From: Sriram Yagnaraman <sriram.yagnaraman@xxxxxxxx>
Introduce igb_xdp_is_enabled() to check if an XDP program is assigned to
the device. Use that wherever xdp_prog is read and evaluated.
Signed-off-by: Sriram Yagnaraman <sriram.yagnaraman@xxxxxxxx>
[Kurt: Split patches and use READ_ONCE()]
Signed-off-by: Kurt Kanzenbach <kurt@xxxxxxxxxxxxx>
Acked-by: Maciej Fijalkowski <maciej.fijalkowski@xxxxxxxxx>
---
drivers/net/ethernet/intel/igb/igb.h | 5 +++++
drivers/net/ethernet/intel/igb/igb_main.c | 8 +++++---
2 files changed, 10 insertions(+), 3 deletions(-)
diff --git a/drivers/net/ethernet/intel/igb/igb.h b/drivers/net/ethernet/intel/igb/igb.h
index 1bfe703e73d9..6e2b61ecff68 100644
--- a/drivers/net/ethernet/intel/igb/igb.h
+++ b/drivers/net/ethernet/intel/igb/igb.h
@@ -826,6 +826,11 @@ static inline struct igb_ring *igb_xdp_tx_queue_mapping(struct igb_adapter *adap
return adapter->tx_ring[r_idx];
}
+static inline bool igb_xdp_is_enabled(struct igb_adapter *adapter)
+{
+ return !!READ_ONCE(adapter->xdp_prog);
+}
+
int igb_add_filter(struct igb_adapter *adapter,
struct igb_nfc_filter *input);
int igb_erase_filter(struct igb_adapter *adapter,
diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
index 5a44867bcb26..fc30966282c5 100644
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -2926,7 +2926,8 @@ int igb_xdp_xmit_back(struct igb_adapter *adapter, struct xdp_buff *xdp)
/* During program transitions its possible adapter->xdp_prog is assigned
* but ring has not been configured yet. In this case simply abort xmit.
*/
- tx_ring = adapter->xdp_prog ? igb_xdp_tx_queue_mapping(adapter) : NULL;
+ tx_ring = igb_xdp_is_enabled(adapter) ?
+ igb_xdp_tx_queue_mapping(adapter) : NULL;
if (unlikely(!tx_ring))
return IGB_XDP_CONSUMED;
@@ -2959,7 +2960,8 @@ static int igb_xdp_xmit(struct net_device *dev, int n,
/* During program transitions its possible adapter->xdp_prog is assigned
* but ring has not been configured yet. In this case simply abort xmit.
*/
- tx_ring = adapter->xdp_prog ? igb_xdp_tx_queue_mapping(adapter) : NULL;
+ tx_ring = igb_xdp_is_enabled(adapter) ?
+ igb_xdp_tx_queue_mapping(adapter) : NULL;
if (unlikely(!tx_ring))
return -ENXIO;
@@ -6593,7 +6595,7 @@ static int igb_change_mtu(struct net_device *netdev, int new_mtu)
struct igb_adapter *adapter = netdev_priv(netdev);
int max_frame = new_mtu + IGB_ETH_PKT_HDR_PAD;
- if (adapter->xdp_prog) {
+ if (igb_xdp_is_enabled(adapter)) {
int i;
for (i = 0; i < adapter->num_rx_queues; i++) {
--
2.39.5
