From: Sowjanya Komatineni <skomatineni@nvidia.com>
To: Thierry Reding <thierry.reding@gmail.com>
Cc: <jonathanh@nvidia.com>, <frankc@nvidia.com>, <hverkuil@xs4all.nl>,
<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: Re: Re: [RFC PATCH v1 4/5] media: tegra: Add Tegra Video input driver for Tegra210
Date: Thu, 30 Jan 2020 09:02:21 -0800 [thread overview]
Message-ID: <5a45782a-d88f-099a-f3b6-3c0255131f6b@nvidia.com> (raw)
In-Reply-To: <20200130122055.GA2584455@ulmo>
On 1/30/20 4:20 AM, Thierry Reding wrote:
> On Wed, Jan 29, 2020 at 09:23:38AM -0800, Sowjanya Komatineni wrote:
>> On 1/29/20 3:13 AM, Thierry Reding wrote:
>>> On Tue, Jan 28, 2020 at 10:23:20AM -0800, Sowjanya Komatineni wrote:
> [...]
>>>> diff --git a/drivers/staging/media/tegra/host1x-video.c b/drivers/staging/media/tegra/host1x-video.c
> [...]
>>>> + media_device_init(&cam->media_dev);
>>>> + ret = media_device_register(&cam->media_dev);
>>>> + if (ret < 0) {
>>>> + dev_err(cam->dev, "failed to register media device: %d\n", ret);
>>>> + return ret;
>>>> + }
>>>> +
>>>> + cam->v4l2_dev.mdev = &cam->media_dev;
>>>> + ret = v4l2_device_register(cam->dev, &cam->v4l2_dev);
>>>> + if (ret < 0) {
>>>> + dev_err(cam->dev, "V4L2 device registration failed: %d\n", ret);
>>>> + goto register_error;
>>>> + }
>>>> +
>>>> + dev_set_drvdata(&dev->dev, cam);
>>>> +
>>>> + ret = host1x_device_init(dev);
>>>> + if (ret < 0)
>>>> + goto dev_exit;
>>>> +
>>>> + return 0;
>>>> +
>>>> +dev_exit:
>>>> + host1x_device_exit(dev);
>>> There should be no need to call host1x_device_exit() when
>>> host1x_device_init() failed because the latter already takes care of
>>> undoing whatever it did already.
>>>
>> host1x_device_init can fail if any of its client ops init fails.
>>
>> So, calling host1x_device_exit here to undo the things done in other
>> successful client init ops.
> host1x_device_init() already takes care of undoing what it did on
> failure. Also, it makes sure to only undo what had already been done,
> rather than tear down every client, even if it hadn't been initialized
> yet when the failure happened. The latter is what would happen if you
> called host1x_device_exit() to cleanup at this point.
>
> Thierry
Sorry, yes I see host1x_device_init calls exit ops on failures .
Will remove it. Thanks Thierry.
next prev parent reply other threads:[~2020-01-30 17:02 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-28 18:23 [RFC PATCH v1 0/5] Add Tegra driver for video capture Sowjanya Komatineni
2020-01-28 18:23 ` [RFC PATCH v1 1/5] dt-bindings: clock: tegra: Add clk id for CSI TPG clock Sowjanya Komatineni
2020-02-05 19:23 ` Stephen Boyd
2020-01-28 18:23 ` [RFC PATCH v1 2/5] clk: tegra: Add Tegra210 CSI TPG clock gate Sowjanya Komatineni
2020-02-05 19:23 ` Stephen Boyd
2020-01-28 18:23 ` [RFC PATCH v1 3/5] dt-binding: tegra: Add VI and CSI bindings Sowjanya Komatineni
2020-01-28 20:32 ` Helen Koike
2020-01-28 21:04 ` Sowjanya Komatineni
2020-01-28 18:23 ` [RFC PATCH v1 4/5] media: tegra: Add Tegra Video input driver for Tegra210 Sowjanya Komatineni
2020-01-28 21:45 ` Helen Koike
2020-01-28 22:13 ` Sowjanya Komatineni
2020-01-29 0:49 ` Sowjanya Komatineni
2020-01-29 1:05 ` Helen Koike
2020-01-29 2:11 ` Sowjanya Komatineni
2020-01-29 5:59 ` Sowjanya Komatineni
2020-01-29 10:31 ` Helen Koike
2020-01-29 17:49 ` Sowjanya Komatineni
2020-01-29 18:15 ` Sowjanya Komatineni
2020-01-29 18:46 ` Helen Koike
2020-01-29 22:40 ` Sowjanya Komatineni
2020-01-29 18:29 ` Helen Koike
2020-01-29 18:46 ` Sowjanya Komatineni
2020-01-29 10:09 ` Thierry Reding
2020-01-29 16:25 ` Sowjanya Komatineni
2020-01-29 11:13 ` Thierry Reding
2020-01-29 17:23 ` Sowjanya Komatineni
2020-01-30 12:20 ` Thierry Reding
2020-01-30 17:02 ` Sowjanya Komatineni [this message]
2020-01-29 14:16 ` Hans Verkuil (hansverk)
2020-01-29 17:27 ` Sowjanya Komatineni
2020-01-30 14:45 ` Hans Verkuil
2020-02-05 19:26 ` Stephen Boyd
2020-02-05 19:54 ` Sowjanya Komatineni
2020-01-28 18:23 ` [RFC PATCH v1 5/5] arm64: tegra: Add Tegra VI CSI suppport in device tree Sowjanya Komatineni
2020-01-29 9:46 ` Thierry Reding
2020-01-29 16:22 ` Sowjanya Komatineni
2020-01-30 12:36 ` Thierry Reding
2020-01-30 17:18 ` Sowjanya Komatineni
2020-01-30 17:58 ` Thierry Reding
2020-01-30 18:58 ` Sowjanya Komatineni
2020-01-30 20:18 ` Sowjanya Komatineni
2020-01-31 2:57 ` Sowjanya Komatineni
2020-01-30 14:41 ` [RFC PATCH v1 0/5] Add Tegra driver for video capture Hans Verkuil
2020-01-30 15:42 ` Thierry Reding
2020-01-31 14:29 ` Hans Verkuil
2020-01-31 17:03 ` Thierry Reding
2020-01-31 17:37 ` Hans Verkuil
2020-01-31 20:31 ` Thierry Reding
2020-02-04 9:50 ` Hans Verkuil
2020-01-30 17:20 ` Sowjanya Komatineni
2020-02-04 12:53 ` Hans Verkuil
2020-02-04 16:42 ` Sowjanya Komatineni
2020-02-04 17:22 ` Hans Verkuil
2020-02-04 19:02 ` Sowjanya Komatineni
2020-02-05 7:57 ` Hans Verkuil
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