Re: [PATCH v2 2/5] iommu/mediatek: Add error path for loop of mm_dts_parse

[Yong Wu <yong.wu@mediatek.com>]

On Thu, 2022-06-16 at 15:49 +0200, Matthias Brugger wrote:
> 
> On 16/06/2022 07:42, Yong Wu wrote:
> > The mtk_iommu_mm_dts_parse will parse the smi larbs nodes. if the
> > i+1
> > larb is parsed fail(return -EINVAL), we should of_node_put for the
> > 0..i
> > larbs. In the fail path, one of_node_put matches with
> > of_parse_phandle in
> > it.
> > 
> > Fixes: d2e9a1102cfc ("iommu/mediatek: Contain MM IOMMU flow with
> > the MM TYPE")
> > Signed-off-by: Yong Wu <yong.wu@mediatek.com>
> > ---
> >   drivers/iommu/mtk_iommu.c | 21 ++++++++++++++++-----
> >   1 file changed, 16 insertions(+), 5 deletions(-)
> > 
> > diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
> > index 3b2489e8a6dd..ab24078938bf 100644
> > --- a/drivers/iommu/mtk_iommu.c
> > +++ b/drivers/iommu/mtk_iommu.c
> > @@ -1071,12 +1071,12 @@ static int mtk_iommu_mm_dts_parse(struct
> > device *dev, struct component_match **m
> >   
> 
> Don't we need to call the goto also on error case of:
> 
> larbnode = of_parse_phandle(dev->of_node, "mediatek,larbs", i);

Thanks very much.

exactly right. I will add in next version.

> Regards,
> Matthias