diff options
Diffstat (limited to 'drivers/clocksource')
| -rw-r--r-- | drivers/clocksource/sh_cmt.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/drivers/clocksource/sh_cmt.c b/drivers/clocksource/sh_cmt.c index 26919556ef..b72b36e0ab 100644 --- a/drivers/clocksource/sh_cmt.c +++ b/drivers/clocksource/sh_cmt.c @@ -528,6 +528,7 @@ static void sh_cmt_set_next(struct sh_cmt_channel *ch, unsigned long delta) static irqreturn_t sh_cmt_interrupt(int irq, void *dev_id) { struct sh_cmt_channel *ch = dev_id; + unsigned long flags; /* clear flags */ sh_cmt_write_cmcsr(ch, sh_cmt_read_cmcsr(ch) & @@ -558,6 +559,8 @@ static irqreturn_t sh_cmt_interrupt(int irq, void *dev_id) ch->flags &= ~FLAG_SKIPEVENT; + raw_spin_lock_irqsave(&ch->lock, flags); + if (ch->flags & FLAG_REPROGRAM) { ch->flags &= ~FLAG_REPROGRAM; sh_cmt_clock_event_program_verify(ch, 1); @@ -570,6 +573,8 @@ static irqreturn_t sh_cmt_interrupt(int irq, void *dev_id) ch->flags &= ~FLAG_IRQCONTEXT; + raw_spin_unlock_irqrestore(&ch->lock, flags); + return IRQ_HANDLED; } @@ -780,12 +785,18 @@ static int sh_cmt_clock_event_next(unsigned long delta, struct clock_event_device *ced) { struct sh_cmt_channel *ch = ced_to_sh_cmt(ced); + unsigned long flags; BUG_ON(!clockevent_state_oneshot(ced)); + + raw_spin_lock_irqsave(&ch->lock, flags); + if (likely(ch->flags & FLAG_IRQCONTEXT)) ch->next_match_value = delta - 1; else - sh_cmt_set_next(ch, delta - 1); + __sh_cmt_set_next(ch, delta - 1); + + raw_spin_unlock_irqrestore(&ch->lock, flags); return 0; } |