samples: Bluetooth: Handle shutdown of iso broadcast benchmark

The sample did not properly handle ending the broadcast and setting
it up for a new broadcast, due to missing wait for sem_big_term and
a bad check in iso_disconnected.

Furthermore if any did not work when setting up the BIG,
the error handling did not properly clean up for a retry.

(cherry picked from commit 4d60f0a)

Original-Signed-off-by: Emil Gydesen <emil.gydesen@nordicsemi.no>
GitOrigin-RevId: 4d60f0a
Cr-Build-Id: 8726634528781615073
Cr-Build-Url: https://cr-buildbucket.appspot.com/build/8726634528781615073
Copybot-Job-Name: zephyr-main-copybot-downstream
Change-Id: I86f7258145fa80a6330ba9b8cf73c0b529f2d030
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/zephyr/+/6145195
Bot-Commit: ChromeOS Prod (Robot) <chromeos-ci-prod@chromeos-bot.iam.gserviceaccount.com>
Commit-Queue: ChromeOS Prod (Robot) <chromeos-ci-prod@chromeos-bot.iam.gserviceaccount.com>
Tested-by: ChromeOS Prod (Robot) <chromeos-ci-prod@chromeos-bot.iam.gserviceaccount.com>

samples/bluetooth/iso_broadcast_benchmark/src/broadcaster.c

@@ -12,6 +12,7 @@
 #include <zephyr/console/console.h>
 #include <zephyr/bluetooth/bluetooth.h>
 #include <zephyr/bluetooth/iso.h>
+#include <zephyr/kernel.h>
 #include <zephyr/sys/byteorder.h>
 
 #include <zephyr/logging/log.h>
@@ -86,7 +87,7 @@ static void iso_disconnected(struct bt_iso_chan *chan, uint8_t reason)
 	       chan, reason);
 
 	connected_bis--;
-	if (connected_bis == big_create_param.num_bis) {
+	if (connected_bis == 0) {
 		k_sem_give(&sem_big_term);
 	}
 }
@@ -681,7 +682,7 @@ static int create_big(struct bt_le_ext_adv **adv, struct bt_iso_big **big)
 	err = bt_le_ext_adv_set_data(*adv, ad, ARRAY_SIZE(ad), NULL, 0);
 	if (err) {
 		LOG_ERR("Failed to set advertising data (err %d)", err);
-		return 0;
+		return err;
 	}
 
 	LOG_INF("Setting Periodic Advertising parameters");
@@ -739,32 +740,41 @@ static int delete_big(struct bt_le_ext_adv **adv, struct bt_iso_big **big)
 {
 	int err;
 
-	err = bt_iso_big_terminate(*big);
-	if (err != 0) {
-		LOG_ERR("Failed to terminate BIG (err %d)", err);
-		return err;
+	if (*big != NULL) {
+		err = bt_iso_big_terminate(*big);
+		if (err != 0) {
+			LOG_ERR("Failed to terminate BIG (err %d)", err);
+			return err;
+		}
+		err = k_sem_take(&sem_big_term, K_FOREVER);
+		if (err != 0) {
+			LOG_ERR("failed to take sem_big_term (err %d)", err);
+			return err;
+		}
+		*big = NULL;
 	}
-	*big = NULL;
 
-	err = bt_le_per_adv_stop(*adv);
-	if (err != 0) {
-		LOG_ERR("Failed to stop periodic advertising (err %d)", err);
-		return err;
-	}
+	if (*adv != NULL) {
+		err = bt_le_per_adv_stop(*adv);
+		if (err != 0) {
+			LOG_ERR("Failed to stop periodic advertising (err %d)", err);
+			return err;
+		}
 
-	err = bt_le_ext_adv_stop(*adv);
-	if (err != 0) {
-		LOG_ERR("Failed to stop advertising (err %d)", err);
-		return err;
-	}
+		err = bt_le_ext_adv_stop(*adv);
+		if (err != 0) {
+			LOG_ERR("Failed to stop advertising (err %d)", err);
+			return err;
+		}
 
-	err = bt_le_ext_adv_delete(*adv);
-	if (err != 0) {
-		LOG_ERR("Failed to delete advertiser (err %d)", err);
-		return err;
-	}
+		err = bt_le_ext_adv_delete(*adv);
+		if (err != 0) {
+			LOG_ERR("Failed to delete advertiser (err %d)", err);
+			return err;
+		}
 
-	*adv = NULL;
+		*adv = NULL;
+	}
 
 	return 0;
 }
@@ -810,7 +820,15 @@ int test_run_broadcaster(void)
 
 	err = create_big(&adv, &big);
 	if (err) {
+		int del_err;
+
 		LOG_ERR("Could not create BIG: %d", err);
+
+		del_err = delete_big(&adv, &big);
+		if (del_err) {
+			LOG_ERR("Could not delete BIG: %d", del_err);
+		}
+
 		return err;
 	}