parisc: Skip registering LED when running in QEMU

commit b438749044356dd1329c45e9b5a9377b6ea13eb2 upstream.

No need to spend CPU cycles when we run on QEMU.
Signed-off-by: NHelge Deller <deller@gmx.de>
CC: stable@vger.kernel.org # v4.9+
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>

drivers/parisc/led.c

@@ -568,6 +568,9 @@ int __init register_led_driver(int model, unsigned long cmd_reg, unsigned long d
 		break;
 
 	case DISPLAY_MODEL_LASI:
+		/* Skip to register LED in QEMU */
+		if (running_on_qemu)
+			return 1;
 		LED_DATA_REG = data_reg;
 		led_func_ptr = led_LASI_driver;
 		printk(KERN_INFO "LED display at %lx registered\n", LED_DATA_REG);