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From: walter harms <wharms@bfs.de>
To: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Jonathan Cameron <jic23@kernel.org>,
	Grant Likely <grant.likely@linaro.org>,
	Rob Herring <robh+dt@kernel.org>, Josh Wu <josh.wu@atmel.com>,
	Alexandre Belloni <alexandre.belloni@free-electrons.com>,
	Nicolas Ferre <nicolas.ferre@atmel.com>,
	Maxime Ripard <maxime.ripard@free-electrons.com>,
	Lars-Peter Clausen <lars@metafoo.de>,
	Thomas Meyer <thomas@m3y3r.de>,
	Wei Yongjun <yongjun_wei@trendmicro.com.cn>,
	Sachin Kamat <sachin.kamat@linaro.org>,
	linux-iio@vger.kernel.org, kernel-janitors@vger.kernel.org
Subject: Re: [patch] iio: adc: at91: signedness bug in at91_adc_get_trigger_value_by_name()
Date: Wed, 11 Jun 2014 07:36:49 +0000	[thread overview]
Message-ID: <53980711.5030604@bfs.de> (raw)
In-Reply-To: <20140611065356.GB16443@mwanda>



Am 11.06.2014 08:53, schrieb Dan Carpenter:
> The function returns a u8 so the -ENOMEM is truncated to a positive
> value.  The caller tests for zero returns and treats them as an error
> so I have changed the -ENOMEM to 0.
> 
> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
> 
> diff --git a/drivers/iio/adc/at91_adc.c b/drivers/iio/adc/at91_adc.c
> index 3b5bacd..5ebe33d 100644
> --- a/drivers/iio/adc/at91_adc.c
> +++ b/drivers/iio/adc/at91_adc.c
> @@ -525,7 +525,7 @@ static u8 at91_adc_get_trigger_value_by_name(struct iio_dev *idev,
>  				idev->id,
>  				triggers[i].name);
>  		if (!name)
> -			return -ENOMEM;
> +			return 0;
>  
>  		if (strcmp(trigger_name, name) = 0) {
>  			value = triggers[i].value;


hi Dan,
LXR says there is only 1 caller (and he is checking for ENOMON)
perhaps it is better to change  the return value to int.

re,
 wh

WARNING: multiple messages have this Message-ID (diff)
From: walter harms <wharms@bfs.de>
To: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Jonathan Cameron <jic23@kernel.org>,
	Grant Likely <grant.likely@linaro.org>,
	Rob Herring <robh+dt@kernel.org>, Josh Wu <josh.wu@atmel.com>,
	Alexandre Belloni <alexandre.belloni@free-electrons.com>,
	Nicolas Ferre <nicolas.ferre@atmel.com>,
	Maxime Ripard <maxime.ripard@free-electrons.com>,
	Lars-Peter Clausen <lars@metafoo.de>,
	Thomas Meyer <thomas@m3y3r.de>,
	Wei Yongjun <yongjun_wei@trendmicro.com.cn>,
	Sachin Kamat <sachin.kamat@linaro.org>,
	linux-iio@vger.kernel.org, kernel-janitors@vger.kernel.org
Subject: Re: [patch] iio: adc: at91: signedness bug in at91_adc_get_trigger_value_by_name()
Date: Wed, 11 Jun 2014 09:36:49 +0200	[thread overview]
Message-ID: <53980711.5030604@bfs.de> (raw)
In-Reply-To: <20140611065356.GB16443@mwanda>



Am 11.06.2014 08:53, schrieb Dan Carpenter:
> The function returns a u8 so the -ENOMEM is truncated to a positive
> value.  The caller tests for zero returns and treats them as an error
> so I have changed the -ENOMEM to 0.
> 
> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
> 
> diff --git a/drivers/iio/adc/at91_adc.c b/drivers/iio/adc/at91_adc.c
> index 3b5bacd..5ebe33d 100644
> --- a/drivers/iio/adc/at91_adc.c
> +++ b/drivers/iio/adc/at91_adc.c
> @@ -525,7 +525,7 @@ static u8 at91_adc_get_trigger_value_by_name(struct iio_dev *idev,
>  				idev->id,
>  				triggers[i].name);
>  		if (!name)
> -			return -ENOMEM;
> +			return 0;
>  
>  		if (strcmp(trigger_name, name) == 0) {
>  			value = triggers[i].value;


hi Dan,
LXR says there is only 1 caller (and he is checking for ENOMON)
perhaps it is better to change  the return value to int.

re,
 wh

  reply	other threads:[~2014-06-11  7:36 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-06-11  6:53 [patch] iio: adc: at91: signedness bug in at91_adc_get_trigger_value_by_name() Dan Carpenter
2014-06-11  6:53 ` Dan Carpenter
2014-06-11  7:36 ` walter harms [this message]
2014-06-11  7:36   ` walter harms
2014-06-11  8:12   ` Dan Carpenter
2014-06-11  8:12     ` Dan Carpenter
2014-06-11  8:27     ` walter harms
2014-06-11  8:27       ` walter harms
2014-06-11  8:13   ` [patch v2] " Dan Carpenter
2014-06-11  8:13     ` Dan Carpenter
2014-06-11 14:41     ` Alexandre Belloni
2014-06-11 14:41       ` Alexandre Belloni
2014-06-14 14:38       ` Jonathan Cameron
2014-06-14 14:38         ` Jonathan Cameron

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