linux-kernel - Re: [PATCH] serial: 8250: 8250_core: Use dev_name() during request

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Message-ID: <CAHp75Vc0Ap53s=6SU2o5QjgdaBDWKC24bym7HUt6jQ69HrpdCg@mail.gmail.com>
Date:   Tue, 14 Mar 2017 17:59:01 +0200
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Vignesh R <vigneshr@...com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jslaby@...e.com>,
        "linux-serial@...r.kernel.org" <linux-serial@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        linux-arm Mailing List <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH] serial: 8250: 8250_core: Use dev_name() during request_irq()

On Tue, Mar 14, 2017 at 3:44 PM, Vignesh R <vigneshr@...com> wrote:
> On Monday 13 March 2017 01:35 AM, Andy Shevchenko wrote:
>> On Wed, Mar 8, 2017 at 2:19 PM, Vignesh R <vigneshr@...com> wrote:
>>> Passing "serial" as name during request_irq() results in all serial port
>>> irqs have same name. This does not help much to easily identify which
>>> irq belongs to which serial port instance. Therefore pass dev_name()
>>> during request_irq() so that better identifiable name is listed for
>>> serial ports in cat /proc/interrupts output.
>>>
>>> Output of cat /proc/interrupts
>>> Before this patch:
>>>  26:        689          0     GICv2 309 Edge      serial
>>> After this patch:
>>>  26:        696          0     GICv2 309 Edge      2530c00.serial

>  But, this change is making interrupt name more descriptive

It doesn't in PCI case, it makes it worse.

(The world is not DT-centric)

>> Besides that imagine what would be the name of PCI device here.
>> I would suggest adding ID if you need one in a form like
>> "serial%d", where ID may or may not be supplied by the actual 8250 drivers.
>>
>
> Are you suggesting to use serial_index() as ID?

Yes.

-- 
With Best Regards,
Andy Shevchenko