From: David Rientjes <rientjes@xxxxxxxxxx>
upstream 1a2b3357e860d890f8045367b179c7e7e802cd71 commit.
When a coherent mapping is created in dma_direct_alloc_pages(), it needs
to be decrypted if the device requires unencrypted DMA before returning.
Fixes: 3acac065508f ("dma-mapping: merge the generic remapping helpers into dma-direct")
Signed-off-by: David Rientjes <rientjes@xxxxxxxxxx>
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Signed-off-by: Peter Gonda <pgonda@xxxxxxxxxx>
---
kernel/dma/direct.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/kernel/dma/direct.c b/kernel/dma/direct.c
index ac611b4f65b9..6c677ffdbd53 100644
--- a/kernel/dma/direct.c
+++ b/kernel/dma/direct.c
@@ -209,6 +209,12 @@ void *dma_direct_alloc_pages(struct device *dev, size_t size,
__builtin_return_address(0));
if (!ret)
goto out_free_pages;
+ if (force_dma_unencrypted(dev)) {
+ err = set_memory_decrypted((unsigned long)ret,
+ 1 << get_order(size));
+ if (err)
+ goto out_free_pages;
+ }
memset(ret, 0, size);
goto done;
}
--
2.28.0.618.gf4bc123cb7-goog
