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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: 3acac06550 ("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>
This commit is contained in:
David Rientjes 2020-06-11 12:20:32 -07:00 committed by Christoph Hellwig
parent 56fccf21d1
commit 1a2b3357e8
1 changed files with 6 additions and 0 deletions
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6
kernel/dma/direct.c
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@ -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;
}