efi_loader: Fix some entry/exit points

When switching between EFI context and U-Boot context we need to swap
the register that "gd" resides in.

Some functions slipped through here, with efi_allocate_pool / efi_free_pool
not doing the switch correctly and efi_return_handle switching too often.

Fix them all up to make sure we always have consistent register state.

Signed-off-by: Alexander Graf <agraf@suse.de>

lib/efi_loader/efi_boottime.c

@@ -137,12 +137,20 @@ efi_status_t EFIAPI efi_get_memory_map_ext(unsigned long *memory_map_size,
 static efi_status_t EFIAPI efi_allocate_pool(int pool_type, unsigned long size,
 					     void **buffer)
 {
-	return efi_allocate_pages(0, pool_type, (size + 0xfff) >> 12, (void*)buffer);
+	efi_status_t r;
+
+	EFI_ENTRY("%d, %ld, %p", pool_type, size, buffer);
+	r = efi_allocate_pages(0, pool_type, (size + 0xfff) >> 12, (void*)buffer);
+	return EFI_EXIT(r);
 }
 
 static efi_status_t EFIAPI efi_free_pool(void *buffer)
 {
-	return efi_free_pages((ulong)buffer, 0);
+	efi_status_t r;
+
+	EFI_ENTRY("%p", buffer);
+	r = efi_free_pages((ulong)buffer, 0);
+	return EFI_EXIT(r);
 }
 
 /*
@@ -706,7 +714,6 @@ static efi_status_t EFIAPI efi_handle_protocol(void *handle,
 					       efi_guid_t *protocol,
 					       void **protocol_interface)
 {
-	EFI_ENTRY("%p, %p, %p", handle, protocol, protocol_interface);
 	return efi_open_protocol(handle, protocol, protocol_interface,
 				 NULL, NULL, 0);
 }

lib/efi_loader/efi_image_loader.c

@@ -22,11 +22,8 @@ efi_status_t EFIAPI efi_return_handle(void *handle, efi_guid_t *protocol,
 			void **protocol_interface, void *agent_handle,
 			void *controller_handle, uint32_t attributes)
 {
-	EFI_ENTRY("%p, %p, %p, %p, %p, 0x%x", handle, protocol,
-		  protocol_interface, agent_handle, controller_handle,
-		  attributes);
 	*protocol_interface = handle;
-	return EFI_EXIT(EFI_SUCCESS);
+	return EFI_SUCCESS;
 }
 
 static void efi_loader_relocate(const IMAGE_BASE_RELOCATION *rel,