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From: Luiz Augusto von Dentz <luiz.dentz@gmail.com>
To: linux-bluetooth@vger.kernel.org
Subject: [PATCH BlueZ v4 2/4] shared/bap: Make bt_bap_select fallback in case of no channel allocation
Date: Thu, 11 Apr 2024 16:03:03 -0400
Message-ID: <20240411200305.183703-2-luiz.dentz@gmail.com>
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From: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>

If channel allocation could not be matched attempt to call .select
without a channel allocation as the device might require a different
matching algorithm.

Fixes: https://github.com/bluez/bluez/issues/793
---
 src/shared/bap.c | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/src/shared/bap.c b/src/shared/bap.c
index b452461ac715..cc1fa1ffbe32 100644
--- a/src/shared/bap.c
+++ b/src/shared/bap.c
@@ -5116,6 +5116,7 @@ int bt_bap_select(struct bt_bap_pac *lpac, struct bt_bap_pac *rpac,
 			void *user_data)
 {
 	const struct queue_entry *lchan, *rchan;
+	int selected = 0;
 
 	if (!lpac || !rpac || !func)
 		return -EINVAL;
@@ -5158,8 +5159,7 @@ int bt_bap_select(struct bt_bap_pac *lpac, struct bt_bap_pac *rpac,
 						rc->location, &rpac->qos,
 						func, user_data,
 						lpac->user_data);
-			if (count)
-				(*count)++;
+			selected++;
 
 			/* Check if there are any channels left to select */
 			map.count &= ~(map.count & rc->count);
@@ -5175,6 +5175,16 @@ int bt_bap_select(struct bt_bap_pac *lpac, struct bt_bap_pac *rpac,
 		}
 	}
 
+	/* Fallback to no channel allocation since none could be matched. */
+	if (!selected) {
+		lpac->ops->select(lpac, rpac, 0, &rpac->qos, func, user_data,
+					lpac->user_data);
+		selected++;
+	}
+
+	if (count)
+		*count += selected;
+
 	return 0;
 }
 
-- 
2.44.0