sfc: Use dev_kfree_skb() in efx_end_loopback()

Fix CID 102619 in the Coverity report on Linux.

efx_end_loopback() iterates over an array of skb pointers of which
some may be null (if efx_begin_loopback() failed).  It should not use
dev_kfree_skb_irq(), which requires non-null pointers.  In practice
this is safe because it does not run in interrupt context and
therefore always ends up calling dev_kfree_skb(), which does allow
null pointers.  But we should make that explicit.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>

diff --git a/drivers/net/ethernet/sfc/selftest.c b/drivers/net/ethernet/sfc/selftest.c
index de4c006..ccc428f 100644 (file)
--- a/drivers/net/ethernet/sfc/selftest.c
+++ b/drivers/net/ethernet/sfc/selftest.c
@@ -488,7 +488,7 @@ static int efx_end_loopback(struct efx_tx_queue *tx_queue,
                skb = state->skbs[i];
                if (skb && !skb_shared(skb))
                        ++tx_done;
-               dev_kfree_skb_any(skb);
+               dev_kfree_skb(skb);
        }
 
        netif_tx_unlock_bh(efx->net_dev);