if ((ret = sr_usb_open(drvc->sr_ctx->libusb_ctx, usb)) < 0)
return SR_ERR;
- /* Detach kernel drivers which grabbed this device (if any). */
if (libusb_kernel_driver_active(usb->devhdl, 0) == 1) {
ret = libusb_detach_kernel_driver(usb->devhdl, 0);
if (ret < 0) {
devc->detached_kernel_driver = 1;
}
- /* Claim interface 0. */
if ((ret = libusb_claim_interface(usb->devhdl, 0)) < 0) {
sr_err("Failed to claim interface 0: %s.",
libusb_error_name(ret));
usb = sdi->conn;
devc = sdi->priv;
+ if (!usb->devhdl)
+ return SR_OK;
+
if ((ret = libusb_release_interface(usb->devhdl, 0)))
sr_err("Failed to release interface 0: %s.\n", libusb_error_name(ret));
return (ret == 0) ? SR_OK : SR_ERR;
}
-static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
- const struct sr_channel_group *cg)
+static int config_get(uint32_t key, GVariant **data,
+ const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
{
struct dev_context *devc = sdi->priv;
return sr_sw_limits_config_get(&devc->sw_limits, key, data);
}
-static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
- const struct sr_channel_group *cg)
+static int config_set(uint32_t key, GVariant *data,
+ const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
{
struct dev_context *devc;
return sr_sw_limits_config_set(&devc->sw_limits, key, data);
}
-static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
- const struct sr_channel_group *cg)
+static int config_list(uint32_t key, GVariant **data,
+ const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
{
return STD_CONFIG_LIST(key, data, sdi, cg, scanopts, drvopts, devopts);
}