The current code only clobbers a local variable, so the device is left
with a stale mapping pointer.
Cc: Hiroshi Doyu <hd...@nvidia.com>
Signed-off-by: Will Deacon <will.dea...@arm.com>
---
arch/arm/mm/dma-mapping.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
index d119de7..10282db 100644
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c
@@ -1921,7 +1921,7 @@ void arm_iommu_detach_device(struct device *dev)
iommu_detach_device(mapping->domain, dev);
kref_put(&mapping->kref, release_iommu_mapping);
- mapping = NULL;
+ dev->archdata.mapping = NULL;
set_dma_ops(dev, NULL);
pr_debug("Detached IOMMU controller from %s device.\n", dev_name(dev));
--
1.8.2.2
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