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| author | Joerg Roedel <jroedel@suse.de> | 2019-01-23 08:46:29 +0100 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2019-01-23 13:51:05 +0100 |
| commit | da5d2748e4a4512237764d2a53bdf686eccee18b (patch) | |
| tree | 7c6ed292218c557c28da3b8cf0319ece25ec79a2 | |
| parent | 198bc3252ea3a45b0c5d500e6a5b91cfdd08f001 (diff) | |
| download | linux-da5d2748e4a4512237764d2a53bdf686eccee18b.tar.gz linux-da5d2748e4a4512237764d2a53bdf686eccee18b.tar.bz2 linux-da5d2748e4a4512237764d2a53bdf686eccee18b.zip | |
iommu/mediatek: Use correct fwspec in mtk_iommu_add_device()
The mtk_iommu_add_device() function keeps the fwspec in an
on-stack pointer and calls mtk_iommu_create_mapping(), which
might change its source, dev->iommu_fwspec. This causes the
on-stack pointer to be obsoleted and the device
initialization to fail. Update the on-stack fwspec pointer
after mtk_iommu_create_mapping() has been called.
Reported-by: Frank Wunderlich <frank-w@public-files.de>
Fixes: a9bf2eec5a6f ('iommu/mediatek: Use helper functions to access dev->iommu_fwspec')
Tested-by: Frank Wunderlich <frank-w@public-files.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
| -rw-r--r-- | drivers/iommu/mtk_iommu_v1.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/iommu/mtk_iommu_v1.c b/drivers/iommu/mtk_iommu_v1.c index 6ede4286b835..f60bdb85c4c0 100644 --- a/drivers/iommu/mtk_iommu_v1.c +++ b/drivers/iommu/mtk_iommu_v1.c @@ -442,6 +442,10 @@ static int mtk_iommu_add_device(struct device *dev) iommu_spec.args_count = count; mtk_iommu_create_mapping(dev, &iommu_spec); + + /* dev->iommu_fwspec might have changed */ + fwspec = dev_iommu_fwspec_get(dev); + of_node_put(iommu_spec.np); } |