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efi_loader: simplify efi_uninstall_protocol_interface

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Use function efi_search_obj, efi_search_protocol and
efi_remove_protocol to simplify the coding.

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 19:25:56 +02:00 committed by Alexander Graf
parent 42cf12420b
commit 5810511dac
1 changed files with 11 additions and 27 deletions
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38
lib/efi_loader/efi_boottime.c
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@ -906,9 +906,8 @@ static efi_status_t EFIAPI efi_uninstall_protocol_interface(
void *handle, const efi_guid_t *protocol,
void *protocol_interface)
{
struct list_head *lhandle;
int i;
efi_status_t r = EFI_NOT_FOUND;
struct efi_handler *handler;
efi_status_t r;
EFI_ENTRY("%p, %pUl, %p", handle, protocol, protocol_interface);
@ -917,31 +916,16 @@ static efi_status_t EFIAPI efi_uninstall_protocol_interface(
goto out;
}
list_for_each(lhandle, &efi_obj_list) {
struct efi_object *efiobj;
efiobj = list_entry(lhandle, struct efi_object, link);
if (efiobj->handle != handle)
continue;
for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
struct efi_handler *handler = &efiobj->protocols[i];
const efi_guid_t *hprotocol = handler->guid;
if (!hprotocol)
continue;
if (!guidcmp(hprotocol, protocol)) {
if (handler->protocol_interface) {
r = EFI_ACCESS_DENIED;
} else {
handler->guid = 0;
r = EFI_SUCCESS;
}
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 */
r = EFI_ACCESS_DENIED;
} else {
r = efi_remove_protocol(handle, protocol, protocol_interface);
}
out:
return EFI_EXIT(r);
}