From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id DAAE3C7618F for ; Mon, 15 Jul 2019 14:10:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B09C721530 for ; Mon, 15 Jul 2019 14:10:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1563199818; bh=LaQblhdiV7y0KVA9JzhqcAZ/O1ITWftSFhPSvbzR3lI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=gz3S6oOKKSJmT2ggL63dCLTdg4AqQM1QMScq9V38lHbXIYSnNvEAoGJvGCIPcPMru HYRa+rwVw1r5Hln5d7CGjtwhgyzMDL1rQ4nyrzfKMKKECBfntZXDzNKC2Zr0eZIe6v 6S1a4+pQC5rxms85Xu0pG+sbFo4uKdhaBUk5xvoI= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388586AbfGOOKN (ORCPT ); Mon, 15 Jul 2019 10:10:13 -0400 Received: from mail.kernel.org ([198.145.29.99]:36468 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388061AbfGOOKG (ORCPT ); Mon, 15 Jul 2019 10:10:06 -0400 Received: from sasha-vm.mshome.net (unknown [73.61.17.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id AA88E2081C; Mon, 15 Jul 2019 14:10:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1563199805; bh=LaQblhdiV7y0KVA9JzhqcAZ/O1ITWftSFhPSvbzR3lI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=a22VD5DhqzTsPRnw1HzfTbqh2FoPR3pLOohjm6TooRdD2/N/Ai5H6R8dOfrI/iqXA rer2QAryn/AjUt4fdRbzEtyiOnn9+ueGVCAu4fYPCLcZmj1lJVEiuzTs2trgNhr/Cz Uz2erWjNJht63oMM5TMcuzhvcY6PjXGEiVARUgfY= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Ilias Apalodimas , Ard Biesheuvel , "David S . Miller" , Sasha Levin , netdev@vger.kernel.org Subject: [PATCH AUTOSEL 5.1 111/219] net: netsec: initialize tx ring on ndo_open Date: Mon, 15 Jul 2019 10:01:52 -0400 Message-Id: <20190715140341.6443-111-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190715140341.6443-1-sashal@kernel.org> References: <20190715140341.6443-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Ilias Apalodimas [ Upstream commit 39e3622edeffa63c2871153d8743c5825b139968 ] Since we changed the Tx ring handling and now depends on bit31 to figure out the owner of the descriptor, we should initialize this every time the device goes down-up instead of doing it once on driver init. If the value is not correctly initialized the device won't have any available descriptors Changes since v1: - Typo fixes Fixes: 35e07d234739 ("net: socionext: remove mmio reads on Tx") Signed-off-by: Ilias Apalodimas Acked-by: Ard Biesheuvel Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/ethernet/socionext/netsec.c | 32 ++++++++++++++----------- 1 file changed, 18 insertions(+), 14 deletions(-) diff --git a/drivers/net/ethernet/socionext/netsec.c b/drivers/net/ethernet/socionext/netsec.c index cba5881b2746..a10ef700f16d 100644 --- a/drivers/net/ethernet/socionext/netsec.c +++ b/drivers/net/ethernet/socionext/netsec.c @@ -1029,7 +1029,6 @@ static void netsec_free_dring(struct netsec_priv *priv, int id) static int netsec_alloc_dring(struct netsec_priv *priv, enum ring_id id) { struct netsec_desc_ring *dring = &priv->desc_ring[id]; - int i; dring->vaddr = dma_alloc_coherent(priv->dev, DESC_SZ * DESC_NUM, &dring->desc_dma, GFP_KERNEL); @@ -1040,19 +1039,6 @@ static int netsec_alloc_dring(struct netsec_priv *priv, enum ring_id id) if (!dring->desc) goto err; - if (id == NETSEC_RING_TX) { - for (i = 0; i < DESC_NUM; i++) { - struct netsec_de *de; - - de = dring->vaddr + (DESC_SZ * i); - /* de->attr is not going to be accessed by the NIC - * until netsec_set_tx_de() is called. - * No need for a dma_wmb() here - */ - de->attr = 1U << NETSEC_TX_SHIFT_OWN_FIELD; - } - } - return 0; err: netsec_free_dring(priv, id); @@ -1060,6 +1046,23 @@ static int netsec_alloc_dring(struct netsec_priv *priv, enum ring_id id) return -ENOMEM; } +static void netsec_setup_tx_dring(struct netsec_priv *priv) +{ + struct netsec_desc_ring *dring = &priv->desc_ring[NETSEC_RING_TX]; + int i; + + for (i = 0; i < DESC_NUM; i++) { + struct netsec_de *de; + + de = dring->vaddr + (DESC_SZ * i); + /* de->attr is not going to be accessed by the NIC + * until netsec_set_tx_de() is called. + * No need for a dma_wmb() here + */ + de->attr = 1U << NETSEC_TX_SHIFT_OWN_FIELD; + } +} + static int netsec_setup_rx_dring(struct netsec_priv *priv) { struct netsec_desc_ring *dring = &priv->desc_ring[NETSEC_RING_RX]; @@ -1361,6 +1364,7 @@ static int netsec_netdev_open(struct net_device *ndev) pm_runtime_get_sync(priv->dev); + netsec_setup_tx_dring(priv); ret = netsec_setup_rx_dring(priv); if (ret) { netif_err(priv, probe, priv->ndev, -- 2.20.1