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initialize only ACPI_BUFFER to avoid race condition with passive

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cooling thread which refers psv, tc1, tc2 and tsp.  The previous
code made the period where sc->tz_zone.tsp was zero, and it caused
panic at msleep().

Reported by:	keramida
Tested by:	keramida
This commit is contained in:
Hajimu UMEMOTO 2005-08-25 10:50:36 +00:00
parent 849aee62b2
commit 9b96aa9ad7
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=149449
1 changed files with 8 additions and 1 deletions
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9
sys/dev/acpica/acpi_thermal.c
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@ -347,7 +347,14 @@ acpi_tz_establish(struct acpi_tz_softc *sc)
AcpiOsFree(sc->tz_zone.al[i].Pointer);
if (sc->tz_zone.psl.Pointer != NULL)
AcpiOsFree(sc->tz_zone.psl.Pointer);
bzero(&sc->tz_zone, sizeof(sc->tz_zone));
/*
* XXX: We initialize only ACPI_BUFFER to avoid race condition
* with passive cooling thread which refers psv, tc1, tc2 and tsp.
*/
bzero(sc->tz_zone.ac, sizeof(sc->tz_zone.ac));
bzero(sc->tz_zone.al, sizeof(sc->tz_zone.al));
bzero(&sc->tz_zone.psl, sizeof(sc->tz_zone.psl));
/* Evaluate thermal zone parameters. */
for (i = 0; i < TZ_NUMLEVELS; i++) {