From patchwork Tue Mar 26 08:37:39 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Paul Barker X-Patchwork-Id: 13603675 X-Patchwork-Delegate: geert@linux-m68k.org Received: from relmlie5.idc.renesas.com (relmlor1.renesas.com [210.160.252.171]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 6C69E2114; Tue, 26 Mar 2024 08:38:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=210.160.252.171 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711442291; cv=none; b=r4EpK2EZRa3YHN/TmTzPxWmNU8yfkVEhxi3BlVFxFT/Dvb3+CYqz82hPkxr0zs+bojbjLJtcdqXgz0Eq8m/msv6kK21Hy14okMQ/7yoA7yOVCChP5ge23SinMLqs2xevfrv8/ieY4SJvYMCU8Wo+Ta3ukZ/XqO+FrB2OyNMM1hg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711442291; c=relaxed/simple; bh=zRSQJ6WGPCwUjhMT+4T16q3Tfzhz94Gd+n+XYSLM2Yg=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=XknMReWL/LSkpzZRnPg6cbBfBKbE+oCjQwBPAMMhfaQynWW+QFB9in/QfH8wors8NY+95OCF1PDTmVEWT+6POACNE78KyDltyd7DCtY88LXDjHSock4E69YdzHBFLsV8yzM+WQG62+ezeXO/mPbPlcMEIwTwfnweXZ0gxmH97BY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=bp.renesas.com; spf=pass smtp.mailfrom=bp.renesas.com; arc=none smtp.client-ip=210.160.252.171 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=bp.renesas.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bp.renesas.com X-IronPort-AV: E=Sophos;i="6.07,155,1708354800"; d="scan'208";a="199297022" Received: from unknown (HELO relmlir5.idc.renesas.com) ([10.200.68.151]) by relmlie5.idc.renesas.com with ESMTP; 26 Mar 2024 17:38:07 +0900 Received: from renesas-deb12.mshome.net (unknown [10.226.92.201]) by relmlir5.idc.renesas.com (Postfix) with ESMTP id B9CB24006DEF; Tue, 26 Mar 2024 17:38:03 +0900 (JST) From: Paul Barker To: Sergey Shtylyov , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni Cc: Paul Barker , =?utf-8?q?Niklas_S=C3=B6der?= =?utf-8?q?lund?= , netdev@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 1/2] net: ravb: Always process TX descriptor ring Date: Tue, 26 Mar 2024 08:37:39 +0000 Message-Id: <20240326083740.23364-1-paul.barker.ct@bp.renesas.com> X-Mailer: git-send-email 2.39.2 Precedence: bulk X-Mailing-List: linux-renesas-soc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 The TX queue should be serviced each time the poll function is called, even if the full RX work budget has been consumed. This prevents starvation of the TX queue when RX bandwidth usage is high. Fixes: a0d2f20650e8 ("Renesas Ethernet AVB PTP clock driver") Signed-off-by: Paul Barker --- drivers/net/ethernet/renesas/ravb_main.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) base-commit: 4cece764965020c22cff7665b18a012006359095 diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c index d1be030c8848..4f98e4e2badb 100644 --- a/drivers/net/ethernet/renesas/ravb_main.c +++ b/drivers/net/ethernet/renesas/ravb_main.c @@ -1324,12 +1324,12 @@ static int ravb_poll(struct napi_struct *napi, int budget) int q = napi - priv->napi; int mask = BIT(q); int quota = budget; + bool rearm = true; /* Processing RX Descriptor Ring */ /* Clear RX interrupt */ ravb_write(ndev, ~(mask | RIS0_RESERVED), RIS0); - if (ravb_rx(ndev, "a, q)) - goto out; + rearm = !ravb_rx(ndev, "a, q); /* Processing TX Descriptor Ring */ spin_lock_irqsave(&priv->lock, flags); @@ -1339,6 +1339,9 @@ static int ravb_poll(struct napi_struct *napi, int budget) netif_wake_subqueue(ndev, q); spin_unlock_irqrestore(&priv->lock, flags); + if (!rearm) + goto out; + napi_complete(napi); /* Re-enable RX/TX interrupts */