Commit 78a55d05 authored by Arthur Kiyanovski's avatar Arthur Kiyanovski Committed by David S. Miller

net: ena: fix NULL dereference due to untimely napi initialization

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.

Fixes: 1738cd3e ("net: ena: Add a driver for Amazon Elastic Network Adapters (ENA)")
Signed-off-by: default avatarArthur Kiyanovski <akiyano@amazon.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent d7703ddb
......@@ -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;
......
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