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| author | Daniel Lezcano <daniel.lezcano@linaro.org> | 2015-11-08 17:07:38 (GMT) |
|---|---|---|
| committer | Daniel Lezcano <daniel.lezcano@linaro.org> | 2015-12-15 08:42:16 (GMT) |
| commit | 7053fdac76451efe5f16c9e0974dc17fcf29f6d6 (patch) | |
| tree | 9dff88beb9d8b489955a3fc2115df7a8eb5cce74 | |
| parent | 54a0cd5a7e107ba0cf15a4fb876595d0c8a7faab (diff) | |
| download | linux-7053fdac76451efe5f16c9e0974dc17fcf29f6d6.tar.xz | |
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>
| -rw-r--r-- | drivers/clocksource/h8300_timer8.c | 15 |
1 files changed, 6 insertions, 9 deletions
diff --git a/drivers/clocksource/h8300_timer8.c b/drivers/clocksource/h8300_timer8.c index 3eedeff..7111b99 100644 --- a/drivers/clocksource/h8300_timer8.c +++ b/drivers/clocksource/h8300_timer8.c @@ -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; } |