Re: [PATCH 2/2] uio: add an of_genirq driver

From: Wolfram Sang <w.sang-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
To: "Hans J. Koch" <hjk-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org>
Cc: linuxppc-dev-mnsaURCQ41sdnm+yROfE0A@public.gmane.org,
	devicetree-discuss-mnsaURCQ41sdnm+yROfE0A@public.gmane.org,
	Magnus Damm <magnus.damm-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	Greg KH <gregkh-l3A5Bk7waGM@public.gmane.org>
Subject: Re: [PATCH 2/2] uio: add an of_genirq driver
Date: Sun, 14 Jun 2009 19:14:06 +0200	[thread overview]
Message-ID: <20090614171406.GA1010@pengutronix.de> (raw)
In-Reply-To: <20090614122136.GD3639@local>

[-- Attachment #1.1: Type: text/plain, Size: 1123 bytes --]

Hello Hans,

> > +	uioinfo->irq = irq_of_parse_and_map(op->node, 0);
> > +	if (!uioinfo->irq)
> > +		uioinfo->irq = UIO_IRQ_NONE;
> 
> Please don't do this. It's inconsistent if all other UIO drivers require
> people to use UIO_IRQ_NONE and you also allow zero. UIO_IRQ_NONE was
> introduced because 0 may be a legal interrupt number on some platforms.

Yes, well, the '0' vs. 'NO_IRQ' thing is still not fully sorted out AFAIK. But
you are possibly right here, as long as irq_of_parse_and_map does return
NO_IRQ, I should explicitly check for it, like this:

	if (uioinfo->irq == NO_IRQ)
		uioinfo->irq = UIO_IRQ_NONE;

> > +/* Match table for of_platform binding */
> > +static const struct of_device_id __devinitconst uio_of_genirq_match[] = {
> 
> checkpatch.pl complains about that. Please check.

Did that, it is a false positive. See here:

http://lkml.indiana.edu/hypermail/linux/kernel/0906.1/02780.html

Regards,

   Wolfram

-- 
Pengutronix e.K.                           | Wolfram Sang                |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |

[-- Attachment #1.2: Digital signature --]
[-- Type: application/pgp-signature, Size: 197 bytes --]

[-- Attachment #2: Type: text/plain, Size: 194 bytes --]

_______________________________________________
devicetree-discuss mailing list
devicetree-discuss-mnsaURCQ41sdnm+yROfE0A@public.gmane.org
https://ozlabs.org/mailman/listinfo/devicetree-discuss