diff --git a/drivers/net/ethernet/microsoft/mana/mana_bpf.c b/drivers/net/ethernet/microsoft/mana/mana_bpf.c
index b5e9bb184a1d..53308e139cbe 100644
--- a/drivers/net/ethernet/microsoft/mana/mana_bpf.c
+++ b/drivers/net/ethernet/microsoft/mana/mana_bpf.c
@@ -237,7 +237,8 @@ static int mana_xdp_set(struct net_device *ndev, struct bpf_prog *prog,
 		bpf_prog_put(old_prog);
 
 	if (prog)
-		ndev->max_mtu = MANA_XDP_MTU_MAX;
+		ndev->max_mtu = min_t(unsigned int, MANA_XDP_MTU_MAX,
+				      gc->adapter_mtu - ETH_HLEN);
 	else
 		ndev->max_mtu = gc->adapter_mtu - ETH_HLEN;
 
diff --git a/drivers/net/ethernet/microsoft/mana/mana_en.c b/drivers/net/ethernet/microsoft/mana/mana_en.c
index 87862b0434c7..7438ea6b3f26 100644
--- a/drivers/net/ethernet/microsoft/mana/mana_en.c
+++ b/drivers/net/ethernet/microsoft/mana/mana_en.c
@@ -1233,12 +1233,24 @@ int mana_gd_query_device_cfg(struct gdma_context *gc, u32 proto_major_ver,
 	*max_num_vports = resp.max_num_vports;
 
 	if (resp.hdr.response.msg_version >= GDMA_MESSAGE_V2) {
-		if (resp.adapter_mtu < ETH_MIN_MTU + ETH_HLEN) {
+		if (resp.adapter_mtu == 0) {
+			/*
+			 * Some older PF firmware versions report an
+			 * adapter_mtu of 0. MANA hardware always supports the
+			 * standard Ethernet MTU, so fall back to ETH_FRAME_LEN.
+			 * Jumbo frames will not be available in this case.
+			 */
+			dev_info(dev,
+				 "PF reported adapter_mtu of 0, falling back to %u (jumbo frames disabled)\n",
+				 ETH_FRAME_LEN);
+			gc->adapter_mtu = ETH_FRAME_LEN;
+		} else if (resp.adapter_mtu < ETH_MIN_MTU + ETH_HLEN) {
 			dev_err(dev, "Adapter MTU too small: %u\n",
 				resp.adapter_mtu);
 			return -EPROTO;
+		} else {
+			gc->adapter_mtu = resp.adapter_mtu;
 		}
-		gc->adapter_mtu = resp.adapter_mtu;
 	} else {
 		gc->adapter_mtu = ETH_FRAME_LEN;
 	}