From patchwork Sun Jan 9 18:49:09 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christophe JAILLET X-Patchwork-Id: 12707920 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5C0E9C433FE for ; Sun, 9 Jan 2022 18:49:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236573AbiAIStS (ORCPT ); Sun, 9 Jan 2022 13:49:18 -0500 Received: from smtp04.smtpout.orange.fr ([80.12.242.126]:50760 "EHLO smtp.smtpout.orange.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236555AbiAIStR (ORCPT ); Sun, 9 Jan 2022 13:49:17 -0500 Received: from pop-os.home ([90.11.185.88]) by smtp.orange.fr with ESMTPA id 6dFjnw05LsoWh6dFjnw55C; Sun, 09 Jan 2022 19:49:15 +0100 X-ME-Helo: pop-os.home X-ME-Auth: YWZlNiIxYWMyZDliZWIzOTcwYTEyYzlhMmU3ZiQ1M2U2MzfzZDfyZTMxZTBkMTYyNDBjNDJlZmQ3ZQ== X-ME-Date: Sun, 09 Jan 2022 19:49:15 +0100 X-ME-IP: 90.11.185.88 From: Christophe JAILLET To: GR-Linux-NIC-Dev@marvell.com, "David S. Miller" , Jakub Kicinski Cc: linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org, Christophe JAILLET , netdev@vger.kernel.org Subject: [PATCH] net/qla3xxx: Remove useless DMA-32 fallback configuration Date: Sun, 9 Jan 2022 19:49:09 +0100 Message-Id: <3011689e8c77d49d7e44509d5a8241320ec408c5.1641754134.git.christophe.jaillet@wanadoo.fr> X-Mailer: git-send-email 2.32.0 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org As stated in [1], dma_set_mask() with a 64-bit mask never fails if dev->dma_mask is non-NULL. So, if it fails, the 32 bits case will also fail for the same reason. So, if dma_set_mask_and_coherent() succeeds, 'pci_using_dac' is known to be 1. Simplify code and remove some dead code accordingly. [1]: https://lkml.org/lkml/2021/6/7/398 Signed-off-by: Christophe JAILLET --- This patch was not part of the 1st serie I've sent. So there is no Reviewed-by tag. --- drivers/net/ethernet/qlogic/qla3xxx.c | 11 +++-------- 1 file changed, 3 insertions(+), 8 deletions(-) diff --git a/drivers/net/ethernet/qlogic/qla3xxx.c b/drivers/net/ethernet/qlogic/qla3xxx.c index 71523d747e93..b30589a135c2 100644 --- a/drivers/net/ethernet/qlogic/qla3xxx.c +++ b/drivers/net/ethernet/qlogic/qla3xxx.c @@ -3750,7 +3750,7 @@ static int ql3xxx_probe(struct pci_dev *pdev, struct net_device *ndev = NULL; struct ql3_adapter *qdev = NULL; static int cards_found; - int pci_using_dac, err; + int err; err = pci_enable_device(pdev); if (err) { @@ -3766,11 +3766,7 @@ static int ql3xxx_probe(struct pci_dev *pdev, pci_set_master(pdev); - if (!dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64))) - pci_using_dac = 1; - else if (!(err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)))) - pci_using_dac = 0; - + err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); if (err) { pr_err("%s no usable DMA configuration\n", pci_name(pdev)); goto err_out_free_regions; @@ -3797,8 +3793,7 @@ static int ql3xxx_probe(struct pci_dev *pdev, qdev->msg_enable = netif_msg_init(debug, default_msg); - if (pci_using_dac) - ndev->features |= NETIF_F_HIGHDMA; + ndev->features |= NETIF_F_HIGHDMA; if (qdev->device_id == QL3032_DEVICE_ID) ndev->features |= NETIF_F_IP_CSUM | NETIF_F_SG;