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x86, efi: Fix PCI ROM handing in EFI boot stub, in 32-bit mode

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The 'Attributes' argument to pci->Attributes() function is 64-bit. So
when invoking in 32-bit mode it takes two registers, not just one.

This fixes memory corruption when booting via the 32-bit EFI boot stub.

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Cc: <stable@kernel.org>
Link: http://lkml.kernel.org/r/1358513837.2397.247.camel@shinybook.infradead.org
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Cc: Matt Fleming <matt.fleming@intel.com>
This commit is contained in:
David Woodhouse 2013-01-07 22:09:49 +00:00 committed by H. Peter Anvin
parent f791620fa7
commit b607e21267
1 changed files with 6 additions and 1 deletions
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7
arch/x86/boot/compressed/eboot.c
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@ -295,10 +295,15 @@ static efi_status_t setup_efi_pci(struct boot_params *params)
if (!pci)
continue;
#ifdef CONFIG_X86_64
status = efi_call_phys4(pci->attributes, pci,
EfiPciIoAttributeOperationGet, 0,
&attributes);
#else
status = efi_call_phys5(pci->attributes, pci,
EfiPciIoAttributeOperationGet, 0, 0,
&attributes);
#endif
if (status != EFI_SUCCESS)
continue;