[ACPI] HPET driver now checks for acpi_register_gsi() errors

Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 6 insertions, 2 deletions

diff --git a/drivers/char/hpet.c b/drivers/char/hpet.c
index 5ec732e6ca92..a8d4c47f7add 100644
--- a/drivers/char/hpet.c
+++ b/drivers/char/hpet.c
@@ -906,11 +906,15 @@ static acpi_status hpet_resources(struct acpi_resource *res, void *data)
                 if (irqp->number_of_interrupts > 0) {
                         hdp->hd_nirqs = irqp->number_of_interrupts;
 
-                        for (i = 0; i < hdp->hd_nirqs; i++)
-                                hdp->hd_irq[i] =
+                        for (i = 0; i < hdp->hd_nirqs; i++) {
+                                int rc =
                                     acpi_register_gsi(irqp->interrupts[i],
                                                       irqp->edge_level,
                                                       irqp->active_high_low);
+                                if (rc < 0)
+                                        return AE_ERROR;
+                                hdp->hd_irq[i] = rc;
+                        }
                 }
         }