linux-kernel - Re: [PATCH 1/6 v2] ARM: Add basic architecture support for VIA/WonderMedia 85xx SoC's

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Date:	Sun, 7 Nov 2010 20:16:21 +0300
From:	Alexey Charkov <alchark@...il.com>
To:	Russell King - ARM Linux <linux@....linux.org.uk>
Cc:	linux-arm-kernel@...ts.infradead.org,
	vt8500-wm8505-linux-kernel@...glegroups.com,
	Eric Miao <eric.y.miao@...il.com>,
	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>,
	Albin Tonnerre <albin.tonnerre@...e-electrons.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/6 v2] ARM: Add basic architecture support for
 VIA/WonderMedia 85xx SoC's

2010/11/7 Russell King - ARM Linux <linux@....linux.org.uk>:
> A couple of other points - sorry, should've been in the last mail.
>
> On Sun, Nov 07, 2010 at 07:28:52PM +0300, Alexey Charkov wrote:
>> diff --git a/arch/arm/mach-vt8500/Kconfig b/arch/arm/mach-vt8500/Kconfig
>> new file mode 100644
>> index 0000000..e0c6268
>> --- /dev/null
>> +++ b/arch/arm/mach-vt8500/Kconfig
>> @@ -0,0 +1,65 @@
>> +if ARCH_VT8500
>> +
>> +config VTWM_VERSION_VT8500
>> +     bool
>> +     default n
>
> n is the default anyway, so specifying this is redundant.
>

Great, I'll drop it then.

>> +void __init bv07_init(void)
>> +{
>> +#ifdef CONFIG_FB_VT8500
>> +     void __iomem *gpio_mux_reg = ioremap(wmt_current_regs->gpio
>> +                                          + 0x200, 4);
>
> ioremap() is generally regarded as a function which can fail, and therefore
> needs its return value checked.  There seems to be multiple instances of
> this through this patch.
>

Is it OK to simply skip the code that uses the relevant pointer if
ioremap fails (possibly issuing an error via printk)? The problem is
that these are void functions, so I can't just return -ENODEV on
failure.
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