ARM: 7586/1: sp804: set cpumask to cpu_possible_mask for clock event device
The SP804 driver statically initialises the cpumask of the clock event
device to be cpu_all_mask, which is derived from the compile-time
constant NR_CPUS. This breaks SMP_ON_UP systems where the interrupt
controller handling the sp804 doesn't have the irq_set_affinity callback
on the irq_chip, because the common timer code fails to identify the
device as cpu-local and ends up treating it as a broadcast device
instead.
This patch fixes the problem by using cpu_possible_mask at runtime,
which will correctly represent the possible CPUs when SMP_ON_UP is being
used.
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/common/timer-sp.c b/arch/arm/common/timer-sp.c
index df13a3f..9d2d3ba 100644
--- a/arch/arm/common/timer-sp.c
+++ b/arch/arm/common/timer-sp.c
@@ -162,7 +162,6 @@
.set_mode = sp804_set_mode,
.set_next_event = sp804_set_next_event,
.rating = 300,
- .cpumask = cpu_all_mask,
};
static struct irqaction sp804_timer_irq = {
@@ -185,6 +184,7 @@
clkevt_reload = DIV_ROUND_CLOSEST(rate, HZ);
evt->name = name;
evt->irq = irq;
+ evt->cpumask = cpu_possible_mask;
setup_irq(irq, &sp804_timer_irq);
clockevents_config_and_register(evt, rate, 0xf, 0xffffffff);