commit 4d66489a5a7547da7814e77e58591c39347b435e
author Heinrich Schuchardt <xypron.glpk@gmx.de> Fri Aug 18 17:45:16 2017 +0200
committer Alexander Graf <agraf@suse.de> Mon Sep 18 23:53:56 2017 +0200
tree 2f7e804d6be32316467c9c010d30bc4e2a8b51ad
parent 4a4c6466b23889e3aefebd5d4a0e950701675922

efi_loader: write protocol GUID in OpenProtocol

To understand what is happening in OpenProtocol or LocateProtocol
it is necessary to know the protocol interface GUID.
Let's write a debug message.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Alexander Graf <agraf@suse.de>

include/efi_loader.h

diff --git a/include/efi_loader.h b/include/efi_loader.h
index 1179234..46d684f 100644
--- a/include/efi_loader.h
+++ b/include/efi_loader.h
@@ -17,6 +17,7 @@
 
 int __efi_entry_check(void);
 int __efi_exit_check(void);
+const char *__efi_nesting(void);
 const char *__efi_nesting_inc(void);
 const char *__efi_nesting_dec(void);
 
@@ -51,6 +52,13 @@
 	debug("%sEFI: Return From: %s\n", __efi_nesting_dec(), #exp); \
 	} while(0)
 
+/*
+ * Write GUID
+ */
+#define EFI_PRINT_GUID(txt, guid) ({ \
+	debug("%sEFI: %s %pUl\n", __efi_nesting(), txt, guid); \
+	})
+
 extern struct efi_runtime_services efi_runtime_services;
 extern struct efi_system_table systab;
 

lib/efi_loader/efi_boottime.c

diff --git a/lib/efi_loader/efi_boottime.c b/lib/efi_loader/efi_boottime.c
index ea953dc..99c5a6e 100644
--- a/lib/efi_loader/efi_boottime.c
+++ b/lib/efi_loader/efi_boottime.c
@@ -109,6 +109,11 @@
 	return &indent[max - level];
 }
 
+const char *__efi_nesting(void)
+{
+	return indent_string(nesting_level);
+}
+
 const char *__efi_nesting_inc(void)
 {
 	return indent_string(nesting_level++);
@@ -1021,6 +1026,8 @@
 	if (!protocol || !protocol_interface)
 		return EFI_EXIT(EFI_INVALID_PARAMETER);
 
+	EFI_PRINT_GUID("protocol", protocol);
+
 	list_for_each(lhandle, &efi_obj_list) {
 		struct efi_object *efiobj;
 
@@ -1134,6 +1141,8 @@
 		goto out;
 	}
 
+	EFI_PRINT_GUID("protocol", protocol);
+
 	switch (attributes) {
 	case EFI_OPEN_PROTOCOL_BY_HANDLE_PROTOCOL:
 	case EFI_OPEN_PROTOCOL_GET_PROTOCOL: