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Commit fe44014a authored by Stefan Raspl's avatar Stefan Raspl Committed by David S. Miller
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qeth: Increase default MTU for OSA devices 



Increase the default MTU for real OSA devices in layer 2 mode
to 1500 Bytes for increased compatibility.

Signed-off-by: default avatarStefan Raspl <raspl@linux.vnet.ibm.com>
Signed-off-by: default avatarFrank Blaschka <blaschka@linux.vnet.ibm.com>
Reviewed-by: default avatarUrsula Braun <ursula.braun@de.ibm.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 819bc78f

drivers/s390/net/qeth_core_main.c

+4 −3
Original line number Diff line number Diff line
@@ -2198,11 +2198,11 @@ static inline int qeth_get_initial_mtu_for_card(struct qeth_card *card) 
		case QETH_LINK_TYPE_LANE_TR:

			return 2000;

		default:

			return 1492;

			return card->options.layer2 ? 1500 : 1492;

		}

	case QETH_CARD_TYPE_OSM:

	case QETH_CARD_TYPE_OSX:

		return 1492;

		return card->options.layer2 ? 1500 : 1492;

	default:

		return 1500;

	}
@@ -2275,9 +2275,10 @@ static int qeth_ulp_enable_cb(struct qeth_card *card, struct qeth_reply *reply, 
		card->info.max_mtu = mtu;

		card->qdio.in_buf_size = mtu + 2 * PAGE_SIZE;

	} else {

		card->info.initial_mtu = qeth_get_initial_mtu_for_card(card);

		card->info.max_mtu = *(__u16 *)QETH_ULP_ENABLE_RESP_MAX_MTU(

			iob->data);

		card->info.initial_mtu = min(card->info.max_mtu,

					qeth_get_initial_mtu_for_card(card));

		card->qdio.in_buf_size = QETH_IN_BUF_SIZE_DEFAULT;

	}