This is a note to let you know that I've just added the patch titled
iommu/mediatek-v1: Fix an error handling path in mtk_iommu_v1_probe()
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
iommu-mediatek-v1-fix-an-error-handling-path-in-mtk_iommu_v1_probe.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 142e821f68cf5da79ce722cb9c1323afae30e185 Mon Sep 17 00:00:00 2001
From: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>
Date: Mon, 19 Dec 2022 19:06:22 +0100
Subject: iommu/mediatek-v1: Fix an error handling path in mtk_iommu_v1_probe()
From: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>
commit 142e821f68cf5da79ce722cb9c1323afae30e185 upstream.
A clk, prepared and enabled in mtk_iommu_v1_hw_init(), is not released in
the error handling path of mtk_iommu_v1_probe().
Add the corresponding clk_disable_unprepare(), as already done in the
remove function.
Fixes: b17336c55d89 ("iommu/mediatek: add support for mtk iommu generation one HW")
Signed-off-by: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>
Reviewed-by: Yong Wu <yong.wu@xxxxxxxxxxxx>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>
Reviewed-by: Matthias Brugger <matthias.bgg@xxxxxxxxx>
Link: https://lore.kernel.org/r/593e7b7d97c6e064b29716b091a9d4fd122241fb.1671473163.git.christophe.jaillet@xxxxxxxxxx
Signed-off-by: Joerg Roedel <jroedel@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/iommu/mtk_iommu_v1.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
--- a/drivers/iommu/mtk_iommu_v1.c
+++ b/drivers/iommu/mtk_iommu_v1.c
@@ -655,7 +655,7 @@ static int mtk_iommu_probe(struct platfo
ret = iommu_device_sysfs_add(&data->iommu, &pdev->dev, NULL,
dev_name(&pdev->dev));
if (ret)
- return ret;
+ goto out_clk_unprepare;
ret = iommu_device_register(&data->iommu, &mtk_iommu_ops, dev);
if (ret)
@@ -678,6 +678,8 @@ out_dev_unreg:
iommu_device_unregister(&data->iommu);
out_sysfs_remove:
iommu_device_sysfs_remove(&data->iommu);
+out_clk_unprepare:
+ clk_disable_unprepare(data->bclk);
return ret;
}
Patches currently in stable-queue which might be from christophe.jaillet@xxxxxxxxxx are
queue-5.15/iommu-mediatek-v1-fix-an-error-handling-path-in-mtk_iommu_v1_probe.patch
