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efi_loader: factor out efi_check_register_notify_event()

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The code to check if a registration key is a valid key returned by
RegisterProtocolNotify() can be reused. So let us factor it out into a new
function efi_check_register_notify_event().

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
This commit is contained in:
Heinrich Schuchardt 2019-05-29 07:46:33 +02:00
parent 8eee1d3ec6
commit b8abd743ff
1 changed files with 23 additions and 8 deletions
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31
lib/efi_loader/efi_boottime.c
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@ -1388,6 +1388,27 @@ static int efi_search(enum efi_locate_search_type search_type,
}
}
/**
* efi_check_register_notify_event() - check if registration key is valid
*
* Check that a pointer is a valid registration key as returned by
* RegisterProtocolNotify().
*
* @key: registration key
* Return: valid registration key or NULL
*/
static struct efi_register_notify_event *efi_check_register_notify_event
(void *key)
{
struct efi_register_notify_event *event;
list_for_each_entry(event, &efi_register_notify_events, link) {
if (event == (struct efi_register_notify_event *)key)
return event;
}
return NULL;
}
/**
* efi_locate_handle() - locate handles implementing a protocol
*
@ -1409,7 +1430,7 @@ static efi_status_t efi_locate_handle(
{
struct efi_object *efiobj;
efi_uintn_t size = 0;
struct efi_register_notify_event *item, *event = NULL;
struct efi_register_notify_event *event;
struct efi_protocol_notification *handle = NULL;
/* Check parameters */
@ -1420,13 +1441,7 @@ static efi_status_t efi_locate_handle(
if (!search_key)
return EFI_INVALID_PARAMETER;
/* Check that the registration key is valid */
list_for_each_entry(item, &efi_register_notify_events, link) {
if (item ==
(struct efi_register_notify_event *)search_key) {
event = item;
break;
}
}
event = efi_check_register_notify_event(search_key);
if (!event)
return EFI_INVALID_PARAMETER;
break;