[PATCH v4 1/4] boot: Improve comments related to global bootmeths

[Simon Glass]

Add a few comments about global bootmeths and first_glob_method

Signed-off-by: Simon Glass <sjg at chromium.org>
Reviewed-by: Heinrich Schuchardt <xypron.glpk at gmx.de>
---

(no changes since v3)

Changes in v3:
- Drop the spacing changes

 boot/bootflow.c        | 1 +
 boot/bootmeth-uclass.c | 1 +
 include/bootflow.h     | 3 ++-
 test/boot/bootflow.c   | 2 +-
 4 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/boot/bootflow.c b/boot/bootflow.c
index d79f303486d..15df7069209 100644
--- a/boot/bootflow.c
+++ b/boot/bootflow.c
@@ -344,6 +344,7 @@ static int bootflow_check(struct bootflow_iter *iter, struct bootflow *bflow)
 	struct udevice *dev;
 	int ret;
 
+	/* handle global bootmeths if needed */
 	if (IS_ENABLED(CONFIG_BOOTMETH_GLOBAL) && iter->doing_global) {
 		bootflow_iter_set_dev(iter, NULL, 0);
 		ret = bootmeth_get_bootflow(iter->method, bflow);
diff --git a/boot/bootmeth-uclass.c b/boot/bootmeth-uclass.c
index 188f6ea1895..bb2dd8447cf 100644
--- a/boot/bootmeth-uclass.c
+++ b/boot/bootmeth-uclass.c
@@ -204,6 +204,7 @@ int bootmeth_setup_iter_order(struct bootflow_iter *iter, bool include_global)
 		goto err_order;
 	}
 
+	/* start with the global bootmeths */
 	if (IS_ENABLED(CONFIG_BOOTMETH_GLOBAL) && include_global &&
 	    iter->first_glob_method != -1 && iter->first_glob_method != count) {
 		iter->cur_method = iter->first_glob_method;
diff --git a/include/bootflow.h b/include/bootflow.h
index 32422067723..2ef6eb25cf5 100644
--- a/include/bootflow.h
+++ b/include/bootflow.h
@@ -250,7 +250,8 @@ enum bootflow_meth_flags_t {
  * @cur_label: Current label being processed
  * @num_methods: Number of bootmeth devices in @method_order
  * @cur_method: Current method number, an index into @method_order
- * @first_glob_method: First global method, if any, else -1
+ * @first_glob_method: Index of first global method within @method_order[], if
+ * any, else -1
  * @cur_prio: Current priority being scanned
  * @method_order: List of bootmeth devices to use, in order. The normal methods
  *	appear first, then the global ones, if any
diff --git a/test/boot/bootflow.c b/test/boot/bootflow.c
index 8de5a310add..7cd83dc7443 100644
--- a/test/boot/bootflow.c
+++ b/test/boot/bootflow.c
@@ -401,7 +401,7 @@ static int bootflow_system(struct unit_test_state *uts)
 	ut_assertok(device_probe(dev));
 	sandbox_set_fake_efi_mgr_dev(dev, true);
 
-	/* We should get a single 'bootmgr' method right at the end */
+	/* We should get a single 'bootmgr' method at the start */
 	bootstd_clear_glob();
 	ut_assertok(run_command("bootflow scan -lH", 0));
 	ut_assert_skip_to_line(
-- 
2.43.0