bnx2x: Clean the sp rtnl task upon unload

While unloading, bnx2x needs to clean the sp_rtnl_state to prevent
configuration made before the unload to be applied afterwards with
stale values.

Signed-off-by: Dmitry Kravkov <dmitry@broadcom.com>
Signed-off-by: Yuval Mintz <yuvalmin@broadcom.com>
Signed-off-by: Ariel Elior <ariele@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c

@@ -2959,6 +2959,10 @@ int bnx2x_nic_unload(struct bnx2x *bp, int unload_mode, bool keep_link)
 
 	bp->port.pmf = 0;
 
+	/* clear pending work in rtnl task */
+	bp->sp_rtnl_state = 0;
+	smp_mb();
+
 	/* Free SKBs, SGEs, TPA pool and driver internals */
 	bnx2x_free_skbs(bp);
 	if (CNIC_LOADED(bp))