lascar-el-usb: lascar_scan(): Fix USB device list leak

[libsigrok.git] / src / hardware / lascar-el-usb / protocol.c

diff --git a/src/hardware/lascar-el-usb/protocol.c b/src/hardware/lascar-el-usb/protocol.c
index e4fae68f5720d4df39e9fbac0d3001d94d43274a..f7b053f3bf19f45c7f1fd91c53b6181f5d75ec69 100644 (file)
--- a/src/hardware/lascar-el-usb/protocol.c
+++ b/src/hardware/lascar-el-usb/protocol.c
@@ -354,12 +354,16 @@ SR_PRIV struct sr_dev_inst *lascar_scan(int bus, int address)
        struct libusb_device **devlist;
        libusb_device_handle *dev_hdl;
        int dummy, i;
+       int ret;
        unsigned char config[MAX_CONFIGBLOCK_SIZE];
 
        drvc = di->context;
        sdi = NULL;
 
-       libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
+       ret = libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
+       if (ret < 0)
+               return NULL;
+
        for (i = 0; devlist[i]; i++) {
                if (libusb_get_bus_number(devlist[i]) != bus ||
                                libusb_get_device_address(devlist[i]) != address)
@@ -374,6 +378,7 @@ SR_PRIV struct sr_dev_inst *lascar_scan(int bus, int address)
                libusb_close(dev_hdl);
                sdi = lascar_identify(config);
        }
+       libusb_free_device_list(devlist, 1);
 
        return sdi;
 }