diff --git a/drivers/infiniband/hw/hfi1/chip.c b/drivers/infiniband/hw/hfi1/chip.c
index 44322c645469..8b8840a676e4 100644
--- a/drivers/infiniband/hw/hfi1/chip.c
+++ b/drivers/infiniband/hw/hfi1/chip.c
@@ -8344,6 +8344,52 @@ static int read_lcb_via_8051(struct hfi1_devdata *dd, u32 addr, u64 *data)
 	return 0;
 }
 
+/*
+ * Provide a cache for some of the LCB registers in case the LCB is
+ * unavailable.
+ * (The LCB is unavailable in certain link states, for example.)
+ */
+struct lcb_datum {
+	u32 off;
+	u64 val;
+};
+
+static struct lcb_datum lcb_cache[] = {
+	{ DC_LCB_ERR_INFO_RX_REPLAY_CNT, 0},
+	{ DC_LCB_ERR_INFO_SEQ_CRC_CNT, 0 },
+	{ DC_LCB_ERR_INFO_REINIT_FROM_PEER_CNT, 0 },
+};
+
+static void update_lcb_cache(struct hfi1_devdata *dd)
+{
+	int i;
+	int ret;
+	u64 val;
+
+	for (i = 0; i < ARRAY_SIZE(lcb_cache); i++) {
+		ret = read_lcb_csr(dd, lcb_cache[i].off, &val);
+
+		/* Update if we get good data */
+		if (likely(ret != -EBUSY))
+			lcb_cache[i].val = val;
+	}
+}
+
+static int read_lcb_cache(u32 off, u64 *val)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(lcb_cache); i++) {
+		if (lcb_cache[i].off == off) {
+			*val = lcb_cache[i].val;
+			return 0;
+		}
+	}
+
+	pr_warn("%s bad offset 0x%x\n", __func__, off);
+	return -1;
+}
+
 /*
  * Read an LCB CSR.  Access may not be in host control, so check.
  * Return 0 on success, -EBUSY on failure.
@@ -8355,9 +8401,13 @@ int read_lcb_csr(struct hfi1_devdata *dd, u32 addr, u64 *data)
 	/* if up, go through the 8051 for the value */
 	if (ppd->host_link_state & HLS_UP)
 		return read_lcb_via_8051(dd, addr, data);
-	/* if going up or down, no access */
-	if (ppd->host_link_state & (HLS_GOING_UP | HLS_GOING_OFFLINE))
-		return -EBUSY;
+	/* if going up or down, check the cache, otherwise, no access */
+	if (ppd->host_link_state & (HLS_GOING_UP | HLS_GOING_OFFLINE)) {
+		if (read_lcb_cache(addr, data))
+			return -EBUSY;
+		return 0;
+	}
+
 	/* otherwise, host has access */
 	*data = read_csr(dd, addr);
 	return 0;
@@ -10145,6 +10195,8 @@ static int goto_offline(struct hfi1_pportdata *ppd, u8 rem_reason)
 	int do_transition;
 	int do_wait;
 
+	update_lcb_cache(dd);
+
 	previous_state = ppd->host_link_state;
 	ppd->host_link_state = HLS_GOING_OFFLINE;
 	pstate = read_physical_state(dd);