[PATCH v2 1/3] efi: Add debugging to efi_set_bootdev()

[Simon Glass]

The operation of this function can be confusing. Add some debugging so
we can see what it is doing and when it is called.

Also drop the preprocessor usage.

Signed-off-by: Simon Glass <sjg at chromium.org>
---

Changes in v2:
- Update one of the debug messages

 cmd/bootefi.c | 32 +++++++++++++++++++++-----------
 1 file changed, 21 insertions(+), 11 deletions(-)

diff --git a/cmd/bootefi.c b/cmd/bootefi.c
index 3a8b2b60618..94d18ca73fa 100644
--- a/cmd/bootefi.c
+++ b/cmd/bootefi.c
@@ -65,6 +65,9 @@ void efi_set_bootdev(const char *dev, const char *devnr, const char *path,
 	struct efi_device_path *device, *image;
 	efi_status_t ret;
 
+	log_debug("dev=%s, devnr=%s, path=%s, buffer=%p, size=%zx\n", dev,
+		  devnr, path, buffer, buffer_size);
+
 	/* Forget overwritten image */
 	if (buffer + buffer_size >= image_addr &&
 	    image_addr + image_size >= buffer)
@@ -72,18 +75,19 @@ void efi_set_bootdev(const char *dev, const char *devnr, const char *path,
 
 	/* Remember only PE-COFF and FIT images */
 	if (efi_check_pe(buffer, buffer_size, NULL) != EFI_SUCCESS) {
-#ifdef CONFIG_FIT
-		if (fit_check_format(buffer, IMAGE_SIZE_INVAL))
+		if (IS_ENABLED(CONFIG_FIT) &&
+		    !fit_check_format(buffer, IMAGE_SIZE_INVAL)) {
+			/*
+			 * FIT images of type EFI_OS are started via command
+			 * bootm. We should not use their boot device with the
+			 * bootefi command.
+			 */
+			buffer = 0;
+			buffer_size = 0;
+		} else {
+			log_debug("- not remembering image\n");
 			return;
-		/*
-		 * FIT images of type EFI_OS are started via command bootm.
-		 * We should not use their boot device with the bootefi command.
-		 */
-		buffer = 0;
-		buffer_size = 0;
-#else
-		return;
-#endif
+		}
 	}
 
 	/* efi_set_bootdev() is typically called repeatedly, recover memory */
@@ -103,7 +107,11 @@ void efi_set_bootdev(const char *dev, const char *devnr, const char *path,
 			efi_free_pool(image_tmp);
 		}
 		bootefi_image_path = image;
+		log_debug("- recorded device %ls\n", efi_dp_str(device));
+		if (image)
+			log_debug("- and image %ls\n", efi_dp_str(image));
 	} else {
+		log_debug("- efi_dp_from_name() failed, err=%lx\n", ret);
 		efi_clear_bootdev();
 	}
 }
@@ -451,6 +459,7 @@ efi_status_t efi_run_image(void *source_buffer, efi_uintn_t source_size)
 	u16 *load_options;
 
 	if (!bootefi_device_path || !bootefi_image_path) {
+		log_debug("Not loaded from disk\n");
 		/*
 		 * Special case for efi payload not loaded from disk,
 		 * such as 'bootefi hello' or for example payload
@@ -476,6 +485,7 @@ efi_status_t efi_run_image(void *source_buffer, efi_uintn_t source_size)
 		file_path = efi_dp_append(bootefi_device_path,
 					  bootefi_image_path);
 		msg_path = bootefi_image_path;
+		log_debug("Loaded from disk\n");
 	}
 
 	log_info("Booting %pD\n", msg_path);
-- 
2.35.0.rc2.247.g8bbb082509-goog