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

drivers/net/ethernet/qlogic/qede/qede_ethtool.c

+5 −2
Original line number Original line Diff line number Diff line
@@ -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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