diff --git a/drivers/pci/switch/switchtec.c b/drivers/pci/switch/switchtec.c
index e3aefdafae89..0941555b84a5 100644
--- a/drivers/pci/switch/switchtec.c
+++ b/drivers/pci/switch/switchtec.c
@@ -23,7 +23,7 @@
 #include <linux/pci.h>
 #include <linux/cdev.h>
 #include <linux/wait.h>
-
+#include <linux/io-64-nonatomic-lo-hi.h>
 #include <linux/nospec.h>
 
 MODULE_DESCRIPTION("Microsemi Switchtec(tm) PCIe Management Driver");
@@ -898,7 +898,7 @@ static int ioctl_event_summary(struct switchtec_dev *stdev,
 	u32 reg;
 
 	s.global = ioread32(&stdev->mmio_sw_event->global_summary);
-	s.part_bitmap = ioread32(&stdev->mmio_sw_event->part_event_bitmap);
+	s.part_bitmap = readq(&stdev->mmio_sw_event->part_event_bitmap);
 	s.local_part = ioread32(&stdev->mmio_part_cfg->part_event_summary);
 
 	for (i = 0; i < stdev->partition_count; i++) {