linux-kernel - [PATCH] ata: Don't use NO_IRQ in pata_of

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Date:	Thu, 10 Nov 2011 20:28:59 +0400
From:	Anton Vorontsov <cbouatmailru@...il.com>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	Ingo Molnar <mingo@...e.hu>, Jeff Garzik <jgarzik@...hat.com>,
	Grant Likely <grant.likely@...retlab.ca>,
	Randy Dunlap <rdunlap@...otime.net>,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	linux-next@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
	linux-ide@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	devicetree-discuss@...ts.ozlabs.org
Subject: [PATCH] ata: Don't use NO_IRQ in pata_of_platform driver

Drivers should not use NO_IRQ; moreover, some architectures don't
have it nowadays. '0' is the 'no irq' case.

Signed-off-by: Anton Vorontsov <cbouatmailru@...il.com>
Acked-by: Alan Cox <alan@...ux.intel.com>
---

On Thu, Nov 10, 2011 at 03:38:16PM +0000, Alan Cox wrote:
> On Thu, 10 Nov 2011 19:26:06 +0400
> Anton Vorontsov <cbouatmailru@...il.com> wrote:
> 
> > Drivers should not use NO_IRQ; moreover, some architectures don't
> > have it nowadays. '0' is the 'no irq' case.
> > 
> > Signed-off-by: Anton Vorontsov <cbouatmailru@...il.com>
> 
> Acked-by: Alan Cox <alan@...ux.intel.com>

In case if we don't want a "band-aid fix" for 3.2, here is the patch
that just does the proper fix (w/ a risk to break minor architectures).

 drivers/ata/pata_of_platform.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/ata/pata_of_platform.c b/drivers/ata/pata_of_platform.c
index a72ab0d..2a472c5 100644
--- a/drivers/ata/pata_of_platform.c
+++ b/drivers/ata/pata_of_platform.c
@@ -52,7 +52,7 @@ static int __devinit pata_of_platform_probe(struct platform_device *ofdev)
 	}
 
 	ret = of_irq_to_resource(dn, 0, &irq_res);
-	if (ret == NO_IRQ)
+	if (!ret)
 		irq_res.start = irq_res.end = 0;
 	else
 		irq_res.flags = 0;
-- 
1.7.5.3

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