netdev - Re: [PATCH 2/2] net: ethernet: renesas: sh_eth: don't open code of_device_get_match

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Date:	Wed, 2 Mar 2016 07:46:24 +0100
From:	Wolfram Sang <wsa@...-dreams.de>
To:	Simon Horman <horms@...ge.net.au>
Cc:	linux-renesas-soc@...r.kernel.org,
	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>,
	netdev@...r.kernel.org
Subject: Re: [PATCH 2/2] net: ethernet: renesas: sh_eth: don't open code
 of_device_get_match_data()

On Wed, Mar 02, 2016 at 10:21:34AM +0900, Simon Horman wrote:
> On Tue, Mar 01, 2016 at 05:37:59PM +0100, Wolfram Sang wrote:
> > From: Wolfram Sang <wsa+renesas@...g-engineering.com>
> > 
> > This change will also make Coverity happy by avoiding a theoretical NULL
> > pointer dereference; yet another reason is to use the above helper function
> > to tighten the code and make it more readable.
> > 
> > Signed-off-by: Wolfram Sang <wsa+renesas@...g-engineering.com>
> > ---
> > 
> > Tested on a Lager board.
> > 
> >  drivers/net/ethernet/renesas/sh_eth.c | 10 +++-------
> >  1 file changed, 3 insertions(+), 7 deletions(-)
> > 
> > diff --git a/drivers/net/ethernet/renesas/sh_eth.c b/drivers/net/ethernet/renesas/sh_eth.c
> > index 0a150b2289146f..8b6c07fe3d407d 100644
> > --- a/drivers/net/ethernet/renesas/sh_eth.c
> > +++ b/drivers/net/ethernet/renesas/sh_eth.c
> > @@ -3056,15 +3056,11 @@ static int sh_eth_drv_probe(struct platform_device *pdev)
> >  	mdp->ether_link_active_low = pd->ether_link_active_low;
> >  
> >  	/* set cpu data */
> > -	if (id) {
> > +	if (id)
> >  		mdp->cd = (struct sh_eth_cpu_data *)id->driver_data;
> > -	} else	{
> > -		const struct of_device_id *match;
> > +	else
> > +		mdp->cd = (struct sh_eth_cpu_data *)of_device_get_match_data(&pdev->dev);
> 
> Is the cast needed here? of_device_get_match_data returns void *

The compiler complains about a const mismatch without the cast. To keep
things simple, I decided to leave the cast.


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