Date:   Tue, 2 Apr 2019 12:17:08 +0200
From:   Helge Deller <deller@gmx.de>
To:     linux-parisc@vger.kernel.org,
        James Bottomley <James.Bottomley@hansenpartnership.com>,
        John David Anglin <dave.anglin@bell.net>
Subject: [PATCH] parisc: Skip registering LED when running in QEMU
Message-ID: <20190402101708.GA16152@ls3530.dellerweb.de>
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No need to spend CPU cycles when we run on QEMU.

Signed-off-by: Helge Deller <deller@gmx.de>
CC: stable@vger.kernel.org # v4.9+

diff --git a/drivers/parisc/led.c b/drivers/parisc/led.c
index 0c6e8b44b4ed..3ecd33e765ac 100644
=2D-- a/drivers/parisc/led.c
+++ b/drivers/parisc/led.c
@@ -568,6 +569,9 @@ int __init register_led_driver(int model, unsigned lon=
g 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 =3D data_reg;
 		led_func_ptr =3D led_LASI_driver;
 		printk(KERN_INFO "LED display at %lx registered\n", LED_DATA_REG);