Hi Sebastian, > Mart reported a deadlock in -RT in the call path: > hci_send_monitor_ctrl_event() -> hci_send_to_channel() > > because both functions acquire the same read lock hci_sk_list.lock. This > is also a mainline issue because the qrwlock implementation is writer > fair (the traditional rwlock implementation is reader biased). > > To avoid the deadlock there is now __hci_send_to_channel() which expects > the readlock to be held. > > Cc: Marcel Holtmann <[email protected]> > Cc: Johan Hedberg <[email protected]> > Fixes: 38ceaa00d02d ("Bluetooth: Add support for sending MGMT commands and > events to monitor") > Reported-by: Mart van de Wege <[email protected]> > Signed-off-by: Sebastian Andrzej Siewior <[email protected]> > --- > net/bluetooth/hci_sock.c | 17 +++++++++++------ > 1 file changed, 11 insertions(+), 6 deletions(-)
patch has been applied to bluetooth-next tree. Regards Marcel
