net: ena: Change WARN_ON expression in ena_del_napi_in_range()

The ena_del_napi_in_range() function unregisters the napi handler for
rings in a given range.
This function had the following WARN_ON macro:

    WARN_ON(ENA_IS_XDP_INDEX(adapter, i) &&
	    adapter->ena_napi[i].xdp_ring);

This macro prints the call stack if the expression inside of it is
true [1], but the expression inside of it is the wanted situation.
The expression checks whether the ring has an XDP queue and its index
corresponds to a XDP one.

This patch changes the expression to
    !ENA_IS_XDP_INDEX(adapter, i) && adapter->ena_napi[i].xdp_ring
which indicates an unwanted situation.

Also, change the structure of the function. The napi handler is
unregistered for all rings, and so there's no need to check whether the
index is an XDP index or not. By removing this check the code becomes
much more readable.

Fixes: 548c4940b9f1 ("net: ena: Implement XDP_TX action")
Signed-off-by: Shay Agroskin <shayagr@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.c b/drivers/net/ethernet/amazon/ena/ena_netdev.c
index 44aeace196f07a81b149c0251a894faaec532123..233db15c970d6b46ff2fcbe1a0981f2617e5f0ea 100644 (file)
--- a/drivers/net/ethernet/amazon/ena/ena_netdev.c
+++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c
@@ -2180,13 +2180,10 @@ static void ena_del_napi_in_range(struct ena_adapter *adapter,
        int i;
 
        for (i = first_index; i < first_index + count; i++) {
-               /* Check if napi was initialized before */
-               if (!ENA_IS_XDP_INDEX(adapter, i) ||
-                   adapter->ena_napi[i].xdp_ring)
-                       netif_napi_del(&adapter->ena_napi[i].napi);
-               else
-                       WARN_ON(ENA_IS_XDP_INDEX(adapter, i) &&
-                               adapter->ena_napi[i].xdp_ring);
+               netif_napi_del(&adapter->ena_napi[i].napi);
+
+               WARN_ON(!ENA_IS_XDP_INDEX(adapter, i) &&
+                       adapter->ena_napi[i].xdp_ring);
        }
 }