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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Oleksij Rempel , linux-kernel@vger.kernel.org (open list) Subject: [PATCH net v2] net: ag71xx: re-enable TX interrupts on RX OOM Date: Sun, 18 Oct 2026 19:01:47 -0700 Message-ID: <20261019020147.213746-1-rosenp@gmail.com> X-Mailer: git-send-email 2.56.0 Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit When the RX ring runs out of buffers the OOM path calls napi_complete() but does not re-enable interrupts. Because INT_POLL masks both RX and TX events, TX completions are blocked until the OOM timer fires (~100 ms), which can cause TX ring exhaustion and dropped packets. Restore TX interrupt delivery so the engine can drain completed descriptors while NAPI waits for RX buffer memory. Fixes: d51b6ce441d3 ("net: ethernet: add ag71xx driver") Signed-off-by: Rosen Penev --- v2: add Fixes: . drivers/net/ethernet/atheros/ag71xx.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/net/ethernet/atheros/ag71xx.c b/drivers/net/ethernet/atheros/ag71xx.c index d93fd91ff884..5a33759be3cf 100644 --- a/drivers/net/ethernet/atheros/ag71xx.c +++ b/drivers/net/ethernet/atheros/ag71xx.c @@ -1746,6 +1746,7 @@ static int ag71xx_poll(struct napi_struct *napi, int limit) mod_timer(&ag->oom_timer, jiffies + AG71XX_OOM_REFILL); napi_complete(napi); + ag71xx_int_enable(ag, AG71XX_INT_TX); return 0; } -- 2.56.0