iommu/mediatek: Use correct fwspec in mtk_iommu_add_device()

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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: a9bf2eec5a ('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>

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Joerg Roedel 2019-01-23 08:46:29 +01:00

parent 198bc3252e

commit da5d2748e4

1 changed files with 4 additions and 0 deletions

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drivers/iommu/mtk_iommu_v1.c

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