diff options
| author | Julian Wiedmann <jwi@linux.vnet.ibm.com> | 2017-10-18 17:40:18 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-10-20 13:11:04 +0100 |
| commit | 6e6f472d92bd4ccd88a9a12e55b484ab417c168c (patch) | |
| tree | 6de777b61cd6363ee289bdde5edd3114a3fa87ad /drivers/s390/net | |
| parent | 83cf79a2fec3cf499eb6cb9eb608656fc2a82776 (diff) | |
| download | blackbird-obmc-linux-6e6f472d92bd4ccd88a9a12e55b484ab417c168c.tar.gz blackbird-obmc-linux-6e6f472d92bd4ccd88a9a12e55b484ab417c168c.zip | |
s390/qeth: clean up initial MTU determination
1. Drop the support for Token Ring,
2. use the ETH_DATA_LEN macro for the default L2 MTU,
3. handle OSM via the default case (as OSM is L2-only), and
4. document why the L3 MTU is reduced.
Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/s390/net')
| -rw-r--r-- | drivers/s390/net/qeth_core_main.c | 14 |
1 files changed, 4 insertions, 10 deletions
diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c index 735b03cae727..acf16fa75c63 100644 --- a/drivers/s390/net/qeth_core_main.c +++ b/drivers/s390/net/qeth_core_main.c @@ -2219,18 +2219,12 @@ static int qeth_get_initial_mtu_for_card(struct qeth_card *card) case QETH_CARD_TYPE_IQD: return card->info.max_mtu; case QETH_CARD_TYPE_OSD: - switch (card->info.link_type) { - case QETH_LINK_TYPE_HSTR: - case QETH_LINK_TYPE_LANE_TR: - return 2000; - default: - return card->options.layer2 ? 1500 : 1492; - } - case QETH_CARD_TYPE_OSM: case QETH_CARD_TYPE_OSX: - return card->options.layer2 ? 1500 : 1492; + if (!card->options.layer2) + return ETH_DATA_LEN - 8; /* L3: allow for LLC + SNAP */ + /* fall through */ default: - return 1500; + return ETH_DATA_LEN; } } |
