Author: jmcneill
Date: Mon Oct 24 22:35:12 2016
New Revision: 307888
URL: https://svnweb.freebsd.org/changeset/base/307888
Log:
Defer cpufreq updates from intr handler to the taskqueue_thread queue.
Modified:
head/sys/arm/allwinner/aw_thermal.c
Modified: head/sys/arm/allwinner/aw_thermal.c
==============================================================================
--- head/sys/arm/allwinner/aw_thermal.c Mon Oct 24 22:11:33 2016
(r307887)
+++ head/sys/arm/allwinner/aw_thermal.c Mon Oct 24 22:35:12 2016
(r307888)
@@ -42,6 +42,7 @@ __FBSDID("$FreeBSD$");
#include <sys/reboot.h>
#include <sys/module.h>
#include <sys/cpu.h>
+#include <sys/taskqueue.h>
#include <machine/bus.h>
#include <dev/ofw/ofw_bus.h>
@@ -249,6 +250,7 @@ struct aw_thermal_softc {
struct resource *res[2];
struct aw_thermal_config *conf;
+ struct task cf_task;
int throttle;
int min_freq;
struct cf_level levels[MAX_CF_LEVELS];
@@ -390,6 +392,16 @@ aw_thermal_throttle(struct aw_thermal_so
}
static void
+aw_thermal_cf_task(void *arg, int pending)
+{
+ struct aw_thermal_softc *sc;
+
+ sc = arg;
+
+ aw_thermal_throttle(sc, 1);
+}
+
+static void
aw_thermal_cf_pre_change(void *arg, const struct cf_level *level, int *status)
{
struct aw_thermal_softc *sc;
@@ -430,7 +442,7 @@ aw_thermal_intr(void *arg)
}
if ((ints & ALARM_INT_ALL) != 0)
- aw_thermal_throttle(sc, 1);
+ taskqueue_enqueue(taskqueue_thread, &sc->cf_task);
}
static int
@@ -461,6 +473,7 @@ aw_thermal_attach(device_t dev)
ih = NULL;
sc->conf = THS_CONF(dev);
+ TASK_INIT(&sc->cf_task, 0, aw_thermal_cf_task, sc);
if (bus_alloc_resources(dev, aw_thermal_spec, sc->res) != 0) {
device_printf(dev, "cannot allocate resources for device\n");
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