1 files changed, 4 insertions, 1 deletions

diff --git a/drivers/char/hpet.c b/drivers/char/hpet.c
index dfd7876f127c..fe6d4be48296 100644
--- a/drivers/char/hpet.c
+++ b/drivers/char/hpet.c
@@ -816,7 +816,7 @@ static unsigned long __hpet_calibrate(struct hpets *hpetp)
 
 static unsigned long hpet_calibrate(struct hpets *hpetp)
 {
-        unsigned long ret = -1;
+        unsigned long ret = ~0UL;
         unsigned long tmp;
 
         /*
@@ -1001,6 +1001,9 @@ static acpi_status hpet_resources(struct acpi_resource *res, void *data)
                 irqp = &res->data.extended_irq;
 
                 for (i = 0; i < irqp->interrupt_count; i++) {
+                        if (hdp->hd_nirqs >= HPET_MAX_TIMERS)
+                                break;
+
                         irq = acpi_register_gsi(NULL, irqp->interrupts[i],
                                       irqp->triggering, irqp->polarity);
                         if (irq < 0)