diff options
Diffstat (limited to 'common/fan.c')
| -rw-r--r-- | common/fan.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/common/fan.c b/common/fan.c index 9196ddf36b..6cb64e777a 100644 --- a/common/fan.c +++ b/common/fan.c @@ -471,17 +471,23 @@ DECLARE_HOOK(HOOK_INIT, pwm_fan_init, HOOK_PRIO_DEFAULT); static void pwm_fan_second(void) { uint16_t *mapped = (uint16_t *)host_get_memmap(EC_MEMMAP_FAN); + uint16_t rpm; int stalled = 0; int fan; for (fan = 0; fan < CONFIG_FANS; fan++) { if (fan_is_stalled(fans[fan].ch)) { - mapped[fan] = EC_FAN_SPEED_STALLED; + rpm = EC_FAN_SPEED_STALLED; stalled = 1; cprints(CC_PWM, "Fan %d stalled!", fan); } else { - mapped[fan] = fan_get_rpm_actual(fans[fan].ch); + rpm = fan_get_rpm_actual(fans[fan].ch); } + + /* Lock ACPI read access to memmap during multi-byte write */ + host_lock_memmap(); + mapped[fan] = rpm; + host_unlock_memmap(); } /* |