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clocksource/drivers/h8300_timer8: Remove pointless irq re-entrant safe code 

The current code assumes the interrupt function is re-entrant.

That is not correct. An interrupt handler is never invoked concurrently. The
interrupt line is masked on all processors.

Remove the chewing flags in the code.

Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
This commit is contained in:
Daniel Lezcano 2015-11-08 18:07:38 +01:00
parent 54a0cd5a7e
commit 7053fdac76
1 changed files with 6 additions and 9 deletions
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15
drivers/clocksource/h8300_timer8.c
View File

@ -24,8 +24,6 @@
#define TCORB 6
#define _8TCNT 8
#define FLAG_SKIPEVENT (1 << 1)
#define FLAG_IRQCONTEXT (1 << 2)
#define FLAG_STARTED (1 << 3)
#define SCALE 64
@ -67,14 +65,13 @@ static irqreturn_t timer8_interrupt(int irq, void *dev_id)
ctrl_outb(ctrl_inb(p->mapbase + _8TCSR) & ~0x40,
p->mapbase + _8TCSR);
p->flags |= FLAG_IRQCONTEXT;
ctrl_outw(p->tcora, p->mapbase + TCORA);
if (!(p->flags & FLAG_SKIPEVENT)) {
if (clockevent_state_oneshot(&p->ced))
ctrl_outw(0x0000, p->mapbase + _8TCR);
p->ced.event_handler(&p->ced);
}
p->flags &= ~(FLAG_SKIPEVENT | FLAG_IRQCONTEXT);
if (clockevent_state_oneshot(&p->ced))
ctrl_outw(0x0000, p->mapbase + _8TCR);
p->ced.event_handler(&p->ced);
return IRQ_HANDLED;
}