summaryrefslogtreecommitdiffstats
path: root/arch/arm/common
diff options
context:
space:
mode:
authorSebastian Andrzej Siewior <bigeasy@linutronix.de>2016-11-17 19:35:35 +0100
committerThomas Gleixner <tglx@linutronix.de>2016-11-22 23:34:41 +0100
commita3c9b14f6f151ee4c2a119fab14f9a60d1684d60 (patch)
treebad0878e239fbe51d03121f0397278292fde9228 /arch/arm/common
parent31eff2434db542763a00074a8368d7bd78d14ea1 (diff)
downloadlinux-a3c9b14f6f151ee4c2a119fab14f9a60d1684d60.tar.bz2
arm/bL_switcher: Convert to hotplug state machine
Install the callbacks via the state machine. Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Cc: rt@linuxtronix.de Cc: linux-arm-kernel@lists.infradead.org Cc: Russell King <linux@armlinux.org.uk> Link: http://lkml.kernel.org/r/20161117183541.8588-15-bigeasy@linutronix.de Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/arm/common')
-rw-r--r--arch/arm/common/bL_switcher.c34
1 files changed, 20 insertions, 14 deletions
diff --git a/arch/arm/common/bL_switcher.c b/arch/arm/common/bL_switcher.c
index 37dc0fe1093f..46730017b3c5 100644
--- a/arch/arm/common/bL_switcher.c
+++ b/arch/arm/common/bL_switcher.c
@@ -757,19 +757,18 @@ EXPORT_SYMBOL_GPL(bL_switcher_put_enabled);
* while the switcher is active.
* We're just not ready to deal with that given the trickery involved.
*/
-static int bL_switcher_hotplug_callback(struct notifier_block *nfb,
- unsigned long action, void *hcpu)
+static int bL_switcher_cpu_pre(unsigned int cpu)
{
- if (bL_switcher_active) {
- int pairing = bL_switcher_cpu_pairing[(unsigned long)hcpu];
- switch (action & 0xf) {
- case CPU_UP_PREPARE:
- case CPU_DOWN_PREPARE:
- if (pairing == -1)
- return NOTIFY_BAD;
- }
- }
- return NOTIFY_DONE;
+ int pairing;
+
+ if (!bL_switcher_active)
+ return 0;
+
+ pairing = bL_switcher_cpu_pairing[cpu];
+
+ if (pairing == -1)
+ return -EINVAL;
+ return 0;
}
static bool no_bL_switcher;
@@ -782,8 +781,15 @@ static int __init bL_switcher_init(void)
if (!mcpm_is_available())
return -ENODEV;
- cpu_notifier(bL_switcher_hotplug_callback, 0);
-
+ cpuhp_setup_state_nocalls(CPUHP_ARM_BL_PREPARE, "arm/bl:prepare",
+ bL_switcher_cpu_pre, NULL);
+ ret = cpuhp_setup_state_nocalls(CPUHP_AP_ONLINE_DYN, "arm/bl:predown",
+ NULL, bL_switcher_cpu_pre);
+ if (ret < 0) {
+ cpuhp_remove_state_nocalls(CPUHP_ARM_BL_PREPARE);
+ pr_err("bL_switcher: Failed to allocate a hotplug state\n");
+ return ret;
+ }
if (!no_bL_switcher) {
ret = bL_switcher_enable();
if (ret)