[U-Boot] [PATCH 1/2] efi_loader: run CreateEvent() notify function based on flags

[Jonathan Gray]

The UEFI specification states that the tpl, function and context
arguments are to be ignored if neither EVT_NOTIFY_WAIT or
EVT_NOTIFY_SIGNAL are specified.  This matches observed behaviour with
an AMI EDK2 based UEFI implementation.

Skip calling the notify function if neither flag is present.

Signed-off-by: Jonathan Gray <jsg at jsg.id.au>
---
 include/efi_api.h             | 3 +++
 lib/efi_loader/efi_boottime.c | 4 +++-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/include/efi_api.h b/include/efi_api.h
index 5c3836a51b..f071b36b53 100644
--- a/include/efi_api.h
+++ b/include/efi_api.h
@@ -28,6 +28,9 @@ enum efi_event_type {
 	EFI_TIMER_RELATIVE = 2
 };
 
+#define EVT_NOTIFY_WAIT		0x00000100
+#define EVT_NOTIFY_SIGNAL	0x00000200
+
 /* EFI Boot Services table */
 struct efi_boot_services {
 	struct efi_table_hdr hdr;
diff --git a/lib/efi_loader/efi_boottime.c b/lib/efi_loader/efi_boottime.c
index 51080cbeed..eb5946a959 100644
--- a/lib/efi_loader/efi_boottime.c
+++ b/lib/efi_loader/efi_boottime.c
@@ -210,7 +210,9 @@ void efi_timer_check(void)
 		/* Triggering! */
 		if (efi_event.trigger_type == EFI_TIMER_PERIODIC)
 			efi_event.trigger_next += efi_event.trigger_time / 10;
-		efi_event.notify_function(&efi_event, efi_event.notify_context);
+		if (efi_event.type & (EVT_NOTIFY_WAIT | EVT_NOTIFY_SIGNAL))
+			efi_event.notify_function(&efi_event,
+			                          efi_event.notify_context);
 	}
 
 	WATCHDOG_RESET();
-- 
2.12.0