提交 27d8e3d1 编写于 作者: B Bjorn Helgaas 提交者: Linus Torvalds

[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: NBjorn 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: N"Luck, Tony" <tony.luck@intel.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
上级 e9b0a071
......@@ -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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