diff --git a/drivers/pci/switch/switchtec.c b/drivers/pci/switch/switchtec.c
index e22766c79fe9..30f6e080bad8 100644
--- a/drivers/pci/switch/switchtec.c
+++ b/drivers/pci/switch/switchtec.c
@@ -658,19 +658,25 @@ static int ioctl_flash_part_info(struct switchtec_dev *stdev,
 
 static int ioctl_event_summary(struct switchtec_dev *stdev,
 	struct switchtec_user *stuser,
-	struct switchtec_ioctl_event_summary __user *usum)
+	struct switchtec_ioctl_event_summary __user *usum,
+	size_t size)
 {
-	struct switchtec_ioctl_event_summary s = {0};
+	struct switchtec_ioctl_event_summary *s;
 	int i;
 	u32 reg;
+	int ret = 0;
 
-	s.global = ioread32(&stdev->mmio_sw_event->global_summary);
-	s.part_bitmap = ioread32(&stdev->mmio_sw_event->part_event_bitmap);
-	s.local_part = ioread32(&stdev->mmio_part_cfg->part_event_summary);
+	s = kzalloc(sizeof(*s), GFP_KERNEL);
+	if (!s)
+		return -ENOMEM;
+
+	s->global = ioread32(&stdev->mmio_sw_event->global_summary);
+	s->part_bitmap = ioread32(&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++) {
 		reg = ioread32(&stdev->mmio_part_cfg_all[i].part_event_summary);
-		s.part[i] = reg;
+		s->part[i] = reg;
 	}
 
 	for (i = 0; i < SWITCHTEC_MAX_PFF_CSR; i++) {
@@ -679,15 +685,19 @@ static int ioctl_event_summary(struct switchtec_dev *stdev,
 			break;
 
 		reg = ioread32(&stdev->mmio_pff_csr[i].pff_event_summary);
-		s.pff[i] = reg;
+		s->pff[i] = reg;
 	}
 
-	if (copy_to_user(usum, &s, sizeof(s)))
-		return -EFAULT;
+	if (copy_to_user(usum, s, size)) {
+		ret = -EFAULT;
+		goto error_case;
+	}
 
 	stuser->event_cnt = atomic_read(&stdev->event_cnt);
 
-	return 0;
+error_case:
+	kfree(s);
+	return ret;
 }
 
 static u32 __iomem *global_ev_reg(struct switchtec_dev *stdev,
@@ -977,8 +987,9 @@ static long switchtec_dev_ioctl(struct file *filp, unsigned int cmd,
 	case SWITCHTEC_IOCTL_FLASH_PART_INFO:
 		rc = ioctl_flash_part_info(stdev, argp);
 		break;
-	case SWITCHTEC_IOCTL_EVENT_SUMMARY:
-		rc = ioctl_event_summary(stdev, stuser, argp);
+	case SWITCHTEC_IOCTL_EVENT_SUMMARY_LEGACY:
+		rc = ioctl_event_summary(stdev, stuser, argp,
+					 sizeof(struct switchtec_ioctl_event_summary_legacy));
 		break;
 	case SWITCHTEC_IOCTL_EVENT_CTL:
 		rc = ioctl_event_ctl(stdev, argp);
@@ -989,6 +1000,10 @@ static long switchtec_dev_ioctl(struct file *filp, unsigned int cmd,
 	case SWITCHTEC_IOCTL_PORT_TO_PFF:
 		rc = ioctl_port_to_pff(stdev, argp);
 		break;
+	case SWITCHTEC_IOCTL_EVENT_SUMMARY:
+		rc = ioctl_event_summary(stdev, stuser, argp,
+					 sizeof(struct switchtec_ioctl_event_summary));
+		break;
 	default:
 		rc = -ENOTTY;
 		break;
@@ -1162,7 +1177,8 @@ static int mask_event(struct switchtec_dev *stdev, int eid, int idx)
 	if (!(hdr & SWITCHTEC_EVENT_OCCURRED && hdr & SWITCHTEC_EVENT_EN_IRQ))
 		return 0;
 
-	if (eid == SWITCHTEC_IOCTL_EVENT_LINK_STATE)
+	if (eid == SWITCHTEC_IOCTL_EVENT_LINK_STATE ||
+	    eid == SWITCHTEC_IOCTL_EVENT_MRPC_COMP)
 		return 0;
 
 	dev_dbg(&stdev->dev, "%s: %d %d %x\n", __func__, eid, idx, hdr);
diff --git a/include/linux/switchtec.h b/include/linux/switchtec.h
index 52a079b3a9a6..0cfc34ac37fb 100644
--- a/include/linux/switchtec.h
+++ b/include/linux/switchtec.h
@@ -20,7 +20,7 @@
 #include <linux/cdev.h>
 
 #define SWITCHTEC_MRPC_PAYLOAD_SIZE 1024
-#define SWITCHTEC_MAX_PFF_CSR 48
+#define SWITCHTEC_MAX_PFF_CSR 255
 
 #define SWITCHTEC_EVENT_OCCURRED BIT(0)
 #define SWITCHTEC_EVENT_CLEAR    BIT(0)
diff --git a/include/uapi/linux/switchtec_ioctl.h b/include/uapi/linux/switchtec_ioctl.h
index 4f4daf8db954..c912b5a678e4 100644
--- a/include/uapi/linux/switchtec_ioctl.h
+++ b/include/uapi/linux/switchtec_ioctl.h
@@ -50,7 +50,7 @@ struct switchtec_ioctl_flash_part_info {
 	__u32 active;
 };
 
-struct switchtec_ioctl_event_summary {
+struct switchtec_ioctl_event_summary_legacy {
 	__u64 global;
 	__u64 part_bitmap;
 	__u32 local_part;
@@ -59,6 +59,15 @@ struct switchtec_ioctl_event_summary {
 	__u32 pff[48];
 };
 
+struct switchtec_ioctl_event_summary {
+	__u64 global;
+	__u64 part_bitmap;
+	__u32 local_part;
+	__u32 padding;
+	__u32 part[48];
+	__u32 pff[255];
+};
+
 #define SWITCHTEC_IOCTL_EVENT_STACK_ERROR		0
 #define SWITCHTEC_IOCTL_EVENT_PPU_ERROR			1
 #define SWITCHTEC_IOCTL_EVENT_ISP_ERROR			2
@@ -127,6 +136,8 @@ struct switchtec_ioctl_pff_port {
 	_IOWR('W', 0x41, struct switchtec_ioctl_flash_part_info)
 #define SWITCHTEC_IOCTL_EVENT_SUMMARY \
 	_IOR('W', 0x42, struct switchtec_ioctl_event_summary)
+#define SWITCHTEC_IOCTL_EVENT_SUMMARY_LEGACY \
+	_IOR('W', 0x42, struct switchtec_ioctl_event_summary_legacy)
 #define SWITCHTEC_IOCTL_EVENT_CTL \
 	_IOWR('W', 0x43, struct switchtec_ioctl_event_ctl)
 #define SWITCHTEC_IOCTL_PFF_TO_PORT \