linux-kernel - Re: [PATCH net-next 2/2] drivers/net: Remove casts of void *

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Date:	Tue, 14 Jun 2011 16:02:30 +0200
From:	Geert Uytterhoeven <geert@...ux-m68k.org>
To:	Joe Perches <joe@...ches.com>
Cc:	netdev@...r.kernel.org,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	Jay Cliburn <jcliburn@...il.com>,
	Chris Snook <chris.snook@...il.com>,
	Jie Yang <jie.yang@...eros.com>,
	Sathya Perla <sathya.perla@...lex.com>,
	Subbu Seetharaman <subbu.seetharaman@...lex.com>,
	Ajit Khaparde <ajit.khaparde@...lex.com>,
	Rasesh Mody <rmody@...cade.com>,
	Debashis Dutt <ddutt@...cade.com>,
	Sjur Braendeland <sjur.brandeland@...ricsson.com>,
	Divy Le Ray <divy@...lsio.com>,
	Breno Leitao <leitao@...ux.vnet.ibm.com>,
	Amit Kumar Salecha <amit.salecha@...gic.com>,
	Ron Mercer <ron.mercer@...gic.com>, linux-driver@...gic.com,
	Anirban Chakraborty <anirban.chakraborty@...gic.com>,
	Jon Mason <jdmason@...zu.us>,
	Solarflare linux maintainers <linux-net-drivers@...arflare.com>,
	Steve Hodgson <shodgson@...arflare.com>,
	Ben Hutchings <bhutchings@...arflare.com>,
	Daniele Venzano <venza@...wnhat.org>,
	David Dillow <dave@...dillows.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next 2/2] drivers/net: Remove casts of void *

Hi Joe,

On Tue, Jun 14, 2011 at 16:00, Joe Perches <joe@...ches.com> wrote:
> On Tue, 2011-06-14 at 11:21 +0200, Geert Uytterhoeven wrote:
>> On Tue, Jun 14, 2011 at 06:02, Joe Perches <joe@...ches.com> wrote:
>> > Unnecessary casts of void * clutter the code.
>> > --- a/drivers/net/a2065.c
>> > +++ b/drivers/net/a2065.c
>> > @@ -426,7 +426,7 @@ static irqreturn_t lance_interrupt (int irq, void *dev_id)
>> >        volatile struct lance_regs *ll;
>> >        int csr0;
>> >
>> > -       dev = (struct net_device *) dev_id;
>> > +       dev = dev_id;
>>
>> I think it would look better if you merge this line with the line that
>> defines "dev".
>
> I think so too, but I also think it should look like below
> and that's something better done in a separate pass, don't
> you think?
>
> diff --git a/drivers/net/a2065.c b/drivers/net/a2065.c
> index deaa8bc..25ea98a 100644
> --- a/drivers/net/a2065.c
> +++ b/drivers/net/a2065.c
> @@ -421,16 +421,11 @@ static int lance_tx (struct net_device *dev)
>
>  static irqreturn_t lance_interrupt (int irq, void *dev_id)
>  {
> -       struct net_device *dev;
> -       struct lance_private *lp;
> -       volatile struct lance_regs *ll;
> +       struct net_device *dev = dev_id;
> +       struct lance_private *lp = netdev_priv(dev);
> +       volatile struct lance_regs *ll = lp->ll;
>        int csr0;
>
> -       dev = (struct net_device *) dev_id;
> -
> -       lp = netdev_priv(dev);
> -       ll = lp->ll;
> -
>        ll->rap = LE_CSR0;              /* LANCE Controller Status */
>        csr0 = ll->rdp;

Definitely better!

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds
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