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efi_loader implement UninstallMultipleProtocolInterfaces

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Implement UninstallMultipleProtocolInterfaces.
The efi_uninstall_multipled_protocol_interfaces tries to
uninstall protocols one by one. If an error occurs all
uninstalled protocols are reinstalled.

As the implementation efi_uninstall_protocol_interface is
still incomplete the function will fail.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Heinrich Schuchardt
2017-10-26 19:25:44 +02:00
committed by Alexander Graf
parent af1408e080
commit 843ce54c74
1 changed files with 39 additions and 1 deletions
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38
lib/efi_loader/efi_boottime.c
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@@ -1809,7 +1809,45 @@ static efi_status_t EFIAPI efi_uninstall_multiple_protocol_interfaces(
void *handle, ...) void *handle, ...)
{ {
EFI_ENTRY("%p", handle); EFI_ENTRY("%p", handle);
va_list argptr;
const efi_guid_t *protocol;
void *protocol_interface;
efi_status_t r = EFI_SUCCESS;
size_t i = 0;
if (!handle)
return EFI_EXIT(EFI_INVALID_PARAMETER); return EFI_EXIT(EFI_INVALID_PARAMETER);
va_start(argptr, handle);
for (;;) {
protocol = va_arg(argptr, efi_guid_t*);
if (!protocol)
break;
protocol_interface = va_arg(argptr, void*);
r = EFI_CALL(efi_uninstall_protocol_interface(
handle, protocol,
protocol_interface));
if (r != EFI_SUCCESS)
break;
i++;
}
va_end(argptr);
if (r == EFI_SUCCESS)
return EFI_EXIT(r);
/* If an error occurred undo all changes. */
va_start(argptr, handle);
for (; i; --i) {
protocol = va_arg(argptr, efi_guid_t*);
protocol_interface = va_arg(argptr, void*);
EFI_CALL(efi_install_protocol_interface(&handle, protocol,
EFI_NATIVE_INTERFACE,
protocol_interface));
}
va_end(argptr);
return EFI_EXIT(r);
} }
/* /*