linux-kernel - Re: [RFC] [PATCH] mfd: Fetch cell pointer from platform_device->mfd

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Message-ID: <20110408225928.GA28190@suse.de>
Date:	Fri, 8 Apr 2011 15:59:28 -0700
From:	Greg KH <gregkh@...e.de>
To:	Samuel Ortiz <sameo@...ux.intel.com>
Cc:	Andres Salomon <dilinger@...ued.net>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Grant Likely <grant.likely@...retlab.ca>
Subject: Re: [RFC] [PATCH] mfd: Fetch cell pointer from
 platform_device->mfd_cell

On Sat, Apr 09, 2011 at 12:54:52AM +0200, Samuel Ortiz wrote:
> Hi Andres,
> 
> On Thu, Apr 07, 2011 at 07:38:55PM -0700, Andres Salomon wrote:
> > > diff --git a/drivers/base/platform.c b/drivers/base/platform.c
> > > index f051cff..6c3a2bd 100644
> > > --- a/drivers/base/platform.c
> > > +++ b/drivers/base/platform.c
> > > @@ -149,6 +149,7 @@ static void platform_device_release(struct device
> > > *dev) 
> > >  	of_device_node_put(&pa->pdev.dev);
> > >  	kfree(pa->pdev.dev.platform_data);
> > > +	kfree(pa->pdev.mfd_cell);
> > 
> > Hm, given that most platform devices won't be mfd devices (and thus
> > mfd_cell will be NULL), is it better to rely on kfree's
> > unlikely(ZERO_OR_NULL_PTR(...)), or have this be "if
> > (pa->pdev.mfd_cell) kfree(pa->pdev.mfd_cell);"?
> I'd say the former (obviously), unless Greg wants it to be otherwise.

Yes, as the patch was originally written is fine with me.

thanks,

greg k-h
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