linux-kernel - Re: [PATCH] drm/mediatek: add missing put_device() call in mtk_ddp_comp

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Message-ID: <e10c0375-8ef3-a2ba-b23f-f80d082e1ba7@huawei.com>
Date:   Tue, 8 Sep 2020 09:05:13 +0800
From:   "yukuai (C)" <yukuai3@...wei.com>
To:     Chun-Kuang Hu <chunkuang.hu@...nel.org>
CC:     Philipp Zabel <p.zabel@...gutronix.de>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Matthias Brugger <matthias.bgg@...il.com>,
        <yt.shen@...iatek.com>, CK Hu <ck.hu@...iatek.com>,
        Bibby Hsieh <bibby.hsieh@...iatek.com>,
        Yongqiang Niu <yongqiang.niu@...iatek.com>,
        "DRI Development" <dri-devel@...ts.freedesktop.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-mediatek@...ts.infradead.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        <yi.zhang@...wei.com>
Subject: Re: [PATCH] drm/mediatek: add missing put_device() call in
 mtk_ddp_comp_init()

On 2020/09/08 6:56, Chun-Kuang Hu wrote:
> Hi Yu Kuai:
> 
> Yu Kuai <yukuai3@...wei.com> 於 2020年9月5日 週六 下午4:31寫道：
>>
>> if of_find_device_by_node() succeed, mtk_ddp_comp_init() doesn't have
>> a corresponding put_device(). Thus add put_device() to fix the exception
>> handling for this function implementation.
>>
> 
> This patch looks good to me, but I find another thing related to this.
> mtk_ddp_comp_init() is called in a loop in mtk_drm_probe(), when this
> component init fail, I think we should uninitialize previous
> successive init component and put their device. Would you like to make
> this patch more complete?

Hi,

Of course, thank you for your review.

Best regards,
Yu Kuai