lynxis lazus has uploaded this change for review. ( https://gerrit.osmocom.org/c/libosmocore/+/43346?usp=email )

Change subject: usb: osmo_libusb_open_claim_interface: print an error when no device was found ......................................................................

usb: osmo_libusb_open_claim_interface: print an error when no device was found

When no device was found, osmo_libusb_open_claim_interface() was silent and the other had no idea what went wrong.

Change-Id: I59d31f80a9d5b6bf7b33ca80f4387748531b4cce --- M src/usb/osmo_libusb.c 1 file changed, 8 insertions(+), 5 deletions(-)

git pull ssh://gerrit.osmocom.org:29418/libosmocore refs/changes/46/43346/1

diff --git a/src/usb/osmo_libusb.c b/src/usb/osmo_libusb.c index a249d10..e08a607 100644 --- a/src/usb/osmo_libusb.c +++ b/src/usb/osmo_libusb.c @@ -543,14 +543,14 @@ if (rc < 0) { fprintf(stderr, "Cannot open device: %s\n", libusb_error_name(rc)); usb_devh = NULL; - break; + goto out; } rc = libusb_get_configuration(usb_devh, &config); if (rc < 0) { fprintf(stderr, "Cannot get current configuration: %s\n", libusb_error_name(rc)); libusb_close(usb_devh); usb_devh = NULL; - break; + goto out; } if (config != ifm->configuration) { rc = libusb_set_configuration(usb_devh, ifm->configuration); @@ -558,7 +558,7 @@ fprintf(stderr, "Cannot set configuration: %s\n", libusb_error_name(rc)); libusb_close(usb_devh); usb_devh = NULL; - break; + goto out; } } rc = libusb_claim_interface(usb_devh, ifm->interface); @@ -566,7 +566,7 @@ fprintf(stderr, "Cannot claim interface: %s\n", libusb_error_name(rc)); libusb_close(usb_devh); usb_devh = NULL; - break; + goto out; } rc = libusb_set_interface_alt_setting(usb_devh, ifm->interface, ifm->altsetting); if (rc < 0) { @@ -574,11 +574,14 @@ libusb_release_interface(usb_devh, ifm->interface); libusb_close(usb_devh); usb_devh = NULL; - break; + goto out; } } }

+ if (!usb_devh) + fprintf(stderr, "Failed to find a matching usb device\n"); +out: /* unref / free list */ for (dev = list; *dev; dev++) libusb_unref_device(*dev);