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Fix a race condition where interrupts set up after boot could be enabled in

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the PIC before the interrupt handler was set. If the interrupt triggered in
that window, then the interrupt vector would be disabled.

Reported by:	Marco Trillo
This commit is contained in:
Nathan Whitehorn 2009-01-25 17:50:53 +00:00
parent 55b043392b
commit 2347f54879
1 changed files with 6 additions and 3 deletions
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9
sys/powerpc/powerpc/intr_machdep.c
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@ -243,7 +243,7 @@ powerpc_setup_intr(const char *name, u_int irq, driver_filter_t filter,
driver_intr_t handler, void *arg, enum intr_type flags, void **cookiep)
{
struct powerpc_intr *i;
int error;
int error, enable = 0;
i = intr_lookup(irq);
if (i == NULL)
@ -258,13 +258,16 @@ powerpc_setup_intr(const char *name, u_int irq, driver_filter_t filter,
i->cntp = &intrcnt[i->vector];
if (!cold)
PIC_ENABLE(pic, i->irq, i->vector);
enable = 1;
}
error = intr_event_add_handler(i->event, name, filter, handler, arg,
intr_priority(flags), flags, cookiep);
intrcnt_setname(i->event->ie_fullname, i->vector);
if (!cold && enable)
PIC_ENABLE(pic, i->irq, i->vector);
return (error);
}