From b89869da2db916914f6a2c7ab14183c8aef23d97 Mon Sep 17 00:00:00 2001 From: Sudarsana Reddy Kalluru Date: Thu, 7 Mar 2019 07:56:35 -0800 Subject: qede: Fix internal loopback failure with jumbo mtu configuration Driver uses port-mtu as packet-size for the loopback traffic. This patch limits the max packet size to 1.5K to avoid data being split over multiple buffer descriptors (BDs) in cases where MTU > PAGE_SIZE. Signed-off-by: Sudarsana Reddy Kalluru Signed-off-by: Ariel Elior Signed-off-by: David S. Miller --- drivers/net/ethernet/qlogic/qede/qede_ethtool.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) (limited to 'drivers') diff --git a/drivers/net/ethernet/qlogic/qede/qede_ethtool.c b/drivers/net/ethernet/qlogic/qede/qede_ethtool.c index c6238083e898..b4c8949933f1 100644 --- a/drivers/net/ethernet/qlogic/qede/qede_ethtool.c +++ b/drivers/net/ethernet/qlogic/qede/qede_ethtool.c @@ -1663,8 +1663,11 @@ static int qede_selftest_run_loopback(struct qede_dev *edev, u32 loopback_mode) /* Wait for loopback configuration to apply */ msleep_interruptible(500); - /* prepare the loopback packet */ - pkt_size = edev->ndev->mtu + ETH_HLEN; + /* Setting max packet size to 1.5K to avoid data being split over + * multiple BDs in cases where MTU > PAGE_SIZE. + */ + pkt_size = (((edev->ndev->mtu < ETH_DATA_LEN) ? + edev->ndev->mtu : ETH_DATA_LEN) + ETH_HLEN); skb = netdev_alloc_skb(edev->ndev, pkt_size); if (!skb) { -- cgit v1.2.3-59-g8ed1b