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efi_loader: disconnect controllers in UninstallProtocol

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The UninstallProtocol boot service should first try to
disconnect controllers that have been connected with
EFI_OPEN_PROTOCOL_BY_DRIVER.

If the protocol is still opened by an agent, it should be
closed.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Heinrich Schuchardt 2018-01-11 08:16:05 +01:00 • committed by Alexander Graf
parent 3f9b00425a
commit ad97373ba9
1 changed files with 23 additions and 6 deletions
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29
lib/efi_loader/efi_boottime.c
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@ -1076,26 +1076,43 @@ static efi_status_t EFIAPI efi_uninstall_protocol_interface(
void *handle, const efi_guid_t *protocol,
void *protocol_interface)
{
struct efi_object *efiobj;
struct efi_handler *handler;
struct efi_open_protocol_info_item *item;
struct efi_open_protocol_info_item *pos;
efi_status_t r;
EFI_ENTRY("%p, %pUl, %p", handle, protocol, protocol_interface);
if (!handle || !protocol) {
/* Check handle */
efiobj = efi_search_obj(handle);
if (!efiobj) {
r = EFI_INVALID_PARAMETER;
goto out;
}
/* Find the protocol on the handle */
r = efi_search_protocol(handle, protocol, &handler);
if (r != EFI_SUCCESS)
goto out;
if (handler->protocol_interface) {
/* TODO disconnect controllers */
/* Disconnect controllers */
efi_disconnect_all_drivers(efiobj, protocol, NULL);
if (!list_empty(&handler->open_infos)) {
r = EFI_ACCESS_DENIED;
} else {
r = efi_remove_protocol(handle, protocol, protocol_interface);
goto out;
}
/* Close protocol */
list_for_each_entry_safe(item, pos, &handler->open_infos, link) {
if (item->info.attributes ==
EFI_OPEN_PROTOCOL_BY_HANDLE_PROTOCOL ||
item->info.attributes == EFI_OPEN_PROTOCOL_GET_PROTOCOL ||
item->info.attributes == EFI_OPEN_PROTOCOL_TEST_PROTOCOL)
list_del(&item->link);
}
if (!list_empty(&handler->open_infos)) {
r = EFI_ACCESS_DENIED;
goto out;
}
r = efi_remove_protocol(handle, protocol, protocol_interface);
out:
return EFI_EXIT(r);
}