From patchwork Sun Jan 9 15:50:19 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christophe JAILLET X-Patchwork-Id: 12707820 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 7790EC433F5 for ; Sun, 9 Jan 2022 15:50:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235936AbiAIPua (ORCPT ); Sun, 9 Jan 2022 10:50:30 -0500 Received: from smtp03.smtpout.orange.fr ([80.12.242.125]:65149 "EHLO smtp.smtpout.orange.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230135AbiAIPu3 (ORCPT ); Sun, 9 Jan 2022 10:50:29 -0500 Received: from pop-os.home ([90.11.185.88]) by smtp.orange.fr with ESMTPA id 6aShnj1ubIEdl6aShnROx1; Sun, 09 Jan 2022 16:50:28 +0100 X-ME-Helo: pop-os.home X-ME-Auth: YWZlNiIxYWMyZDliZWIzOTcwYTEyYzlhMmU3ZiQ1M2U2MzfzZDfyZTMxZTBkMTYyNDBjNDJlZmQ3ZQ== X-ME-Date: Sun, 09 Jan 2022 16:50:28 +0100 X-ME-IP: 90.11.185.88 From: Christophe JAILLET To: Bryan Whitehead , UNGLinuxDriver@microchip.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] lan743x: Remove useless DMA-32 fallback configuration Date: Sun, 9 Jan 2022 16:50:19 +0100 Message-Id: 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. Simplify code and remove some dead code accordingly. [1]: https://lkml.org/lkml/2021/6/7/398 Signed-off-by: Christophe JAILLET --- drivers/net/ethernet/microchip/lan743x_main.c | 22 +++++++------------ 1 file changed, 8 insertions(+), 14 deletions(-) diff --git a/drivers/net/ethernet/microchip/lan743x_main.c b/drivers/net/ethernet/microchip/lan743x_main.c index 7d7647481f70..8c6390d95158 100644 --- a/drivers/net/ethernet/microchip/lan743x_main.c +++ b/drivers/net/ethernet/microchip/lan743x_main.c @@ -1739,13 +1739,10 @@ static int lan743x_tx_ring_init(struct lan743x_tx *tx) } if (dma_set_mask_and_coherent(&tx->adapter->pdev->dev, DMA_BIT_MASK(64))) { - if (dma_set_mask_and_coherent(&tx->adapter->pdev->dev, - DMA_BIT_MASK(32))) { - dev_warn(&tx->adapter->pdev->dev, - "lan743x_: No suitable DMA available\n"); - ret = -ENOMEM; - goto cleanup; - } + dev_warn(&tx->adapter->pdev->dev, + "lan743x_: No suitable DMA available\n"); + ret = -ENOMEM; + goto cleanup; } ring_allocation_size = ALIGN(tx->ring_size * sizeof(struct lan743x_tx_descriptor), @@ -2284,13 +2281,10 @@ static int lan743x_rx_ring_init(struct lan743x_rx *rx) } if (dma_set_mask_and_coherent(&rx->adapter->pdev->dev, DMA_BIT_MASK(64))) { - if (dma_set_mask_and_coherent(&rx->adapter->pdev->dev, - DMA_BIT_MASK(32))) { - dev_warn(&rx->adapter->pdev->dev, - "lan743x_: No suitable DMA available\n"); - ret = -ENOMEM; - goto cleanup; - } + dev_warn(&rx->adapter->pdev->dev, + "lan743x_: No suitable DMA available\n"); + ret = -ENOMEM; + goto cleanup; } ring_allocation_size = ALIGN(rx->ring_size * sizeof(struct lan743x_rx_descriptor),