[PATCH] media: mediatek: vcodec: Fix a reference leak in mtk_vcodec_fw_vpu_init()

[Tzung-Bi Shih]

On Mon, Sep 15, 2025 at 08:09:38PM +0800, Haoxiang Li wrote:
> vpu_get_plat_device() increases the reference count of the returned
> platform device. However, when devm_kzalloc() fails, the reference
> is not released, causing a reference leak.
> 
> Fix this by calling put_device() on fw_pdev->dev before returning
> on the error path.
> 
> Fixes: e25a89f743b1 ("media: mtk-vcodec: potential dereference of null pointer")
> Cc: stable at vger.kernel.org
> Signed-off-by: Haoxiang Li <haoxiang_li2024 at 163.com>

The reference, taking via of_find_device_by_node(), needs to be dropped after
use.  mtk_vcodec_vpu_release() does but the error handling path doesn't.

Reviewed-by: Tzung-Bi Shih <tzungbi at kernel.org>