diff options
Diffstat (limited to 'kernel/time/tick-broadcast.c')
| -rw-r--r-- | kernel/time/tick-broadcast.c | 44 |
1 files changed, 29 insertions, 15 deletions
diff --git a/kernel/time/tick-broadcast.c b/kernel/time/tick-broadcast.c index 0962e057766..fc3fc79b3d5 100644 --- a/kernel/time/tick-broadcast.c +++ b/kernel/time/tick-broadcast.c @@ -64,8 +64,9 @@ static void tick_broadcast_start_periodic(struct clock_event_device *bc) */ int tick_check_broadcast_device(struct clock_event_device *dev) { - if (tick_broadcast_device.evtdev || - (dev->features & CLOCK_EVT_FEAT_C3STOP)) + if ((tick_broadcast_device.evtdev && + tick_broadcast_device.evtdev->rating >= dev->rating) || + (dev->features & CLOCK_EVT_FEAT_C3STOP)) return 0; clockevents_exchange_device(NULL, dev); @@ -176,8 +177,6 @@ static void tick_do_periodic_broadcast(void) */ static void tick_handle_periodic_broadcast(struct clock_event_device *dev) { - dev->next_event.tv64 = KTIME_MAX; - tick_do_periodic_broadcast(); /* @@ -218,26 +217,43 @@ static void tick_do_broadcast_on_off(void *why) bc = tick_broadcast_device.evtdev; /* - * Is the device in broadcast mode forever or is it not - * affected by the powerstate ? + * Is the device not affected by the powerstate ? */ - if (!dev || !tick_device_is_functional(dev) || - !(dev->features & CLOCK_EVT_FEAT_C3STOP)) + if (!dev || !(dev->features & CLOCK_EVT_FEAT_C3STOP)) goto out; - if (*reason == CLOCK_EVT_NOTIFY_BROADCAST_ON) { + /* + * Defect device ? + */ + if (!tick_device_is_functional(dev)) { + /* + * AMD C1E wreckage fixup: + * + * Device was registered functional in the first + * place. Now the secondary CPU detected the C1E + * misfeature and notifies us to fix it up + */ + if (*reason != CLOCK_EVT_NOTIFY_BROADCAST_FORCE) + goto out; + } + + switch (*reason) { + case CLOCK_EVT_NOTIFY_BROADCAST_ON: + case CLOCK_EVT_NOTIFY_BROADCAST_FORCE: if (!cpu_isset(cpu, tick_broadcast_mask)) { cpu_set(cpu, tick_broadcast_mask); if (td->mode == TICKDEV_MODE_PERIODIC) clockevents_set_mode(dev, CLOCK_EVT_MODE_SHUTDOWN); } - } else { + break; + case CLOCK_EVT_NOTIFY_BROADCAST_OFF: if (cpu_isset(cpu, tick_broadcast_mask)) { cpu_clear(cpu, tick_broadcast_mask); if (td->mode == TICKDEV_MODE_PERIODIC) tick_setup_periodic(dev, 0); } + break; } if (cpus_empty(tick_broadcast_mask)) @@ -515,11 +531,9 @@ static void tick_broadcast_clear_oneshot(int cpu) */ void tick_broadcast_setup_oneshot(struct clock_event_device *bc) { - if (bc->mode != CLOCK_EVT_MODE_ONESHOT) { - bc->event_handler = tick_handle_oneshot_broadcast; - clockevents_set_mode(bc, CLOCK_EVT_MODE_ONESHOT); - bc->next_event.tv64 = KTIME_MAX; - } + bc->event_handler = tick_handle_oneshot_broadcast; + clockevents_set_mode(bc, CLOCK_EVT_MODE_ONESHOT); + bc->next_event.tv64 = KTIME_MAX; } /* |