[PATCH 4.9 09/53] parisc: Skip registering LED when running in QEMU

From: Helge Deller deller@gmx.de

commit b438749044356dd1329c45e9b5a9377b6ea13eb2 upstream.

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+ Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- drivers/parisc/led.c | 3 +++ 1 file changed, 3 insertions(+)

--- a/drivers/parisc/led.c +++ b/drivers/parisc/led.c @@ -568,6 +568,9 @@ int __init register_led_driver(int model 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);