laforge has uploaded this change for review. ( https://gerrit.osmocom.org/c/osmo-e1d/+/29953 )

Change subject: usb.c: Bail out of e1-tracer doesn't accept set_configuration(2) ......................................................................

usb.c: Bail out of e1-tracer doesn't accept set_configuration(2)

This likely means it's not an e1-tracer after all, or it's an old firmware that doesn't yet expose the e1d-compatible USB configuration.

Related: OS#5734 Change-Id: If5a9bc20084d84885d5d97b4f982e94801612d24 --- M src/usb.c 1 file changed, 7 insertions(+), 2 deletions(-)

git pull ssh://gerrit.osmocom.org:29418/osmo-e1d refs/changes/53/29953/1

diff --git a/src/usb.c b/src/usb.c index dc89bb0..35e1894 100644 --- a/src/usb.c +++ b/src/usb.c @@ -876,8 +876,13 @@ }

/* we have prior knowledge that the e1-tracer firmware configuration 2 is the e1d compatible mode. */ - if (is_tracer) - libusb_set_configuration(devh, 2); + if (is_tracer) { + if (libusb_set_configuration(devh, 2) != LIBUSB_SUCCESS) { + LOGP(DE1D, LOGL_ERROR, "Cannot set configuration 2 of e1-tracer device. Maybe too old firmware?\n"); + libusb_close(devh); + return -EIO; + } + }

INIT_LLIST_HEAD(&intf_data->ctrl_inprogress);