ixgbe: check return value of napi_complete_done()

The NIC driver should only enable interrupts when napi_complete_done()
returns true. This patch adds the check for ixgbe.

Cc: stable@vger.kernel.org # 4.10+
Suggested-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Song Liu <songliubraving@fb.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 7 insertions, 5 deletions

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index f27d73a7bf16..6cdd58d9d461 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -3196,11 +3196,13 @@ int ixgbe_poll(struct napi_struct *napi, int budget)
                 return budget;
 
         /* all work done, exit the polling mode */
-        napi_complete_done(napi, work_done);
-        if (adapter->rx_itr_setting & 1)
-                ixgbe_set_itr(q_vector);
-        if (!test_bit(__IXGBE_DOWN, &adapter->state))
-                ixgbe_irq_enable_queues(adapter, BIT_ULL(q_vector->v_idx));
+        if (likely(napi_complete_done(napi, work_done))) {
+                if (adapter->rx_itr_setting & 1)
+                        ixgbe_set_itr(q_vector);
+                if (!test_bit(__IXGBE_DOWN, &adapter->state))
+                        ixgbe_irq_enable_queues(adapter,
+                                                BIT_ULL(q_vector->v_idx));
+        }
 
         return min(work_done, budget - 1);
 }