This patch fixes the circular locking dependency warnings in iso.c, caused by A->B/B->A type lock ordering with sk and hdev. The first commit fixes the warning caused by iso_listen_bis, by releasing sk lock before entering the function and acquiring hdev lock. The second commit fixes the warning caused by iso_conn_big_sync. This reworks iso_sock_recvmsg, since it contains multiple function calls that need sk lock to be released: The socket needs to be kept alive with sock_hold before being released. To avoid multiple hold/release/lock/put calls, the socket is grabbed and locked at the beginning of the switch, and it is released and ungrabbed at the end, with release/lock calls when necessary in the switch. Iulia Tanasescu (2): Bluetooth: iso: Fix circular lock in iso_listen_bis Bluetooth: iso: Fix circular lock in iso_conn_big_sync net/bluetooth/iso.c | 48 ++++++++++++++++++++++++++++++++++++--------- 1 file changed, 39 insertions(+), 9 deletions(-) base-commit: 269f7b219173ffbb01121243c55cef8a5503593b -- 2.43.0
