From: Maciej Fijalkowski <maciej.fijalkowski@xxxxxxxxx>
commit 6c7273a266759d9d36f7c862149f248bcdeddc0f upstream.
Commit c685c69fba71 ("ixgbe: don't do any AF_XDP zero-copy transmit if
netif is not OK") addressed the ring transient state when
MEM_TYPE_XSK_BUFF_POOL was being configured which in turn caused the
interface to through down/up. Maurice reported that when carrier is not
ok and xsk_pool is present on ring pair, ksoftirqd will consume 100% CPU
cycles due to the constant NAPI rescheduling as ixgbe_poll() states that
there is still some work to be done.
To fix this, do not set work_done to false for a !netif_carrier_ok().
Fixes: c685c69fba71 ("ixgbe: don't do any AF_XDP zero-copy transmit if netif is not OK")
Reported-by: Maurice Baijens <maurice.baijens@xxxxxxxxxx>
Tested-by: Maurice Baijens <maurice.baijens@xxxxxxxxxx>
Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@xxxxxxxxx>
Tested-by: Sandeep Penigalapati <sandeep.penigalapati@xxxxxxxxx>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@xxxxxxxxx>
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/ethernet/intel/ixgbe/ixgbe_xsk.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_xsk.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_xsk.c
@@ -583,12 +583,14 @@ static bool ixgbe_xmit_zc(struct ixgbe_r
u32 cmd_type;
while (budget-- > 0) {
- if (unlikely(!ixgbe_desc_unused(xdp_ring)) ||
- !netif_carrier_ok(xdp_ring->netdev)) {
+ if (unlikely(!ixgbe_desc_unused(xdp_ring))) {
work_done = false;
break;
}
+ if (!netif_carrier_ok(xdp_ring->netdev))
+ break;
+
if (!xsk_umem_consume_tx(xdp_ring->xsk_umem, &desc))
break;
