linux-kernel - Re: [RFC PATCH v9 6/9] media: tegra: Add Tegra210 Video input driver

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Message-ID: <7e473fa9-0409-d868-e818-2e7928a8acca@gmail.com>
Date:   Fri, 24 Apr 2020 02:16:06 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Sowjanya Komatineni <skomatineni@...dia.com>,
        thierry.reding@...il.com, jonathanh@...dia.com, frankc@...dia.com,
        hverkuil@...all.nl, sakari.ailus@....fi, helen.koike@...labora.com
Cc:     sboyd@...nel.org, linux-media@...r.kernel.org,
        devicetree@...r.kernel.org, linux-clk@...r.kernel.org,
        linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH v9 6/9] media: tegra: Add Tegra210 Video input driver

22.04.2020 09:18, Sowjanya Komatineni пишет:
> +static int chan_capture_kthread_start(void *data)
> +{
> +	struct tegra_vi_channel *chan = data;
> +	struct tegra_channel_buffer *buf;
> +	int err = 0;
> +
> +	set_freezable();
> +
> +	while (1) {
> +		try_to_freeze();
> +
> +		wait_event_interruptible(chan->start_wait,
> +					 !list_empty(&chan->capture) ||
> +					 kthread_should_stop());
> +
> +		if (kthread_should_stop())
> +			break;
> +
> +		/*
> +		 * Source is not streaming if error is non-zero.
> +		 * So, do not dequeue buffers on capture error.
> +		 */
> +		if (err)
> +			continue;

This will result in an endless loop, I suppose it wasn't the intention.