From: Matt Porter <mporter@kernel.crashing.org>
Date: Wed, 27 Jul 2005 18:44:12 +0000 (-0700)
Subject: [PATCH] ppc32: fix dma_map_page() to use page_to_bus()
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=9f6a3d083729c76ced92106c259f0e6536a2eaea;p=GitHub%2FLineageOS%2Fandroid_kernel_samsung_universal7580.git

[PATCH] ppc32: fix dma_map_page() to use page_to_bus()

The following trivial patch changes dma_map_page() to use page_to_bus()
instead of open-coding it (incorrectly in some cases).

Signed-off-by: Eugene Surovegin <ebs@ebshome.net>
Signed-off-by: Matt Porter <mporter@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/include/asm-ppc/dma-mapping.h b/include/asm-ppc/dma-mapping.h
index 7f0487afebb..6f74f59938d 100644
--- a/include/asm-ppc/dma-mapping.h
+++ b/include/asm-ppc/dma-mapping.h
@@ -117,7 +117,7 @@ dma_map_page(struct device *dev, struct page *page,
 
 	__dma_sync_page(page, offset, size, direction);
 
-	return (page - mem_map) * PAGE_SIZE + PCI_DRAM_OFFSET + offset;
+	return page_to_bus(page) + offset;
 }
 
 /* We do nothing. */