From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out-1.mta1.migadu.com (out-1.mta1.migadu.com [95.215.58.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6193119F for ; Thu, 23 Mar 2023 11:53:43 +0000 (UTC) X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1679572421; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=e28/Aphzssb7x3wtsuVlhO9EMFot1z8DPyozyjw+aCs=; b=TuLVwMlPfRTu/gRt3GON+vXtXxPXWLk3U7HM1L2Aw4Q7lzZJ2A/xGInpNXmkW4T3vHvMC4 2j5LSzHo2XPKRipGBtjKRFmWmD3GYH1+9XEOADOXkBBUxC8JfbxXvxbDAAviO686tyejSX 94ket3Yl5552HzttE+aQ4IG845aaR9k= From: Cai Huoqing To: cai.huoqing@linux.dev Cc: Sanjay R Mehta , Shyam Sundar S K , Jon Mason , Dave Jiang , Allen Hubbe , Frank Li , ntb@lists.linux.dev, linux-kernel@vger.kernel.org Subject: [PATCH 1/3] ntb_hw_amd: Remove redundant pci_clear_master Date: Thu, 23 Mar 2023 19:53:33 +0800 Message-Id: <20230323115336.12986-1-cai.huoqing@linux.dev> Precedence: bulk X-Mailing-List: ntb@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT Remove pci_clear_master to simplify the code, the bus-mastering is also cleared in do_pci_disable_device, like this: ./drivers/pci/pci.c:2197 static void do_pci_disable_device(struct pci_dev *dev) { u16 pci_command; pci_read_config_word(dev, PCI_COMMAND, &pci_command); if (pci_command & PCI_COMMAND_MASTER) { pci_command &= ~PCI_COMMAND_MASTER; pci_write_config_word(dev, PCI_COMMAND, pci_command); } pcibios_disable_device(dev); }. And dev->is_busmaster is set to 0 in pci_disable_device. Signed-off-by: Cai Huoqing --- drivers/ntb/hw/amd/ntb_hw_amd.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/drivers/ntb/hw/amd/ntb_hw_amd.c b/drivers/ntb/hw/amd/ntb_hw_amd.c index 730f2103b91d..855ff65f64a5 100644 --- a/drivers/ntb/hw/amd/ntb_hw_amd.c +++ b/drivers/ntb/hw/amd/ntb_hw_amd.c @@ -1194,7 +1194,6 @@ static int amd_ntb_init_pci(struct amd_ntb_dev *ndev, return 0; err_dma_mask: - pci_clear_master(pdev); pci_release_regions(pdev); err_pci_regions: pci_disable_device(pdev); @@ -1209,7 +1208,6 @@ static void amd_ntb_deinit_pci(struct amd_ntb_dev *ndev) pci_iounmap(pdev, ndev->self_mmio); - pci_clear_master(pdev); pci_release_regions(pdev); pci_disable_device(pdev); pci_set_drvdata(pdev, NULL); -- 2.34.1