hardware: Call libusb_error_name() in all USB-related error messages

[libsigrok.git] / hardware / victor-dmm / api.c

diff --git a/hardware/victor-dmm/api.c b/hardware/victor-dmm/api.c
index a389b0794799932f62ee0aeb803ff286b603faa0..46e8c1d5b35c61124b5dd42b03bbf334928f3c44 100644 (file)
--- a/hardware/victor-dmm/api.c
+++ b/hardware/victor-dmm/api.c
@@ -194,8 +194,9 @@ static int hw_dev_open(struct sr_dev_inst *sdi)
        /* The device reports as HID class, so the kernel would have
         * claimed it. */
        if (libusb_kernel_driver_active(devc->usb->devhdl, 0) == 1) {
-               if (libusb_detach_kernel_driver(devc->usb->devhdl, 0) < 0) {
-                       sr_err("Failed to detach kernel driver.");
+               if ((ret = libusb_detach_kernel_driver(devc->usb->devhdl, 0)) < 0) {
+                       sr_err("Failed to detach kernel driver: %s.",
+                              libusb_error_name(ret));
                        return SR_ERR;
                }
        }