linux-kernel - Re: [PATCH] serial: core: Fix serial_base_match() after fixing controller port name

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Message-ID: <ZMrOQifgCZqu3YTh@smile.fi.intel.com>
Date:   Thu, 3 Aug 2023 00:44:34 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Tony Lindgren <tony@...mide.com>,
        Jiri Slaby <jirislaby@...nel.org>, Dhruva Gole <d-gole@...com>,
        Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
        John Ogness <john.ogness@...utronix.de>,
        Johan Hovold <johan@...nel.org>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Vignesh Raghavendra <vigneshr@...com>,
        linux-kernel@...r.kernel.org, linux-serial@...r.kernel.org,
        kernel test robot <oliver.sang@...el.com>
Subject: Re: [PATCH] serial: core: Fix serial_base_match() after fixing
 controller port name

On Wed, Aug 02, 2023 at 03:48:26PM +0200, Greg Kroah-Hartman wrote:
> On Wed, Aug 02, 2023 at 02:48:43PM +0300, Tony Lindgren wrote:
> > While fixing DEVNAME to be more usable, I broke serial_base_match() as
> > the ctrl and port prefix for device seemed unnecessary.
> > 
> > Let's fix the issue by checking against dev->type and drv->name.

...

> > +	    !strncmp(SERIAL_BASE_CTRL_NAME, drv->name, 4))
> 
> maybe:
> 	    !strncmp(SERIAL_BASE_CTRL_NAME, drv->name, strlen(SERIAL_BASE_CTRL_NAME))
> 
> as "4" is a magic number :)

str_has_prefix() hides that.

-- 
With Best Regards,
Andy Shevchenko