diff --git a/drivers/net/ethernet/freescale/enetc/ntmp.c b/drivers/net/ethernet/freescale/enetc/ntmp.c
index 703752995e93..0dad38735234 100644
--- a/drivers/net/ethernet/freescale/enetc/ntmp.c
+++ b/drivers/net/ethernet/freescale/enetc/ntmp.c
@@ -55,7 +55,7 @@ int ntmp_init_cbdr(struct netc_cbdr *cbdr, struct device *dev,
 	spin_lock_init(&cbdr->ring_lock);
 
 	cbdr->next_to_use = netc_read(cbdr->regs.pir);
-	cbdr->next_to_clean = netc_read(cbdr->regs.cir);
+	cbdr->next_to_clean = netc_read(cbdr->regs.cir) & NETC_CBDRCIR_INDEX;
 
 	/* Step 1: Configure the base address of the Control BD Ring */
 	netc_write(cbdr->regs.bar0, lower_32_bits(cbdr->dma_base_align));
@@ -98,7 +98,7 @@ static void ntmp_clean_cbdr(struct netc_cbdr *cbdr)
 	int i;
 
 	i = cbdr->next_to_clean;
-	while (netc_read(cbdr->regs.cir) != i) {
+	while ((netc_read(cbdr->regs.cir) & NETC_CBDRCIR_INDEX) != i) {
 		cbd = ntmp_get_cbd(cbdr, i);
 		memset(cbd, 0, sizeof(*cbd));
 		i = (i + 1) % cbdr->bd_num;
@@ -135,12 +135,19 @@ static int netc_xmit_ntmp_cmd(struct ntmp_user *user, union netc_cbd *cbd)
 	cbdr->next_to_use = i;
 	netc_write(cbdr->regs.pir, i);
 
-	err = read_poll_timeout_atomic(netc_read, val, val == i,
+	err = read_poll_timeout_atomic(netc_read, val,
+				       (val & NETC_CBDRCIR_INDEX) == i,
 				       NETC_CBDR_DELAY_US, NETC_CBDR_TIMEOUT,
 				       true, cbdr->regs.cir);
 	if (unlikely(err))
 		goto cbdr_unlock;
 
+	if (unlikely(val & NETC_CBDRCIR_SBE)) {
+		dev_err(user->dev, "Command BD system bus error\n");
+		err = -EIO;
+		goto cbdr_unlock;
+	}
+
 	dma_rmb();
 	/* Get the writeback command BD, because the caller may need
 	 * to check some other fields of the response header.
diff --git a/drivers/net/ethernet/freescale/enetc/ntmp_private.h b/drivers/net/ethernet/freescale/enetc/ntmp_private.h
index 34394e40fddd..3459cc45b610 100644
--- a/drivers/net/ethernet/freescale/enetc/ntmp_private.h
+++ b/drivers/net/ethernet/freescale/enetc/ntmp_private.h
@@ -12,6 +12,8 @@
 
 #define NTMP_EID_REQ_LEN	8
 #define NETC_CBDR_BD_NUM	256
+#define NETC_CBDRCIR_INDEX	GENMASK(9, 0)
+#define NETC_CBDRCIR_SBE	BIT(31)
 
 union netc_cbd {
 	struct {