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Subject[patch for-5.8 4/4] dma-direct: add missing set_memory_decrypted() for coherent mapping
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")
Cc: stable@vger.kernel.org # 5.5+
Signed-off-by: David Rientjes <rientjes@google.com>
---
kernel/dma/direct.c | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/kernel/dma/direct.c b/kernel/dma/direct.c
--- a/kernel/dma/direct.c
+++ b/kernel/dma/direct.c
@@ -195,6 +195,12 @@ 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;
}
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