From: Luiz Augusto von Dentz Date: Fri, 27 Jun 2025 15:18:29 +0000 (-0400) Subject: Bluetooth: ISO: Don't initiate CIS connections if there are no buffers X-Git-Tag: v6.18-rc1~132^2~26^2~18 X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=d79c7d01f1c8bcf9a48337c8960d618fbe31fc0c;p=thirdparty%2Flinux.git Bluetooth: ISO: Don't initiate CIS connections if there are no buffers If the controller has no buffers left return -ENOBUFF to indicate that iso_cnt might be out of sync. Signed-off-by: Luiz Augusto von Dentz --- diff --git a/net/bluetooth/iso.c b/net/bluetooth/iso.c index 5ce823ca3aaf4..ac6e83313b9b6 100644 --- a/net/bluetooth/iso.c +++ b/net/bluetooth/iso.c @@ -458,6 +458,13 @@ static int iso_connect_cis(struct sock *sk) goto unlock; } + /* Check if there are available buffers for output/TX. */ + if (iso_pi(sk)->qos.ucast.out.sdu && !hci_iso_count(hdev) && + (hdev->iso_pkts && !hdev->iso_cnt)) { + err = -ENOBUFS; + goto unlock; + } + /* Just bind if DEFER_SETUP has been set */ if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) { hcon = hci_bind_cis(hdev, &iso_pi(sk)->dst,