i40e: Fix wrong check for I40E_TXR_FLAGS_WB_ON_ITR

BugLink: https://bugs.launchpad.net/bugs/2049417

[ Upstream commit 77a8c98 ]

The I40E_TXR_FLAGS_WB_ON_ITR is i40e_ring flag and not i40e_pf one.

Fixes: 8e0764b ("i40e/i40evf: Add support for writeback on ITR feature for X722")
Signed-off-by: Ivan Vecera <[email protected]>
Tested-by: Pucha Himasekhar Reddy <[email protected]> (A Contingent worker at Intel)
Signed-off-by: Jacob Keller <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>
Signed-off-by: Roxana Nicolescu <[email protected]>
Signed-off-by: Stefan Bader <[email protected]>

Author: Ivan Vecera

drivers/net/ethernet/intel/i40e/i40e_txrx.c

@@ -2759,7 +2759,7 @@ int i40e_napi_poll(struct napi_struct *napi, int budget)
 		return budget;
 	}
 
-	if (vsi->back->flags & I40E_TXR_FLAGS_WB_ON_ITR)
+	if (q_vector->tx.ring[0].flags & I40E_TXR_FLAGS_WB_ON_ITR)
 		q_vector->arm_wb_state = false;
 
 	/* Exit the polling mode, but don't re-enable interrupts if stack might