memory: mtk-smi: fix device leak on larb probe

Make sure to drop the reference taken when looking up the SMI device
during larb probe on late probe failure (e.g. probe deferral) and on
driver unbind.

Fixes: cc8bbe1a8312 ("memory: mediatek: Add SMI driver")
Fixes: 038ae37c510f ("memory: mtk-smi: add missing put_device() call in mtk_smi_device_link_common")
Cc: stable@vger.kernel.org	# 4.6: 038ae37c510f
Cc: stable@vger.kernel.org	# 4.6
Cc: Yong Wu <yong.wu@mediatek.com>
Cc: Miaoqian Lin <linmq006@gmail.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://patch.msgid.link/20251121164624.13685-3-johan@kernel.org
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

diff --git a/drivers/memory/mtk-smi.c b/drivers/memory/mtk-smi.c
index dd6150d200e89d12d7c8466347ee76a93b72630e..3609bfd3c64be32f9206fd248705e580221f471f 100644 (file)
--- a/drivers/memory/mtk-smi.c
+++ b/drivers/memory/mtk-smi.c
@@ -685,6 +685,7 @@ static void mtk_smi_larb_remove(struct platform_device *pdev)
        device_link_remove(&pdev->dev, larb->smi_common_dev);
        pm_runtime_disable(&pdev->dev);
        component_del(&pdev->dev, &mtk_smi_larb_component_ops);
+       put_device(larb->smi_common_dev);
 }
 
 static int __maybe_unused mtk_smi_larb_resume(struct device *dev)