From: Dmitry Osipenko <digetx@gmail.com>
To: Sowjanya Komatineni <skomatineni@nvidia.com>,
thierry.reding@gmail.com, jonathanh@nvidia.com,
frankc@nvidia.com, hverkuil@xs4all.nl, sakari.ailus@iki.fi,
helen.koike@collabora.com
Cc: sboyd@kernel.org, linux-media@vger.kernel.org,
devicetree@vger.kernel.org, linux-clk@vger.kernel.org,
linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [RFC PATCH v9 6/9] media: tegra: Add Tegra210 Video input driver
Date: Fri, 24 Apr 2020 02:25:48 +0300 [thread overview]
Message-ID: <fce6dfbb-0b8d-319b-2d6f-976953a3c36c@gmail.com> (raw)
In-Reply-To: <3691c4b5-1ecc-2ad3-23ed-72ef6b8d25fa@nvidia.com>
24.04.2020 02:20, Sowjanya Komatineni пишет:
>
> On 4/23/20 4:19 PM, Sowjanya Komatineni wrote:
>>
>> On 4/23/20 4:16 PM, Dmitry Osipenko wrote:
>>> External email: Use caution opening links or attachments
>>>
>>>
>>> 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.
>>
>> no it will not. on error we report vb2_queue_error which will do
>> streaming stop request.
>>
>> So thread will be stopped on streaming stop request thru kthread stop
>> signal
> To be clear on error it reports vb2 queue error and waits for stop
> streaming to happen
If thread should exit on error, then it should do it on the actual
error. Otherwise it looks very error-prone.
next prev parent reply other threads:[~2020-04-23 23:25 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-22 6:18 [RFC PATCH v9 0/9] Add Tegra driver for video capture Sowjanya Komatineni
2020-04-22 6:18 ` [RFC PATCH v9 1/9] arm64: tegra: Fix sor powergate clocks and reset Sowjanya Komatineni
2020-04-22 6:18 ` [RFC PATCH v9 2/9] arm64: tegra: Add reset-cells to mc Sowjanya Komatineni
2020-04-22 6:18 ` [RFC PATCH v9 3/9] dt-bindings: clock: tegra: Add clk id for CSI TPG clock Sowjanya Komatineni
2020-04-22 6:18 ` [RFC PATCH v9 4/9] clk: tegra: Add Tegra210 CSI TPG clock gate Sowjanya Komatineni
2020-04-22 6:18 ` [RFC PATCH v9 5/9] dt-binding: tegra: Add VI and CSI bindings Sowjanya Komatineni
2020-04-22 17:20 ` Laurent Pinchart
2020-04-22 17:26 ` Sowjanya Komatineni
2020-04-22 17:47 ` Laurent Pinchart
2020-04-22 17:57 ` Sowjanya Komatineni
2020-04-22 6:18 ` [RFC PATCH v9 6/9] media: tegra: Add Tegra210 Video input driver Sowjanya Komatineni
2020-04-23 7:48 ` Hans Verkuil
2020-04-23 16:50 ` Sowjanya Komatineni
2020-04-23 22:55 ` Dmitry Osipenko
2020-04-23 22:59 ` Sowjanya Komatineni
2020-04-23 23:03 ` Dmitry Osipenko
2020-04-23 23:14 ` Dmitry Osipenko
2020-04-23 23:16 ` Dmitry Osipenko
2020-04-23 23:19 ` Sowjanya Komatineni
2020-04-23 23:20 ` Sowjanya Komatineni
2020-04-23 23:25 ` Dmitry Osipenko [this message]
2020-04-23 23:50 ` Sowjanya Komatineni
2020-04-24 0:42 ` Dmitry Osipenko
2020-04-24 0:51 ` Sowjanya Komatineni
2020-04-24 1:08 ` Sowjanya Komatineni
2020-04-24 2:09 ` Dmitry Osipenko
2020-04-24 2:12 ` Sowjanya Komatineni
2020-04-22 6:18 ` [RFC PATCH v9 7/9] MAINTAINERS: Add Tegra Video driver section Sowjanya Komatineni
2020-04-22 6:18 ` [RFC PATCH v9 8/9] dt-bindings: reset: Add ID for Tegra210 VI reset Sowjanya Komatineni
2020-04-22 6:18 ` [RFC PATCH v9 9/9] arm64: tegra: Add Tegra VI CSI support in device tree Sowjanya Komatineni
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