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Code Issues Releases Activity

don't do mutex locking around kthread_create() call.

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Reported by:	Maxim Maximov <mcsi__at__mcsi.pp.ru>
This commit is contained in:
Hajimu UMEMOTO 2005-08-04 18:34:26 +00:00
parent 6da3131abd
commit fa4679950b
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=148703
1 changed files with 16 additions and 4 deletions
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20
sys/dev/acpica/acpi_thermal.c
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@ -112,6 +112,7 @@ struct acpi_tz_softc {
/* passive cooling */
struct proc *tz_cooling_proc;
int tz_cooling_proc_running;
int tz_cooling_enabled;
int tz_cooling_active;
int tz_cooling_updated;
@ -198,6 +199,7 @@ acpi_tz_attach(device_t dev)
sc->tz_active = TZ_ACTIVE_NONE;
sc->tz_thflags = TZ_THFLAG_NONE;
sc->tz_cooling_proc = NULL;
sc->tz_cooling_proc_running = FALSE;
sc->tz_cooling_active = FALSE;
sc->tz_cooling_updated = FALSE;
@ -994,8 +996,9 @@ acpi_tz_cooling_thread(void *arg)
acpi_tz_cpufreq_restore(sc);
sc->tz_cooling_active = FALSE;
}
ACPI_LOCK(thermal);
sc->tz_cooling_proc = NULL;
ACPI_LOCK(thermal);
sc->tz_cooling_proc_running = FALSE;
ACPI_UNLOCK(thermal);
kthread_exit(0);
}
@ -1019,16 +1022,25 @@ acpi_tz_cooling_thread_start(struct acpi_tz_softc *sc)
int error;
char name[16];
error = 0;
ACPI_LOCK(thermal);
if (sc->tz_cooling_proc_running) {
ACPI_UNLOCK(thermal);
return (0);
}
sc->tz_cooling_proc_running = TRUE;
ACPI_UNLOCK(thermal);
error = 0;
if (sc->tz_cooling_proc == NULL) {
snprintf(name, sizeof(name), "acpi_cooling%d",
device_get_unit(sc->tz_dev));
error = kthread_create(acpi_tz_cooling_thread, sc,
&sc->tz_cooling_proc, RFHIGHPID, 0, name);
if (error != 0)
if (error != 0) {
device_printf(sc->tz_dev, "could not create thread - %d", error);
ACPI_LOCK(thermal);
sc->tz_cooling_proc_running = FALSE;
ACPI_UNLOCK(thermal);
}
}
ACPI_UNLOCK(thermal);
return (error);
}