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authorSebastian Andrzej Siewior <bigeasy@linutronix.de>2016-07-20 17:24:55 +0200
committerThomas Gleixner <tglx@linutronix.de>2016-07-22 21:53:18 +0200
commitcd894f149732a06ba4b2ccdc4cb86edf7ff68620 (patch)
tree6c670d6434de49a1d0e535f001a9ff5650ea3bf0 /drivers/leds
parentbdab88e006504cd83fac98705814485cbe3ef5b4 (diff)
leds/trigger/cpu: Move from CPU_STARTING to ONLINE level
There is no need the ledtriger to be called *that* early in the hotplug process (+ with disabled interrupts). As explained by Jacek Anaszewski [0] there is no need for it. Therefore this patch moves it to the ONLINE/PREPARE_DOWN level using the dynamic registration for the id. [0] https://lkml.kernel.org/r/578C92BC.2070603@samsung.com Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Acked-by: Jacek Anaszewski <j.anaszewski@samsung.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: Richard Purdie <rpurdie@rpsys.net> Cc: rt@linutronix.de Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: linux-leds@vger.kernel.org Link: http://lkml.kernel.org/r/1469028295-14702-1-git-send-email-bigeasy@linutronix.de Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'drivers/leds')
-rw-r--r--drivers/leds/trigger/ledtrig-cpu.c16
1 files changed, 8 insertions, 8 deletions
diff --git a/drivers/leds/trigger/ledtrig-cpu.c b/drivers/leds/trigger/ledtrig-cpu.c
index 4a6a182d0a88..22f0634dd3fa 100644
--- a/drivers/leds/trigger/ledtrig-cpu.c
+++ b/drivers/leds/trigger/ledtrig-cpu.c
@@ -92,13 +92,13 @@ static struct syscore_ops ledtrig_cpu_syscore_ops = {
.resume = ledtrig_cpu_syscore_resume,
};
-static int ledtrig_starting_cpu(unsigned int cpu)
+static int ledtrig_online_cpu(unsigned int cpu)
{
ledtrig_cpu(CPU_LED_START);
return 0;
}
-static int ledtrig_dying_cpu(unsigned int cpu)
+static int ledtrig_prepare_down_cpu(unsigned int cpu)
{
ledtrig_cpu(CPU_LED_STOP);
return 0;
@@ -107,6 +107,7 @@ static int ledtrig_dying_cpu(unsigned int cpu)
static int __init ledtrig_cpu_init(void)
{
int cpu;
+ int ret;
/* Supports up to 9999 cpu cores */
BUILD_BUG_ON(CONFIG_NR_CPUS > 9999);
@@ -126,12 +127,11 @@ static int __init ledtrig_cpu_init(void)
register_syscore_ops(&ledtrig_cpu_syscore_ops);
- /*
- * FIXME: Why needs this to happen in the interrupt disabled
- * low level bringup phase of a cpu?
- */
- cpuhp_setup_state(CPUHP_AP_LEDTRIG_STARTING, "AP_LEDTRIG_STARTING",
- ledtrig_starting_cpu, ledtrig_dying_cpu);
+ ret = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "AP_LEDTRIG_STARTING",
+ ledtrig_online_cpu, ledtrig_prepare_down_cpu);
+ if (ret < 0)
+ pr_err("CPU hotplug notifier for ledtrig-cpu could not be registered: %d\n",
+ ret);
pr_info("ledtrig-cpu: registered to indicate activity on CPUs\n");