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| author | David Rientjes <rientjes@google.com> | 2020-06-11 12:20:29 -0700 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2020-06-17 09:29:38 +0200 |
| commit | 96a539fa3bb71f443ae08e57b9f63d6e5bb2207c (patch) | |
| tree | 629b9409853529afaf4e47afc668c5de2db56d7e /kernel/dma | |
| parent | 633d5fce78a61e8727674467944939f55b0bcfab (diff) | |
| download | linux-96a539fa3bb71f443ae08e57b9f63d6e5bb2207c.tar.gz linux-96a539fa3bb71f443ae08e57b9f63d6e5bb2207c.tar.bz2 linux-96a539fa3bb71f443ae08e57b9f63d6e5bb2207c.zip | |
dma-direct: re-encrypt memory if dma_direct_alloc_pages() fails
If arch_dma_set_uncached() fails after memory has been decrypted, it needs
to be re-encrypted before freeing.
Fixes: fa7e2247c572 ("dma-direct: make uncached_kernel_address more general")
Signed-off-by: David Rientjes <rientjes@google.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'kernel/dma')
| -rw-r--r-- | kernel/dma/direct.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/kernel/dma/direct.c b/kernel/dma/direct.c index c93e3c8e3d01..80d33f215a2e 100644 --- a/kernel/dma/direct.c +++ b/kernel/dma/direct.c @@ -220,7 +220,7 @@ void *dma_direct_alloc_pages(struct device *dev, size_t size, arch_dma_prep_coherent(page, size); ret = arch_dma_set_uncached(ret, size); if (IS_ERR(ret)) - goto out_free_pages; + goto out_encrypt_pages; } done: if (force_dma_unencrypted(dev)) @@ -228,6 +228,11 @@ done: else *dma_handle = phys_to_dma(dev, page_to_phys(page)); return ret; + +out_encrypt_pages: + if (force_dma_unencrypted(dev)) + set_memory_encrypted((unsigned long)page_address(page), + 1 << get_order(size)); out_free_pages: dma_free_contiguous(dev, page, size); return NULL; |