6.17-stable review patch. If anyone has any objections, please let me know.
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From: Johan Hovold johan@kernel.org
[ Upstream commit 6ab4f79ea92324f7f2eb22692054a34bbba7cf35 ]
Make sure to drop the references taken by of_find_device_by_node() when looking up the thermal sensor and opp devices during probe on probe failure (e.g. probe deferral) and on driver unbind.
Fixes: 681a02e95000 ("soc: mediatek: SVS: introduce MTK SVS engine") Cc: Roger Lu roger.lu@mediatek.com Signed-off-by: Johan Hovold johan@kernel.org Reviewed-by: AngeloGioacchino Del Regno angelogioacchino.delregno@collabora.com Link: https://lore.kernel.org/r/20250909095651.5530-2-johan@kernel.org Signed-off-by: Matthias Brugger matthias.bgg@gmail.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/soc/mediatek/mtk-svs.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+)
diff --git a/drivers/soc/mediatek/mtk-svs.c b/drivers/soc/mediatek/mtk-svs.c index 7c349a94b45c0..48804e1e5a6c8 100644 --- a/drivers/soc/mediatek/mtk-svs.c +++ b/drivers/soc/mediatek/mtk-svs.c @@ -2165,6 +2165,13 @@ static struct device *svs_add_device_link(struct svs_platform *svsp, return dev; }
+static void svs_put_device(void *_dev) +{ + struct device *dev = _dev; + + put_device(dev); +} + static int svs_mt8192_platform_probe(struct svs_platform *svsp) { struct device *dev; @@ -2216,11 +2223,13 @@ static int svs_mt8183_platform_probe(struct svs_platform *svsp) { struct device *dev; u32 idx; + int ret;
dev = svs_add_device_link(svsp, "thermal-sensor"); if (IS_ERR(dev)) return dev_err_probe(svsp->dev, PTR_ERR(dev), "failed to get thermal device\n"); + put_device(dev);
for (idx = 0; idx < svsp->bank_max; idx++) { struct svs_bank *svsb = &svsp->banks[idx]; @@ -2230,6 +2239,7 @@ static int svs_mt8183_platform_probe(struct svs_platform *svsp) case SVSB_SWID_CPU_LITTLE: case SVSB_SWID_CPU_BIG: svsb->opp_dev = get_cpu_device(bdata->cpu_id); + get_device(svsb->opp_dev); break; case SVSB_SWID_CCI: svsb->opp_dev = svs_add_device_link(svsp, "cci"); @@ -2246,6 +2256,11 @@ static int svs_mt8183_platform_probe(struct svs_platform *svsp) return dev_err_probe(svsp->dev, PTR_ERR(svsb->opp_dev), "failed to get OPP device for bank %d\n", idx); + + ret = devm_add_action_or_reset(svsp->dev, svs_put_device, + svsb->opp_dev); + if (ret) + return ret; }
return 0;