From: Yong Wu yong.wu@mediatek.com
[ Upstream commit dcb40e9fcce9bd251eaff19f3724131db522846c ]
Add platform_device_put to match with of_find_device_by_node.
Meanwhile, I add a new variable "pcommdev" which is for smi common device. Otherwise, "platform_device_put(plarbdev)" for smi-common dev may be not readable. And add a checking for whether pcommdev is NULL.
Fixes: d2e9a1102cfc ("iommu/mediatek: Contain MM IOMMU flow with the MM TYPE") Signed-off-by: Yong Wu yong.wu@mediatek.com Reviewed-by: AngeloGioacchino Del Regno angelogioacchino.delregno@collabora.com Reviewed-by: Matthias Brugger matthias.bgg@gmail.com Link: https://lore.kernel.org/r/20221018024258.19073-2-yong.wu@mediatek.com Signed-off-by: Joerg Roedel jroedel@suse.de Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/iommu/mtk_iommu.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-)
diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c index 2d14dc846b83..febcca8fcbcf 100644 --- a/drivers/iommu/mtk_iommu.c +++ b/drivers/iommu/mtk_iommu.c @@ -1044,7 +1044,7 @@ static int mtk_iommu_mm_dts_parse(struct device *dev, struct component_match **m struct mtk_iommu_data *data) { struct device_node *larbnode, *smicomm_node, *smi_subcomm_node; - struct platform_device *plarbdev; + struct platform_device *plarbdev, *pcommdev; struct device_link *link; int i, larb_nr, ret;
@@ -1075,12 +1075,14 @@ static int mtk_iommu_mm_dts_parse(struct device *dev, struct component_match **m } if (!plarbdev->dev.driver) { of_node_put(larbnode); + platform_device_put(plarbdev); return -EPROBE_DEFER; } data->larb_imu[id].dev = &plarbdev->dev;
component_match_add_release(dev, match, component_release_of, component_compare_of, larbnode); + platform_device_put(plarbdev); }
/* Get smi-(sub)-common dev from the last larb. */ @@ -1098,12 +1100,15 @@ static int mtk_iommu_mm_dts_parse(struct device *dev, struct component_match **m else smicomm_node = smi_subcomm_node;
- plarbdev = of_find_device_by_node(smicomm_node); + pcommdev = of_find_device_by_node(smicomm_node); of_node_put(smicomm_node); - data->smicomm_dev = &plarbdev->dev; + if (!pcommdev) + return -ENODEV; + data->smicomm_dev = &pcommdev->dev;
link = device_link_add(data->smicomm_dev, dev, DL_FLAG_STATELESS | DL_FLAG_PM_RUNTIME); + platform_device_put(pcommdev); if (!link) { dev_err(dev, "Unable to link %s.\n", dev_name(data->smicomm_dev)); return -EINVAL;