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usb: Match device by VID/PID without path/addr if it is unique 

If there's only a single device with matching VID/PID attached,
we don't need to insist that either the path or the address of the
device matches.  Those are only needed to disambiguate multiple
devices with identical VID/PID.

Change-Id: I2ef245a56dfcf22758a0216b86d2a5c602ee5588
This commit is contained in:
Harald Welte 2022-03-03 17:24:41 +01:00
parent 28b404fb71
commit ef872cb7ad
1 changed files with 2 additions and 1 deletions
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3
src/usb/osmo_libusb.c
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@ -537,7 +537,8 @@ libusb_device_handle *osmo_libusb_open_claim_interface(void *ctx, libusb_context
addr = libusb_get_device_address(*dev);
path = osmo_libusb_dev_get_path_buf(pathbuf, sizeof(pathbuf), *dev);
if ((ifm->addr && addr == ifm->addr) ||
(strlen(ifm->path) && !strcmp(path, ifm->path))) {
(strlen(ifm->path) && !strcmp(path, ifm->path)) ||
(!ifm->addr && !strlen(ifm->path) && !list[1] /* only one device */)) {
rc = libusb_open(*dev, &usb_devh);
if (rc < 0) {
fprintf(stderr, "Cannot open device: %s\n", libusb_error_name(rc));