From 509c0b22d53a8d51e0f9a789dcd52c9ee002195a Mon Sep 17 00:00:00 2001
From: Ingo Weinhold <ingo_weinhold@gmx.de>
Date: Mon, 21 Jun 2010 21:48:02 +0000
Subject: [PATCH] Radeon_PrepareDMA(): Fail when encountering physical
 addresses > 4 GB.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37214 a95241bf-73f2-0310-859d-f6bbb57e9c96
---
 src/add-ons/kernel/drivers/graphics/radeon/DMA.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/add-ons/kernel/drivers/graphics/radeon/DMA.c b/src/add-ons/kernel/drivers/graphics/radeon/DMA.c
index 6a423755ea..429e072fd2 100644
--- a/src/add-ons/kernel/drivers/graphics/radeon/DMA.c
+++ b/src/add-ons/kernel/drivers/graphics/radeon/DMA.c
@@ -88,6 +88,15 @@ static status_t Radeon_PrepareDMA(
 			if( contig_size == 0 )
 				break;
 
+#if B_HAIKU_PHYSICAL_BITS > 32
+			if (address + contig_size > (phys_addr_t)1 << 32) {
+				SHOW_ERROR(2, "Physical address > 4 GB: %#" B_PRIxPHYSADDR
+					"size: %#" B_PRIxSIZE, address, size);
+				res = B_BAD_VALUE;
+				goto err;
+			}
+#endif
+
 			target += contig_size;
 
 			while( contig_size > 0 ) {