Merge branch '10GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/next-queue

Tony Nguyen says:

====================
Intel Wired LAN Driver Updates 2023-01-13 (ixgbe)

This series contains updates to ixgbe driver only.

Jesse resolves warning for RCU pointer by no longer restoring old
pointer.

Sebastian adds waiting for updating of link info on devices utilizing
crosstalk fix to avoid false link state.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

Author: davem330

drivers/net/ethernet/intel/ixgbe/ixgbe_common.c

@@ -3292,13 +3292,14 @@ static bool ixgbe_need_crosstalk_fix(struct ixgbe_hw *hw)
 s32 ixgbe_check_mac_link_generic(struct ixgbe_hw *hw, ixgbe_link_speed *speed,
 				 bool *link_up, bool link_up_wait_to_complete)
 {
+	bool crosstalk_fix_active = ixgbe_need_crosstalk_fix(hw);
 	u32 links_reg, links_orig;
 	u32 i;
 
 	/* If Crosstalk fix enabled do the sanity check of making sure
 	 * the SFP+ cage is full.
 	 */
-	if (ixgbe_need_crosstalk_fix(hw)) {
+	if (crosstalk_fix_active) {
 		u32 sfp_cage_full;
 
 		switch (hw->mac.type) {
@@ -3346,10 +3347,24 @@ s32 ixgbe_check_mac_link_generic(struct ixgbe_hw *hw, ixgbe_link_speed *speed,
 			links_reg = IXGBE_READ_REG(hw, IXGBE_LINKS);
 		}
 	} else {
-		if (links_reg & IXGBE_LINKS_UP)
+		if (links_reg & IXGBE_LINKS_UP) {
+			if (crosstalk_fix_active) {
+				/* Check the link state again after a delay
+				 * to filter out spurious link up
+				 * notifications.
+				 */
+				mdelay(5);
+				links_reg = IXGBE_READ_REG(hw, IXGBE_LINKS);
+				if (!(links_reg & IXGBE_LINKS_UP)) {
+					*link_up = false;
+					*speed = IXGBE_LINK_SPEED_UNKNOWN;
+					return 0;
+				}
+			}
 			*link_up = true;
-		else
+		} else {
 			*link_up = false;
+		}
 	}
 
 	switch (links_reg & IXGBE_LINKS_SPEED_82599) {

drivers/net/ethernet/intel/ixgbe/ixgbe_main.c

@@ -6647,7 +6647,7 @@ int ixgbe_setup_rx_resources(struct ixgbe_adapter *adapter,
 			     rx_ring->queue_index, ixgbe_rx_napi_id(rx_ring)) < 0)
 		goto err;
 
-	rx_ring->xdp_prog = adapter->xdp_prog;
+	WRITE_ONCE(rx_ring->xdp_prog, adapter->xdp_prog);
 
 	return 0;
 err:
@@ -10297,14 +10297,13 @@ static int ixgbe_xdp_setup(struct net_device *dev, struct bpf_prog *prog)
 			synchronize_rcu();
 		err = ixgbe_setup_tc(dev, adapter->hw_tcs);
 
-		if (err) {
-			rcu_assign_pointer(adapter->xdp_prog, old_prog);
+		if (err)
 			return -EINVAL;
-		}
 	} else {
-		for (i = 0; i < adapter->num_rx_queues; i++)
-			(void)xchg(&adapter->rx_ring[i]->xdp_prog,
-			    adapter->xdp_prog);
+		for (i = 0; i < adapter->num_rx_queues; i++) {
+			WRITE_ONCE(adapter->rx_ring[i]->xdp_prog,
+				   adapter->xdp_prog);
+		}
 	}
 
 	if (old_prog)