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[fallback] Try to boot the first boot option anyway

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Some UEFI implementations never care the boot options, so the
restored boot options could be just ignored and this results in
endless reboot. To avoid this situation, this commit makes
fallback.efi to load the first matched boot option even if there
is no boot option to be restored. It may not be perfect, but at
least the bootloader is loaded...

Signed-off-by: Gary Ching-Pang Lin <glin@suse.com>
This commit is contained in:
Gary Ching-Pang Lin 2014-05-13 13:30:07 -04:00 committed by Peter Jones
parent 30cead3b40
commit 8bf83b55dc
1 changed files with 10 additions and 3 deletions
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13
fallback.c
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@ -226,8 +226,9 @@ add_boot_option(EFI_DEVICE_PATH *hddp, EFI_DEVICE_PATH *fulldp,
}
EFI_STATUS
find_boot_option(EFI_DEVICE_PATH *dp, CHAR16 *filename, CHAR16 *label,
CHAR16 *arguments, UINT16 *optnum)
find_boot_option(EFI_DEVICE_PATH *dp, EFI_DEVICE_PATH *fulldp,
CHAR16 *filename, CHAR16 *label, CHAR16 *arguments,
UINT16 *optnum)
{
unsigned int size = sizeof(UINT32) + sizeof (UINT16) +
StrLen(label)*2 + 2 + DevicePathSize(dp) +
@ -278,6 +279,12 @@ find_boot_option(EFI_DEVICE_PATH *dp, CHAR16 *filename, CHAR16 *label,
continue;
/* at this point, we have duplicate data. */
if (!first_new_option) {
first_new_option = DuplicateDevicePath(fulldp);
first_new_option_args = arguments;
first_new_option_size = StrLen(arguments) * sizeof (CHAR16);
}
*optnum = i;
FreePool(candidate);
FreePool(data);
@ -403,7 +410,7 @@ add_to_boot_list(EFI_FILE_HANDLE fh, CHAR16 *dirname, CHAR16 *filename, CHAR16 *
#endif
UINT16 option;
rc = find_boot_option(dp, fullpath, label, arguments, &option);
rc = find_boot_option(dp, full_device_path, fullpath, label, arguments, &option);
if (EFI_ERROR(rc)) {
add_boot_option(dp, full_device_path, fullpath, label, arguments);
} else if (option != 0) {