dma-direct: use the correct size for dma_set_encrypted()

commit 3be4562 upstream.

The third parameter of dma_set_encrypted() is a size in bytes rather than
the number of pages.

Fixes: 4d05647 ("dma-direct: factor out dma_set_{de,en}crypted helpers")
Signed-off-by: Dexuan Cui <[email protected]>
Reviewed-by: Robin Murphy <[email protected]>
Signed-off-by: Christoph Hellwig <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

Author: dcui

Diff for: kernel/dma/direct.c

@@ -357,7 +357,7 @@ void dma_direct_free(struct device *dev, size_t size,
 	} else {
 		if (IS_ENABLED(CONFIG_ARCH_HAS_DMA_CLEAR_UNCACHED))
 			arch_dma_clear_uncached(cpu_addr, size);
-		if (dma_set_encrypted(dev, cpu_addr, 1 << page_order))
+		if (dma_set_encrypted(dev, cpu_addr, size))
 			return;
 	}
 
@@ -392,15 +392,14 @@ void dma_direct_free_pages(struct device *dev, size_t size,
 		struct page *page, dma_addr_t dma_addr,
 		enum dma_data_direction dir)
 {
-	unsigned int page_order = get_order(size);
 	void *vaddr = page_address(page);
 
 	/* If cpu_addr is not from an atomic pool, dma_free_from_pool() fails */
 	if (IS_ENABLED(CONFIG_DMA_COHERENT_POOL) &&
 	    dma_free_from_pool(dev, vaddr, size))
 		return;
 
-	if (dma_set_encrypted(dev, vaddr, 1 << page_order))
+	if (dma_set_encrypted(dev, vaddr, size))
 		return;
 	__dma_direct_free_pages(dev, page, size);
 }