| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.14 12/77] parisc: Skip registering LED when running in QEMU | Date | Thu, 23 May 2019 21:05:30 +0200 |
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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);
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