On 11/06/2014 at 11:13:17 +0300, Dan Carpenter wrote :
> at91_adc_get_trigger_value_by_name() was returning -ENOMEM truncated to
> a positive u8 and that doesn't work. I've changed it to int and
> refactored it to preserve the error code.
>
> Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Acked-by: Alexandre Belloni <alexandre.belloni@xxxxxxxxxxxxxxxxxx>
Also, tested on an at91sam9g45ek.
> ---
> I'm not able to compile this code.
>
> v2: Preserve the -ENOMEM
>
> diff --git a/drivers/iio/adc/at91_adc.c b/drivers/iio/adc/at91_adc.c
> index 3b5bacd..2b6a9ce 100644
> --- a/drivers/iio/adc/at91_adc.c
> +++ b/drivers/iio/adc/at91_adc.c
> @@ -510,12 +510,11 @@ static int at91_adc_channel_init(struct iio_dev *idev)
> return idev->num_channels;
> }
>
> -static u8 at91_adc_get_trigger_value_by_name(struct iio_dev *idev,
> +static int at91_adc_get_trigger_value_by_name(struct iio_dev *idev,
> struct at91_adc_trigger *triggers,
> const char *trigger_name)
> {
> struct at91_adc_state *st = iio_priv(idev);
> - u8 value = 0;
> int i;
>
> for (i = 0; i < st->trigger_number; i++) {
> @@ -528,15 +527,16 @@ static u8 at91_adc_get_trigger_value_by_name(struct iio_dev *idev,
> return -ENOMEM;
>
> if (strcmp(trigger_name, name) == 0) {
> - value = triggers[i].value;
> kfree(name);
> - break;
> + if (triggers[i].value == 0)
> + return -EINVAL;
> + return triggers[i].value;
> }
>
> kfree(name);
> }
>
> - return value;
> + return -EINVAL;
> }
>
> static int at91_adc_configure_trigger(struct iio_trigger *trig, bool state)
> @@ -546,14 +546,14 @@ static int at91_adc_configure_trigger(struct iio_trigger *trig, bool state)
> struct iio_buffer *buffer = idev->buffer;
> struct at91_adc_reg_desc *reg = st->registers;
> u32 status = at91_adc_readl(st, reg->trigger_register);
> - u8 value;
> + int value;
> u8 bit;
>
> value = at91_adc_get_trigger_value_by_name(idev,
> st->trigger_list,
> idev->trig->name);
> - if (value == 0)
> - return -EINVAL;
> + if (value < 0)
> + return value;
>
> if (state) {
> st->buffer = kmalloc(idev->scan_bytes, GFP_KERNEL);
--
Alexandre Belloni, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
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