linux-kernel - Re: [PATCH] shdma: add R-Car Audio DMAC peri peri driver

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Date:	Fri, 24 Jan 2014 09:33:49 +0100
From:	Geert Uytterhoeven <geert@...ux-m68k.org>
To:	Kuninori Morimoto <kuninori.morimoto.gx@...il.com>
Cc:	Vinod Koul <vinod.koul@...el.com>,
	Morimoto <kuninori.morimoto.gx@...esas.com>,
	Linux-SH <linux-sh@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] shdma: add R-Car Audio DMAC peri peri driver

Hi Morimoto-san,

On Fri, Jan 24, 2014 at 9:18 AM, Kuninori Morimoto
<kuninori.morimoto.gx@...il.com> wrote:
>> > +       if (slave_id >= AUDMAPP_SLAVE_NUMBER)
>>
>> So slave_id should be unsigned int, too, and AUDMAPP_SLAVE_NUMBER
>> too ("29U").
>
> Hmm...
> This driver is called from shdma-base.c.
> And shdmac.c/sudmac.c/rcar-hpbdmac.c are same style.
>
>  1) this "slave_id" came from shdma_ops::set_slave
>     and, it is using "int"
>  2) above drivers have same xxx_find_slave(),
>     they are using "int".
>     (this driver is based on that)
>
> What should I do ?

OK, then you should keep using int, and change the test to:

    if (slave_id < 0 || slave_id >= AUDMAPP_SLAVE_NUMBER)

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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