From: Arthur Kiyanovski <akiy...@amazon.com>
napi poll functions should be initialized before running request_irq(),
to handle a rare condition where there is a pending interrupt, causing
the ISR to fire immediately while the poll function wasn't set yet,
causing a NULL dereference.
Signed-off-by: Arthur Kiyanovski <akiy...@amazon.com>
---
drivers/net/ethernet/amazon/ena/ena_netdev.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.c
b/drivers/net/ethernet/amazon/ena/ena_netdev.c
index 7282a27..8dd8065 100644
--- a/drivers/net/ethernet/amazon/ena/ena_netdev.c
+++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c
@@ -1575,8 +1575,6 @@ static int ena_up_complete(struct ena_adapter *adapter)
if (rc)
return rc;
- ena_init_napi(adapter);
-
ena_change_mtu(adapter->netdev, adapter->netdev->mtu);
ena_refill_all_rx_bufs(adapter);
@@ -1730,6 +1728,13 @@ static int ena_up(struct ena_adapter *adapter)
ena_setup_io_intr(adapter);
+ /* napi poll functions should be initialized before running
+ * request_irq(), to handle a rare condition where there is a pending
+ * interrupt, causing the ISR to fire immediately while the poll
+ * function wasn't set yet, causing a null dereference
+ */
+ ena_init_napi(adapter);
+
rc = ena_request_io_irq(adapter);
if (rc)
goto err_req_irq;
--
2.7.4
