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From:   Sasha Levin <sashal@kernel.org>
To:     linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc:     David Rientjes <rientjes@google.com>,
        Christoph Hellwig <hch@lst.de>, Sasha Levin <sashal@kernel.org>
Subject: [PATCH 5.7 146/265] dma-direct: add missing set_memory_decrypted() for coherent mapping
Date:   Mon, 29 Jun 2020 11:16:19 -0400
Message-Id: <20200629151818.2493727-147-sashal@kernel.org>
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From: David Rientjes <rientjes@google.com>

[ Upstream commit 1a2b3357e860d890f8045367b179c7e7e802cd71 ]

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@google.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 kernel/dma/direct.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/kernel/dma/direct.c b/kernel/dma/direct.c
index 98c445dcb308b..2270930f36f83 100644
--- a/kernel/dma/direct.c
+++ b/kernel/dma/direct.c
@@ -161,6 +161,12 @@ 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;
 	}
-- 
2.25.1