linux-kernel - Re: [PATCH] iio: sx9500: Add missing init in sx9500_buffer

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Date:	Sun, 05 Jul 2015 14:19:11 +0100
From:	Jonathan Cameron <jic23@...nel.org>
To:	Vlad Dogaru <vlad.dogaru@...el.com>,
	Geert Uytterhoeven <geert@...ux-m68k.org>
CC:	linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] iio: sx9500: Add missing init in sx9500_buffer_pre{en,dis}able()

On 29/06/15 08:36, Vlad Dogaru wrote:
> On Mon, Jun 29, 2015 at 09:14:33AM +0200, Geert Uytterhoeven wrote:
>> drivers/iio/proximity/sx9500.c: In function ‘sx9500_buffer_preenable’:
>> drivers/iio/proximity/sx9500.c:682: warning: ‘ret’ may be used uninitialized in this function
>> drivers/iio/proximity/sx9500.c: In function ‘sx9500_buffer_predisable’:
>> drivers/iio/proximity/sx9500.c:706: warning: ‘ret’ may be used uninitialized in this function
>>
>> If active_scan_mask is empty, it will loop once more over all channels,
>> doing nothing.
>>
>> Signed-off-by: Geert Uytterhoeven <geert@...ux-m68k.org>
> 
> Reviewed-by: Vlad Dogaru <vlad.dogaru@...el.com>
> 
> I wonder if those functions are ever called with an empty scan mask.
I'm feeling to lazy to check ;)
> But the fix is correct nonetheless.  Nice catch :)
Applied to the fixes-for-4.2 branch of iio.git

Thanks,

Jonathan
> 
>> ---
>>  drivers/iio/proximity/sx9500.c | 4 ++--
>>  1 file changed, 2 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/iio/proximity/sx9500.c b/drivers/iio/proximity/sx9500.c
>> index 2042e375f8351de6..7624cfa2422d4e41 100644
>> --- a/drivers/iio/proximity/sx9500.c
>> +++ b/drivers/iio/proximity/sx9500.c
>> @@ -679,7 +679,7 @@ out:
>>  static int sx9500_buffer_preenable(struct iio_dev *indio_dev)
>>  {
>>  	struct sx9500_data *data = iio_priv(indio_dev);
>> -	int ret, i;
>> +	int ret = 0, i;
>>  
>>  	mutex_lock(&data->mutex);
>>  
>> @@ -703,7 +703,7 @@ static int sx9500_buffer_preenable(struct iio_dev *indio_dev)
>>  static int sx9500_buffer_predisable(struct iio_dev *indio_dev)
>>  {
>>  	struct sx9500_data *data = iio_priv(indio_dev);
>> -	int ret, i;
>> +	int ret = 0, i;
>>  
>>  	iio_triggered_buffer_predisable(indio_dev);
>>  
>> -- 
>> 1.9.1
>>
>> --
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