From 27d8e3d15bcf9d7cd99bf6ca910ea9e34328c7fb Mon Sep 17 00:00:00 2001
From: Bjorn Helgaas <bjorn.helgaas@hp.com>
Date: Sun, 26 Mar 2006 01:37:07 -0800
Subject: [PATCH] [PATCH] DMI: only ioremap stuff we actually need
dmi_scan_machine() tries to ioremap 0x10000 (64K) bytes, even though it only
looks at the first 32 bytes or so. If the SMBIOS table is near the end of a
memory region, the ioremap() may fail when it shouldn't.
This is in the efi_enabled path, so it really only affects ia64 at the moment.
Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Cc: Matt Domsch <Matt_Domsch@dell.com>
Cc: "Tolentino, Matthew E" <matthew.e.tolentino@intel.com>
Cc: "Brown, Len" <len.brown@intel.com>
Cc: Andi Kleen <ak@muc.de>
Acked-by: "Luck, Tony" <tony.luck@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
arch/i386/kernel/dmi_scan.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/i386/kernel/dmi_scan.c b/arch/i386/kernel/dmi_scan.c
index bfecbd46f22a..c032f9e06bb6 100644
--- a/arch/i386/kernel/dmi_scan.c
+++ b/arch/i386/kernel/dmi_scan.c
@@ -224,7 +224,7 @@ void __init dmi_scan_machine(void)
* needed during early boot. This also means we can
* iounmap the space when we're done with it.
*/
- p = dmi_ioremap((unsigned long)efi.smbios, 0x10000);
+ p = dmi_ioremap((unsigned long)efi.smbios, 32);
if (p == NULL)
goto out;
--
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