diff mbox series

[net,5/5] ixgbe: don't do any AF_XDP zero-copy transmit if netif is not OK

Message ID 20190221193319.22318-6-jeffrey.t.kirsher@intel.com
State Accepted
Delegated to: David Miller
Headers show
Series Intel Wired LAN Driver Fixes 2019-02-21 | expand

Commit Message

Kirsher, Jeffrey T Feb. 21, 2019, 7:33 p.m. UTC 
From: Jan Sokolowski <jan.sokolowski@intel.com>

An issue has been found while testing zero-copy XDP that
causes a reset to be triggered. As it takes some time to
turn the carrier on after setting zc, and we already
start trying to transmit some packets, watchdog considers
this as an erroneous state and triggers a reset.

Don't do any work if netif carrier is not OK.

Fixes: 8221c5eba8c13 (ixgbe: add AF_XDP zero-copy Tx support)
Signed-off-by: Jan Sokolowski <jan.sokolowski@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---
 drivers/net/ethernet/intel/ixgbe/ixgbe_xsk.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_xsk.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_xsk.c
index 654ae92342ea..36a8879536a4 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_xsk.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_xsk.c
@@ -642,7 +642,8 @@  static bool ixgbe_xmit_zc(struct ixgbe_ring *xdp_ring, unsigned int budget)
 	dma_addr_t dma;
 
 	while (budget-- > 0) {
-		if (unlikely(!ixgbe_desc_unused(xdp_ring))) {
+		if (unlikely(!ixgbe_desc_unused(xdp_ring)) ||
+		    !netif_carrier_ok(xdp_ring->netdev)) {
 			work_done = false;
 			break;
 		}