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Message-ID: <20131204140951.GA29200@e106331-lin.cambridge.arm.com>
Date: Wed, 4 Dec 2013 14:09:51 +0000
From: Mark Rutland <mark.rutland@....com>
To: Alex Elder <alex.elder@...aro.org>
Cc: Christian Daudt <bcm@...thebug.org>,
Ian Campbell <ijc+devicetree@...lion.org.uk>,
Pawel Moll <Pawel.Moll@....com>,
"rob.herring@...xeda.com" <rob.herring@...xeda.com>,
Rob Landley <rob@...dley.net>,
Russell King <linux@....linux.org.uk>,
Stephen Warren <swarren@...dotorg.org>,
Mike Turquette <mturquette@...aro.org>,
"bcm-kernel-feedback-list@...adcom.com"
<bcm-kernel-feedback-list@...adcom.com>,
"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
"linux-arm-kernel@...ts.infradead.org"
<linux-arm-kernel@...ts.infradead.org>,
"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/3] clk: bcm281xx: add initial clock framework support
On Wed, Dec 04, 2013 at 01:57:39PM +0000, Alex Elder wrote:
> On 12/04/2013 07:06 AM, Alex Elder wrote:
> >>> + name_size = strlen(node->name) + 1;
> >>> >> + ccu = kzalloc(sizeof(*ccu) + name_size, GFP_KERNEL);
> >>> >> + if (!ccu) {
> >>> >> + pr_err("%s: unable to map allocate CCU struct for %s\n",
> >>> >> + __func__, node->name);
> >>> >> + return;
> >>> >> + }
> >>> >> + memcpy((char *)ccu->name, node->name, name_size);
> >> >
> >> > You could simplify this with kstrdup.
> > You are correct, and I will make that change. I think at
> > one point I needed the length but that doesn't appear to
> > be the case here.
>
> On second thought, no, you may have missed what was happening here.
> I was avoiding two kmallocs() by setting aside space at the end
> of the structure to hold its name. It may seem silly, but this
> avoids a possible (well, conceivable) failure case.
Yes, I'd misunderstood. Sorry about that.
>
> However, based on your earlier question about "what about freeing
> ccu->name?" I am going to use kstrdup() here. I'd rather the code
> put you at ease than look weird just to avoid an unlikely failure.
I'm happy either way.
Mark.
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