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 <skalluru@marvell.com>
Signed-off-by: Ariel Elior <aelior@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
/* 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) {