linux-kernel - Re: [PATCH v2 4/4] iio: pressure: hsc030pa add triggered buffer

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Message-ID: <Zb-1UGJt27OV-vjc@surfacebook.localdomain>
Date: Sun, 4 Feb 2024 18:03:28 +0200
From: andy.shevchenko@...il.com
To: Petre Rodan <petre.rodan@...dimension.ro>
Cc: linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
	Jonathan Cameron <jic23@...nel.org>,
	Lars-Peter Clausen <lars@...afoo.de>
Subject: Re: [PATCH v2 4/4] iio: pressure: hsc030pa add triggered buffer

Sat, Jan 27, 2024 at 06:03:58PM +0200, Petre Rodan kirjoitti:
> Add triggered buffer feature.

..

> +static irqreturn_t hsc_trigger_handler(int irq, void *private)
> +{
> +	struct iio_poll_func *pf = private;
> +	struct iio_dev *indio_dev = pf->indio_dev;
> +	struct hsc_data *data = iio_priv(indio_dev);
> +	int ret;
> +
> +	ret = hsc_get_measurement(data);
> +	if (ret)
> +		goto error;

> +	memcpy(&data->scan.chan[0], &data->buffer, 2);

You probably wanted here &data->buffer[0] as currently you use pointer to
the poiner.

> +	memcpy(&data->scan.chan[1], &data->buffer[2], 2);

Hmm... We don't have fixed-size memcpy() :-(

> +	iio_push_to_buffers_with_timestamp(indio_dev, &data->scan,
> +					   iio_get_time_ns(indio_dev));
> +
> +error:
> +	iio_trigger_notify_done(indio_dev->trig);
> +
> +	return IRQ_HANDLED;
> +}

-- 
With Best Regards,
Andy Shevchenko