[U-Boot] [PATCH v4 1/1] efi_loader: write protocol GUID in OpenProtocol

[Heinrich Schuchardt]

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

Cc: Rob Clark <robdcl...@gmail.com>
Signed-off-by: Heinrich Schuchardt <xypron.g...@gmx.de>
---
v4:
        use %pUl format string
        correct indention of output
v3:
        commit message changed
v2:
        fix typo in commit message
---
 include/efi_loader.h          |  8 ++++++++
 lib/efi_loader/efi_boottime.c | 11 +++++++++++
 2 files changed, 19 insertions(+)

diff --git a/include/efi_loader.h b/include/efi_loader.h
index 870854fb61..5b20af808b 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);
 
@@ -64,6 +65,13 @@ const char *__efi_nesting_dec(void);
        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;
 
diff --git a/lib/efi_loader/efi_boottime.c b/lib/efi_loader/efi_boottime.c
index 5aeaeeca75..6af033458b 100644
--- a/lib/efi_loader/efi_boottime.c
+++ b/lib/efi_loader/efi_boottime.c
@@ -112,6 +112,11 @@ static const char *indent_string(int level)
        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++);
@@ -1163,6 +1170,8 @@ static efi_status_t EFIAPI efi_locate_protocol(efi_guid_t 
*protocol,
        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;
 
@@ -1366,6 +1375,8 @@ static efi_status_t EFIAPI efi_open_protocol(
                goto out;
        }
 
+       EFI_PRINT_GUID("protocol", protocol);
+
        switch (attributes) {
        case EFI_OPEN_PROTOCOL_BY_HANDLE_PROTOCOL:
        case EFI_OPEN_PROTOCOL_GET_PROTOCOL:
-- 
2.11.0
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