1 files changed, 6 insertions, 5 deletions

diff --git a/arch/arm/mach-at91/at91sam926x_time.c b/arch/arm/mach-at91/at91sam926x_time.c
index 4bd56aee4370..608a63240b64 100644
--- a/arch/arm/mach-at91/at91sam926x_time.c
+++ b/arch/arm/mach-at91/at91sam926x_time.c
@@ -62,16 +62,12 @@ static struct clocksource pit_clk = {
 static void
 pit_clkevt_mode(enum clock_event_mode mode, struct clock_event_device *dev)
 {
-        unsigned long   flags;
-
         switch (mode) {
         case CLOCK_EVT_MODE_PERIODIC:
-                /* update clocksource counter, then enable the IRQ */
-                raw_local_irq_save(flags);
+                /* update clocksource counter */
                 pit_cnt += pit_cycle * PIT_PICNT(at91_sys_read(AT91_PIT_PIVR));
                 at91_sys_write(AT91_PIT_MR, (pit_cycle - 1) | AT91_PIT_PITEN
                                 | AT91_PIT_PITIEN);
-                raw_local_irq_restore(flags);
                 break;
         case CLOCK_EVT_MODE_ONESHOT:
                 BUG();
@@ -100,6 +96,11 @@ static struct clock_event_device pit_clkevt = {
  */
 static irqreturn_t at91sam926x_pit_interrupt(int irq, void *dev_id)
 {
+        /*
+         * irqs should be disabled here, but as the irq is shared they are only
+         * guaranteed to be off if the timer irq is registered first.
+         */
+        WARN_ON_ONCE(!irqs_disabled());
 
         /* The PIT interrupt may be disabled, and is shared */
         if ((pit_clkevt.mode == CLOCK_EVT_MODE_PERIODIC)