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SubjectRe: [PATCH 2/3] media: mtk-vcodec: add missing put_device() call in mtk_vcodec_init_dec_pm()
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On 24/09/2020 10:18, Yu Kuai wrote:
> if of_find_device_by_node() succeed, mtk_vcodec_init_dec_pm() doesn't have
> a corresponding put_device(). Thus add jump target to fix the exception
> handling for this function implementation.
>
> Fixes: 590577a4e525 ("[media] vcodec: mediatek: Add Mediatek V4L2 Video Decoder Driver")
> Signed-off-by: Yu Kuai <yukuai3@huawei.com>
> ---
> .../platform/mtk-vcodec/mtk_vcodec_dec_pm.c | 18 ++++++++++++------
> 1 file changed, 12 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_pm.c b/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_pm.c
> index 5a6ec8fb52da..01e680ede9bd 100644
> --- a/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_pm.c
> +++ b/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_pm.c
> @@ -48,11 +48,14 @@ int mtk_vcodec_init_dec_pm(struct mtk_vcodec_dev *mtkdev)
> dec_clk->clk_info = devm_kcalloc(&pdev->dev,
> dec_clk->clk_num, sizeof(*clk_info),
> GFP_KERNEL);
> - if (!dec_clk->clk_info)
> - return -ENOMEM;
> + if (!dec_clk->clk_info) {
> + ret = -ENOMEM;
> + goto put_device;
> + }
> } else {
> mtk_v4l2_err("Failed to get vdec clock count");
> - return -EINVAL;
> + ret = -EINVAL;
> + goto put_device;
> }
>
> for (i = 0; i < dec_clk->clk_num; i++) {
> @@ -61,19 +64,22 @@ int mtk_vcodec_init_dec_pm(struct mtk_vcodec_dev *mtkdev)
> "clock-names", i, &clk_info->clk_name);
> if (ret) {
> mtk_v4l2_err("Failed to get clock name id = %d", i);
> - return ret;
> + goto put_device;
> }
> clk_info->vcodec_clk = devm_clk_get(&pdev->dev,
> clk_info->clk_name);
> if (IS_ERR(clk_info->vcodec_clk)) {
> mtk_v4l2_err("devm_clk_get (%d)%s fail", i,
> clk_info->clk_name);
> - return PTR_ERR(clk_info->vcodec_clk);
> + ret = PTR_ERR(clk_info->vcodec_clk);
> + goto put_device;
> }
> }
>
> pm_runtime_enable(&pdev->dev);
> -
> + return 0;
> +put_device:
> + put_device(pm->larbvdec);
> return ret;
> }
>
>

A similar question as with the previous patch: shouldn't there be a
put_device(pm->larbvdec); in the mtk_vcodec_release_dec_pm() function?

Same for the next patch.

Regards,

Hans

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