Commit b89869da authored by Sudarsana Reddy Kalluru's avatar Sudarsana Reddy Kalluru Committed by David S. Miller

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: default avatarSudarsana Reddy Kalluru <skalluru@marvell.com>
Signed-off-by: default avatarAriel Elior <aelior@marvell.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 43d28166
...@@ -1663,8 +1663,11 @@ static int qede_selftest_run_loopback(struct qede_dev *edev, u32 loopback_mode) ...@@ -1663,8 +1663,11 @@ static int qede_selftest_run_loopback(struct qede_dev *edev, u32 loopback_mode)
/* Wait for loopback configuration to apply */ /* Wait for loopback configuration to apply */
msleep_interruptible(500); msleep_interruptible(500);
/* prepare the loopback packet */ /* Setting max packet size to 1.5K to avoid data being split over
pkt_size = edev->ndev->mtu + ETH_HLEN; * 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); skb = netdev_alloc_skb(edev->ndev, pkt_size);
if (!skb) { if (!skb) {
......
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