linux-kernel - Re: [PATCH 1/1] iio: gyro: bmg160: fix buffer read values

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Date:	Sun, 3 Apr 2016 11:23:39 +0100
From:	Jonathan Cameron <jic23@...nel.org>
To:	Irina Tirdea <irina.tirdea@...el.com>, linux-iio@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, Hartmut Knaack <knaack.h@....de>,
	Lars-Peter Clausen <lars@...afoo.de>,
	Peter Meerwald <pmeerw@...erw.net>,
	Markus Pargmann <mpa@...gutronix.de>
Subject: Re: [PATCH 1/1] iio: gyro: bmg160: fix buffer read values

On 28/03/16 18:15, Irina Tirdea wrote:
> When reading gyroscope axes using iio buffers, the values
> returned are always 0. In the interrupt handler, the return
> value of the read operation is returned to the user instead
> of the value read. Return the value read to the user.
> 
> This is also fixed in commit 82d8e5da1a33 ("iio:
> accel: bmg160: optimize transfers in trigger handler").
> 
> Signed-off-by: Irina Tirdea <irina.tirdea@...el.com>
Ouch.  Applied and marked for stable.

Jonathan
> ---
>  drivers/iio/gyro/bmg160_core.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/iio/gyro/bmg160_core.c b/drivers/iio/gyro/bmg160_core.c
> index 295cf1d..e165ce9 100644
> --- a/drivers/iio/gyro/bmg160_core.c
> +++ b/drivers/iio/gyro/bmg160_core.c
> @@ -781,7 +781,7 @@ static irqreturn_t bmg160_trigger_handler(int irq, void *p)
>  			mutex_unlock(&data->mutex);
>  			goto err;
>  		}
> -		data->buffer[i++] = ret;
> +		data->buffer[i++] = val;
>  	}
>  	mutex_unlock(&data->mutex);
>  
>