linux-kernel - Re: [PATCH] arm: omap2+: hwmod: fix breakage introduced by d6504acd

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Date:	Mon, 7 Nov 2011 14:51:57 -0800
From:	Tony Lindgren <tony@...mide.com>
To:	Russell King - ARM Linux <linux@....linux.org.uk>
Cc:	Paul Walmsley <paul@...an.com>, Felipe Balbi <balbi@...com>,
	Linux OMAP Mailing List <linux-omap@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Linux ARM Kernel Mailing List 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH] arm: omap2+: hwmod: fix breakage introduced by d6504acd

* Russell King - ARM Linux <linux@....linux.org.uk> [111107 14:06]:
> On Mon, Nov 07, 2011 at 02:29:35PM -0700, Paul Walmsley wrote:
> > On Mon, 7 Nov 2011, Russell King - ARM Linux wrote:
> > 
> > > Again, can never have been tested on OMAP3.
> > > 
> > > Does anyone apart from me bother doing any testing what so ever on OMAP3
> > > platforms?  Am I the only one?
> > 
> > This was fixed by 
> > 
> > http://www.spinics.net/lists/arm-kernel/msg143549.html
> > 
> > which didn't go upstream as part of the v3.2 merge window.
> 
> Ah, that patch.
> 
> Which version of the patch does Tony have?  The one you point at which
> uses IS_ERR_VALUE() and I complained about, or the version that has that
> fixed?

Here's what I got. Looks like the removal of the sr[12]_hwmod
part is no longer needed, so only the r value check part is needed.

From: Paul Walmsley <paul@...an.com>
Date: Thu, 6 Oct 2011 14:39:28 -0600
Subject: [PATCH] ARM: OMAP3: hwmod: fix variant registration and remove SmartReflex from common list

Commit d6504acd2125984c61dce24727dd3842d0144015 ("OMAP2+: hwmod:
remove OMAP_CHIP*") tests the inverse condition of what it should be
testing for the return value from omap_hwmod_register().  This causes
several IP blocks to not be registered on several OMAP3 family devices.

Fixing that bug also unmasked another bug, originally reported by
Chase Maupin <chase.maupin@...com> and then subsequently by Abhilash K
V <abhilash.kv@...com>, which caused SmartReflex IP blocks to be
registered on SoCs that don't support them.

Thanks to Russell King - ARM Linux <linux@....linux.org.uk> for comments
on a previous version of the patch.

Signed-off-by: Paul Walmsley <paul@...an.com>
Cc: Chase Maupin <chase.maupin@...com>
Cc: Abhilash K V <abhilash.kv@...com>
Cc: Russell King - ARM Linux <linux@....linux.org.uk>
Signed-off-by: Tony Lindgren <tony@...mide.com>

--- a/arch/arm/mach-omap2/omap_hwmod_3xxx_data.c
+++ b/arch/arm/mach-omap2/omap_hwmod_3xxx_data.c
@@ -3270,7 +3270,7 @@ int __init omap3xxx_hwmod_init(void)
 
 	/* Register hwmods common to all OMAP3 */
 	r = omap_hwmod_register(omap3xxx_hwmods);
-	if (!r)
+	if (r < 0)
 		return r;
 
 	rev = omap_rev();
@@ -3295,7 +3295,7 @@ int __init omap3xxx_hwmod_init(void)
 	};
 
 	r = omap_hwmod_register(h);
-	if (!r)
+	if (r < 0)
 		return r;
 
 	/*
--
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