Don't crash when no devices are present

9608ab37 · Bastien Nocera · 73561989 · 9608ab37
Commit 9608ab37 authored Aug 18, 2010 by Bastien Nocera
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Showing with 6 additions and 4 deletions

libfprint/core.c libfprint/core.c +6 -4

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--- a/libfprint/core.c
+++ b/libfprint/core.c
@@ -464,10 +464,12 @@ static struct fp_driver *find_supporting_driver(libusb_device *udev,
 		}
 	} while ((elem = g_slist_next(elem)));

-	fp_dbg("selected driver %s supports USB device %04x:%04x",
-	       best_drv->name, dsc.idVendor, dsc.idProduct);
-	*devtype = best_devtype;
-	*usb_id = best_usb_id;
+	if (best_drv != NULL) {
+		fp_dbg("selected driver %s supports USB device %04x:%04x",
+		       best_drv->name, dsc.idVendor, dsc.idProduct);
+		*devtype = best_devtype;
+		*usb_id = best_usb_id;
+	}

 	return best_drv;
 }