linux-kernel - Re: [PATCH] regmap: Fix 'ret' would return an uninitialized value

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Date:	Fri, 15 Nov 2013 14:27:54 +0100
From:	Levente Kurusa <levex@...ux.com>
To:	Geyslan Gregório Bem <geyslan@...il.com>,
	Caizhiyong <caizhiyong@...ilicon.com>
CC:	Mark Brown <broonie@...nel.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Wanglin (Albert)" <albert.wanglin@...ilicon.com>,
	Levente Kurusa <ilevex.linux@...il.com>
Subject: Re: [PATCH] regmap: Fix 'ret' would return an uninitialized value

2013-11-15 14:00 keltezéssel, Geyslan Gregório Bem írta:
> 2013/11/15 Caizhiyong <caizhiyong@...ilicon.com>:
>> From: Cai Zhiyong <caizhiyong@...wei.com>
>> Date: Mon, 11 Nov 2013 19:26:14 +0800
>> Subject: [PATCH] regmap: Fix 'ret' would return an uninitialized value
>>
>> This patch give a warning when calling regmap_register_patch with
>> parameter num_regs <= 0.
>>
>> When the num_regs parameter is zero and krealloc doesn't fail,
>> then the code would return an uninitialized value. However,
>> calling this function with num_regs == 0, would be a waste as it
>> essentially does nothing.
>>
>> Signed-off-by: Cai Zhiyong <caizhiyong@...wei.com>
> Reviewed-by: Geyslan G. Bem <geyslan@...il.com>
> 
> Seems a good approach.
> 

The patch doesn't apply. After manually applying this it
threw a compilation error:

drivers/base/regmap/regmap.c: In function ‘regmap_register_patch’:
drivers/base/regmap/regmap.c:2176:6: error: expected expression before ‘)’ token


Cai,
You have missed the second parameter of WARN_ONCE().
Please append what you'd prefer to have outputten once the condition evaluates to true.

-- 
Regards,
Levente Kurusa
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