The branch main has been updated by hselasky: URL: https://cgit.FreeBSD.org/src/commit/?id=67cbbf19595da4565d3c8603030fdb8d33ed571e
commit 67cbbf19595da4565d3c8603030fdb8d33ed571e Author: Hans Petter Selasky <[email protected]> AuthorDate: 2021-12-07 10:28:21 +0000 Commit: Hans Petter Selasky <[email protected]> CommitDate: 2021-12-07 10:39:49 +0000 ng_ubt(4): Introduce net.bluetooth.usb_isoc_enable loader tunable to disable isochronous transfers. If users want to disable isochronous transfers, which cause high frequency periodic interrupts from the USB host controller, then net.bluetooth.usb_isoc_enable can be set to zero, either as a sysctl(8) or as a loader.conf(5) tunable. Differential Revision: https://reviews.freebsd.org/D33282 Submitted by: [email protected] PR: 238235 MFC after: 1 week Sponsored by: NVIDIA Networking --- sys/netgraph/bluetooth/drivers/ubt/ng_ubt.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/sys/netgraph/bluetooth/drivers/ubt/ng_ubt.c b/sys/netgraph/bluetooth/drivers/ubt/ng_ubt.c index a79a8cd48509..c3820fc872af 100644 --- a/sys/netgraph/bluetooth/drivers/ubt/ng_ubt.c +++ b/sys/netgraph/bluetooth/drivers/ubt/ng_ubt.c @@ -152,6 +152,11 @@ static ng_disconnect_t ng_ubt_disconnect; static ng_rcvmsg_t ng_ubt_rcvmsg; static ng_rcvdata_t ng_ubt_rcvdata; +static int ng_usb_isoc_enable = 1; + +SYSCTL_INT(_net_bluetooth, OID_AUTO, usb_isoc_enable, CTLFLAG_RDTUN | CTLFLAG_MPSAFE, + &ng_usb_isoc_enable, 0, "enable isochronous transfers"); + /* Queue length */ static const struct ng_parse_struct_field ng_ubt_node_qlen_type_fields[] = { @@ -742,8 +747,9 @@ ubt_attach(device_t dev) } /* Setup transfers for both interfaces */ - if (usbd_transfer_setup(uaa->device, iface_index, sc->sc_xfer, - ubt_config, UBT_N_TRANSFER, sc, &sc->sc_if_mtx)) { + if (usbd_transfer_setup(uaa->device, iface_index, sc->sc_xfer, ubt_config, + ng_usb_isoc_enable ? UBT_N_TRANSFER : UBT_IF_1_ISOC_DT_RD1, + sc, &sc->sc_if_mtx)) { UBT_ALERT(sc, "could not allocate transfers\n"); goto detach; }
