 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
Cc:     Lennert Buytenhek <buytenh@...tstofly.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jirislaby@...nel.org>,
        Aristeu Sergio Rozanski Filho <aris@...hedrallabs.org>,
        Alex Williamson <alex.williamson@...com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org,
        Lennert Buytenhek <buytenh@...sta.com>
Subject: Re: [PATCH v2 1/1] serial: 8250: Turn IER bits on only after irq has
 been set up

On Fri, Sep 16, 2022 at 06:44:49PM +0300, Andy Shevchenko wrote:
> On Fri, Sep 16, 2022 at 06:36:16PM +0300, Andy Shevchenko wrote:
> > On Fri, Sep 16, 2022 at 04:38:04PM +0300, Ilpo Järvinen wrote:
> 
> Side note:
> 
> $ git grep -n -w setup_irq -- drivers/tty/
> drivers/tty/serial/8250/8250_core.c:382:        .setup_irq      = univ8250_setup_irq,
> drivers/tty/serial/8250/8250_port.c:2341:       retval = up->ops->setup_irq(up);
> 
> which rises a question of whether we need the setup_irq member in the
> respective structure.

And to be confident, the files that include linux/serial_8250.h and have
setup_irq word in them (recursive `git grep`) in entire source tree:

drivers/tty/serial/8250/8250_core.c
drivers/tty/serial/8250/8250_port.c
include/linux/serial_8250.h

-- 
With Best Regards,
Andy Shevchenko