greybus: loopback: Print error on data mismatch

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Bryan O'Donoghue <bryan.odnoghue@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

drivers/staging/greybus/loopback.c

@@ -287,8 +287,10 @@ static int gb_loopback_transfer(struct gb_loopback *gb, u32 len)
 	if (retval)
 		goto gb_error;
 
-	if (memcmp(request->data, response->data, len))
+	if (memcmp(request->data, response->data, len)) {
+		pr_info("%s: Loopback Data doesn't match\n", __func__);
 		retval = -EREMOTEIO;
+	}
 
 gb_error:
 	kfree(request);