Title: [9820] trunk/arch/blackfin/kernel/time-ts.c: Blackfin: time-ts: ack gptimer sooner to avoid missing short ints
- Revision
- 9820
- Author
- vapier
- Date
- 2011-04-04 11:26:11 -0400 (Mon, 04 Apr 2011)
Log Message
Blackfin: time-ts: ack gptimer sooner to avoid missing short ints
Reported-by: isabelle leonardi
Modified Paths
Diff
Modified: trunk/arch/blackfin/kernel/time-ts.c (9819 => 9820)
--- trunk/arch/blackfin/kernel/time-ts.c 2011-04-04 15:20:50 UTC (rev 9819)
+++ trunk/arch/blackfin/kernel/time-ts.c 2011-04-04 15:26:11 UTC (rev 9820)
@@ -206,8 +206,14 @@
{
struct clock_event_device *evt = dev_id;
smp_mb();
+ /*
+ * We want to ACK before we handle so that we can handle smaller timer
+ * intervals. This way if the timer expires again while we're handling
+ * things, we're more likely to see that 2nd int rather than swallowing
+ * it by ACKing the int at the end of this handler.
+ */
+ bfin_gptmr0_ack();
evt->event_handler(evt);
- bfin_gptmr0_ack();
return IRQ_HANDLED;
}
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