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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Simon Horman , Jonathan Corbet , Shuah Khan , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, Matt Vollrath Subject: [PATCH iwl-next 6/8] e1000e: disable NAPI while interface is down Date: Sun, 30 Aug 2026 19:21:44 -0400 Message-ID: <20260830232146.36948-7-tactii@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260830232146.36948-1-tactii@gmail.com> References: <20260830232146.36948-1-tactii@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit The upcoming page pool conversion requires that NAPI is disabled during reconfiguration windows. Otherwise pool destruction would fail the assertion that NAPI will not race, causing a benign but loud warning. Move napi_disable into e1000e_down and add a napi_enable to e1000e_up. This follows convention of all other Intel drivers. Because napi_disable would hang if called twice, all callers of e1000e_down must now be serialized. As of this patch, I'm convinced this is true. Signed-off-by: Matt Vollrath Assisted-by: Claude:claude-5-fable --- drivers/net/ethernet/intel/e1000e/netdev.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c b/drivers/net/ethernet/intel/e1000e/netdev.c index 194166531bc8..6d846cacb026 100644 --- a/drivers/net/ethernet/intel/e1000e/netdev.c +++ b/drivers/net/ethernet/intel/e1000e/netdev.c @@ -3527,6 +3527,8 @@ void e1000e_up(struct e1000_adapter *adapter) /* hardware has been reset, we need to reload some things */ e1000_configure(adapter); + napi_enable(&adapter->napi); + clear_bit(__E1000_DOWN, &adapter->state); if (adapter->msix_entries) @@ -3601,7 +3603,7 @@ void e1000e_down(struct e1000_adapter *adapter, bool reset) e1000_irq_disable(adapter); - napi_synchronize(&adapter->napi); + napi_disable(&adapter->napi); timer_delete_sync(&adapter->watchdog_timer); timer_delete_sync(&adapter->phy_info_timer); @@ -4055,7 +4057,6 @@ int e1000e_close(struct net_device *netdev) netif_queue_set_napi(netdev, 0, NETDEV_QUEUE_TYPE_RX, NULL); netif_queue_set_napi(netdev, 0, NETDEV_QUEUE_TYPE_TX, NULL); - napi_disable(&adapter->napi); e1000e_free_tx_resources(adapter->tx_ring); e1000e_free_rx_resources(adapter->rx_ring); -- 2.43.0