From patchwork Sun Jan 2 09:20:05 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christophe JAILLET X-Patchwork-Id: 12702186 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 83B69C433F5 for ; Sun, 2 Jan 2022 09:20:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231910AbiABJUK (ORCPT ); Sun, 2 Jan 2022 04:20:10 -0500 Received: from smtp02.smtpout.orange.fr ([80.12.242.124]:53614 "EHLO smtp.smtpout.orange.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231438AbiABJUK (ORCPT ); Sun, 2 Jan 2022 04:20:10 -0500 Received: from pop-os.home ([86.243.171.122]) by smtp.orange.fr with ESMTPA id 3x26n7NltS9NT3x27nETjb; Sun, 02 Jan 2022 10:20:08 +0100 X-ME-Helo: pop-os.home X-ME-Auth: YWZlNiIxYWMyZDliZWIzOTcwYTEyYzlhMmU3ZiQ1M2U2MzfzZDfyZTMxZTBkMTYyNDBjNDJlZmQ3ZQ== X-ME-Date: Sun, 02 Jan 2022 10:20:08 +0100 X-ME-IP: 86.243.171.122 From: Christophe JAILLET To: aelior@marvell.com, manishc@marvell.com, davem@davemloft.net, kuba@kernel.org Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org, Christophe JAILLET Subject: [PATCH] qed: Use dma_set_mask_and_coherent() and simplify code Date: Sun, 2 Jan 2022 10:20:05 +0100 Message-Id: <40af8d810ef06bb10f45e54a61494b5c42038841.1641115135.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 Use dma_set_mask_and_coherent() instead of unrolling it with some dma_set_mask()+dma_set_coherent_mask(). Moreover, as stated in [1], dma_set_mask() with a 64-bit mask will never fail if dev->dma_mask is non-NULL. So, if it fails, the 32 bits case will also fail for the same reason. Simplify code and remove some dead code accordingly. Now that qed_set_coherency_mask() is mostly a single call to dma_set_mask_and_coherent(), fold it in its only caller. [1]: https://lkml.org/lkml/2021/6/7/398 Signed-off-by: Christophe JAILLET --- drivers/net/ethernet/qlogic/qed/qed_main.c | 28 ++++------------------ 1 file changed, 5 insertions(+), 23 deletions(-) diff --git a/drivers/net/ethernet/qlogic/qed/qed_main.c b/drivers/net/ethernet/qlogic/qed/qed_main.c index 46d4207f22a3..c5003fa1a25e 100644 --- a/drivers/net/ethernet/qlogic/qed/qed_main.c +++ b/drivers/net/ethernet/qlogic/qed/qed_main.c @@ -255,27 +255,6 @@ static void __exit qed_exit(void) } module_exit(qed_exit); -/* Check if the DMA controller on the machine can properly handle the DMA - * addressing required by the device. - */ -static int qed_set_coherency_mask(struct qed_dev *cdev) -{ - struct device *dev = &cdev->pdev->dev; - - if (dma_set_mask(dev, DMA_BIT_MASK(64)) == 0) { - if (dma_set_coherent_mask(dev, DMA_BIT_MASK(64)) != 0) { - DP_NOTICE(cdev, - "Can't request 64-bit consistent allocations\n"); - return -EIO; - } - } else if (dma_set_mask(dev, DMA_BIT_MASK(32)) != 0) { - DP_NOTICE(cdev, "Can't request 64b/32b DMA addresses\n"); - return -EIO; - } - - return 0; -} - static void qed_free_pci(struct qed_dev *cdev) { struct pci_dev *pdev = cdev->pdev; @@ -351,9 +330,12 @@ static int qed_init_pci(struct qed_dev *cdev, struct pci_dev *pdev) if (IS_PF(cdev) && !cdev->pci_params.pm_cap) DP_NOTICE(cdev, "Cannot find power management capability\n"); - rc = qed_set_coherency_mask(cdev); - if (rc) + rc = dma_set_mask_and_coherent(&cdev->pdev->dev, DMA_BIT_MASK(64)); + if (rc) { + DP_NOTICE(cdev, "Can't request DMA addresses\n"); + rc = -EIO; goto err2; + } cdev->pci_params.mem_start = pci_resource_start(pdev, 0); cdev->pci_params.mem_end = pci_resource_end(pdev, 0);