[PATCH v4 09/11] boot: Don't change the method count after global bootmeths

[Simon Glass]

At present before scanning global bootmeths, the iterator sets the
method count to the index of the first global bootmeth. Now that we
support scanning the global bootmeths multiple times, we must leave this
count alone.

Check against have_global and first_glob_method instead.

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

(no changes since v1)

 boot/bootflow.c      | 18 ++++++++++++++----
 test/boot/bootflow.c |  6 +++---
 2 files changed, 17 insertions(+), 7 deletions(-)

diff --git a/boot/bootflow.c b/boot/bootflow.c
index 1a4cd0e28e8..38b8af916b2 100644
--- a/boot/bootflow.c
+++ b/boot/bootflow.c
@@ -304,9 +304,20 @@ static int iter_incr(struct bootflow_iter *iter)
 	for (iter->cur_method++; iter->cur_method < iter->num_methods;
 	     iter->cur_method++) {
 		/* loop until we find a global bootmeth we haven't used */
-		if (IS_ENABLED(CONFIG_BOOTMETH_GLOBAL) && iter->doing_global &&
-		    !bootmeth_glob_allowed(iter, iter->cur_method))
-			continue;
+		if (IS_ENABLED(CONFIG_BOOTMETH_GLOBAL) && iter->doing_global) {
+			if (!bootmeth_glob_allowed(iter, iter->cur_method))
+				continue;
+
+			iter->method = iter->method_order[iter->cur_method];
+			log_debug("-> next global method '%s'\n",
+				  iter->method->name);
+			return 0;
+		}
+
+		/* at this point we are only considering non-global bootmeths */
+		if (IS_ENABLED(CONFIG_BOOTMETH_GLOBAL) && iter->have_global &&
+		    iter->cur_method >= iter->first_glob_method)
+			break;
 
 		iter->method = iter->method_order[iter->cur_method];
 		return 0;
@@ -317,7 +328,6 @@ static int iter_incr(struct bootflow_iter *iter)
 	 * normal bootdev scan
 	 */
 	if (IS_ENABLED(CONFIG_BOOTMETH_GLOBAL) && global) {
-		iter->num_methods = iter->first_glob_method;
 		iter->doing_global = false;
 
 		/*
diff --git a/test/boot/bootflow.c b/test/boot/bootflow.c
index 8317dee1e20..20297136e3f 100644
--- a/test/boot/bootflow.c
+++ b/test/boot/bootflow.c
@@ -426,7 +426,7 @@ static int bootflow_iter_glob(struct unit_test_state *uts)
 	ut_asserteq(-EPROTONOSUPPORT, bootflow_scan_next(&iter, &bflow));
 
 	/* at this point the global bootmeths are stranded above num_methods */
-	ut_asserteq(2, iter.num_methods);
+	ut_asserteq(3, iter.num_methods);
 	ut_asserteq(2, iter.first_glob_method);
 	ut_assert(!iter.doing_global);
 	ut_assert(iter.have_global);
@@ -493,7 +493,7 @@ static int bootflow_iter_disable(struct unit_test_state *uts)
 	ut_assertok(bootflow_scan_first(NULL, NULL, &iter, 0, &bflow));
 
 	/* at this point the global bootmeths are stranded above num_methods */
-	ut_asserteq(3, iter.num_methods);
+	ut_asserteq(4, iter.num_methods);
 	ut_assert(!iter.doing_global);
 	ut_assert(iter.have_global);
 	ut_asserteq(3, iter.first_glob_method);
@@ -505,7 +505,7 @@ static int bootflow_iter_disable(struct unit_test_state *uts)
 	ut_assert_console_end();
 
 	/* Check that the sandbox bootmeth has been removed */
-	ut_asserteq(2, iter.num_methods);
+	ut_asserteq(3, iter.num_methods);
 
 	for (i = 0; i < iter.num_methods; i++)
 		ut_assert(strcmp("sandbox", iter.method_order[i]->name));
-- 
2.43.0