linux-kernel - Re: [PATCH] irq/irq_domain: Quit ignoring error returns from irq_alloc_desc

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Date:	Fri, 06 Apr 2012 16:56:07 -0700
From:	Grant Likely <grant.likely@...retlab.ca>
To:	David Daney <ddaney.cavm@...il.com>,
	Rob Herring <robherring2@...il.com>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Thomas Gleixner <tglx@...utronix.de>
Cc:	David Daney <ddaney.cavm@...il.com>,
	devicetree-discuss@...ts.ozlabs.org, linux-mips@...ux-mips.org,
	linux-kernel@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [PATCH] irq/irq_domain: Quit ignoring error returns from irq_alloc_desc_from().

On Fri, 06 Apr 2012 09:37:49 -0700, David Daney <ddaney.cavm@...il.com> wrote:
> On 04/05/2012 08:37 PM, Rob Herring wrote:
> > On 04/05/2012 06:52 PM, David Daney wrote:
> >> From: David Daney<david.daney@...ium.com>
> >> @@ -380,14 +381,14 @@ unsigned int irq_create_mapping(struct irq_domain *domain,
> >>   	hint = hwirq % irq_virq_count;
> >>   	if (hint == 0)
> >>   		hint++;
> >> -	virq = irq_alloc_desc_from(hint, 0);
> >
> > You are not looking at mainline. hint was removed in later versions, and
> > the referenced commit ids don't exist.
> 
> Please look at Linus' tree before making incorrect statements about 
> whether or not code exists on the 'mainline'

Rob is indeed mistaken here, but please let's keep things civil.  I
did write the patches to remove the hint, but I avoided merging them
because I think they are risky.  I wanted to get the core irq_domain
changes in first.  The removal of hint will be applied during the next
merge window.

I will take your bug fix and get it pushed up to Linus soon.

g.
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