Function ice_tx_xsk_pool() used to get XSK buffer pool associated
with XDP Tx queue returns NULL when number of ordinary Tx queues
is not equal to num_possible_cpus().
The function computes XDP Tx queue ID as an expression
`ring->q_index - vsi->num_xdp_txq` but this is wrong because
XDP Tx queues are placed after ordinary ones so the correct
formula is `ring->q_index - vsi->alloc_txq`.
Prior commit 792b2086584f ("ice: fix vsi->txq_map sizing") number
of XDP Tx queues was equal to number of ordinary Tx queues so
the bug in mentioned function was hidden.
Reproducer:
host# ethtool -L ens7f0 combined 1
host# ./xdpsock -i ens7f0 -q 0 -t -N
samples/bpf/xdpsock_user.c:kick_tx:794: errno: 6/"No such device or address"
sock0@ens7f0:0 txonly xdp-drv
pps pkts 0.00
rx 0 0
tx 0 0
Fixes: 2d4238f55697 ("ice: Add support for AF_XDP")
Fixes: 792b2086584f ("ice: fix vsi->txq_map sizing")
Signed-off-by: Ivan Vecera <ivecera@xxxxxxxxxx>
---
drivers/net/ethernet/intel/ice/ice.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/intel/ice/ice.h b/drivers/net/ethernet/intel/ice/ice.h
index b0b27bfcd7a2..d4f1874df7d0 100644
--- a/drivers/net/ethernet/intel/ice/ice.h
+++ b/drivers/net/ethernet/intel/ice/ice.h
@@ -710,7 +710,7 @@ static inline struct xsk_buff_pool *ice_tx_xsk_pool(struct ice_tx_ring *ring)
struct ice_vsi *vsi = ring->vsi;
u16 qid;
- qid = ring->q_index - vsi->num_xdp_txq;
+ qid = ring->q_index - vsi->alloc_txq;
if (!ice_is_xdp_ena_vsi(vsi) || !test_bit(qid, vsi->af_xdp_zc_qps))
return NULL;
--
2.34.1
