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authorYinghai Lu <yinghai@kernel.org>2009-10-11 14:17:16 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-10-11 14:43:36 -0700
commit15b812f1d0a5ca8f5efe7f5882f468af10682ca8 (patch)
tree5dc75e0b963b603813b9f012ed3ed848ebba32e3
parentf144c78e525542c94e0dcb171b41cc5ef7b341b3 (diff)
pci: increase alignment to make more space for hidden code
As reported in http://bugzilla.kernel.org/show_bug.cgi?id=13940 on some system when acpi are enabled, acpi clears some BAR for some devices without reason, and kernel will need to allocate devices for them. It then apparently hits some undocumented resource conflict, resulting in non-working devices. Try to increase alignment to get more safe range for unassigned devices. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--arch/x86/kernel/e820.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c
index 85419bb7d4ab..d17d482a04f4 100644
--- a/arch/x86/kernel/e820.c
+++ b/arch/x86/kernel/e820.c
@@ -1378,8 +1378,8 @@ static unsigned long ram_alignment(resource_size_t pos)
if (mb < 16)
return 1024*1024;
- /* To 32MB for anything above that */
- return 32*1024*1024;
+ /* To 64MB for anything above that */
+ return 64*1024*1024;
}
#define MAX_RESOURCE_SIZE ((resource_size_t)-1)