From: Stefan Raspl <raspl@xxxxxxxxxxxxxxxxxx>
Increase the default MTU for real OSA devices in layer 2 mode
to 1500 Bytes for increased compatibility.
Signed-off-by: Stefan Raspl <raspl@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Frank Blaschka <blaschka@xxxxxxxxxxxxxxxxxx>
Reviewed-by: Ursula Braun <ursula.braun@xxxxxxxxxx>
---
drivers/s390/net/qeth_core_main.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
--- a/drivers/s390/net/qeth_core_main.c
+++ b/drivers/s390/net/qeth_core_main.c
@@ -2198,11 +2198,11 @@ static inline int qeth_get_initial_mtu_f
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 qet
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;
}
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