USB: legotower: fix logical error in recent commit

Commit d9f0d82 ("USB: legousbtower: use usb_control_msg_recv()")
contained an elementary logical error.  The check of the return code
from the new usb_control_msg_recv() function was inverted.

Reported-and-tested-by: [email protected]
Signed-off-by: Alan Stern <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Fixes: d9f0d82 ("USB: legousbtower: use usb_control_msg_recv()")
Cc: stable <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

Author: AlanStern

drivers/usb/misc/legousbtower.c

@@ -797,7 +797,7 @@ static int tower_probe(struct usb_interface *interface, const struct usb_device_
 				      &get_version_reply,
 				      sizeof(get_version_reply),
 				      1000, GFP_KERNEL);
-	if (!result) {
+	if (result) {
 		dev_err(idev, "get version request failed: %d\n", result);
 		retval = result;
 		goto error;