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| author | Helge Deller <deller@gmx.de> | 2019-04-02 13:17:08 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-05-25 19:25:18 +0300 |
| commit | c14ece1965a0f9e4503d98edf78468c326174321 (patch) | |
| tree | c9b1ae7690a64550089a86121116902931352fe9 | |
| parent | 18387128ad43988392dcd89e38f7d2b80a0b742d (diff) | |
| download | linux-c14ece1965a0f9e4503d98edf78468c326174321.tar.xz | |
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: Helge Deller <deller@gmx.de>
CC: stable@vger.kernel.org # v4.9+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/parisc/led.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/parisc/led.c b/drivers/parisc/led.c index ff1a332d76e4..665e5de909b0 100644 --- a/drivers/parisc/led.c +++ b/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); |