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From:   Cai Huoqing <cai.huoqing@linux.dev>
To:     cai.huoqing@linux.dev
Cc:     Derek Chickles <dchickles@marvell.com>,
        Satanand Burla <sburla@marvell.com>,
        Felix Manlunas <fmanlunas@marvell.com>,
        "David S. Miller" <davem@davemloft.net>,
        Eric Dumazet <edumazet@google.com>,
        Jakub Kicinski <kuba@kernel.org>,
        Paolo Abeni <pabeni@redhat.com>,
        Raju Rangoju <rajur@chelsio.com>,
        Dariusz Marcinkiewicz <reksio@newterm.pl>,
        Dimitris Michailidis <dmichail@fungible.com>,
        Yisen Zhuang <yisen.zhuang@huawei.com>,
        Salil Mehta <salil.mehta@huawei.com>,
        Saeed Mahameed <saeedm@nvidia.com>,
        Leon Romanovsky <leon@kernel.org>,
        "K. Y. Srinivasan" <kys@microsoft.com>,
        Haiyang Zhang <haiyangz@microsoft.com>,
        Wei Liu <wei.liu@kernel.org>, Dexuan Cui <decui@microsoft.com>,
        Shannon Nelson <shannon.nelson@amd.com>,
        Brett Creeley <brett.creeley@amd.com>, drivers@pensando.io,
        Jesse Brandeburg <jesse.brandeburg@intel.com>,
        Bjorn Helgaas <bhelgaas@google.com>,
        Guangbin Huang <huangguangbin2@huawei.com>,
        Jian Shen <shenjian15@huawei.com>, Hao Lan <lanhao@huawei.com>,
        Jie Wang <wangjie125@huawei.com>,
        Long Li <longli@microsoft.com>, Jiri Pirko <jiri@resnulli.us>,
        netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-rdma@vger.kernel.org, linux-hyperv@vger.kernel.org
Subject: [PATCH 2/8] net: hisilicon: Remove redundant pci_clear_master
Date:   Thu, 23 Mar 2023 17:03:01 +0800
Message-Id: <20230323090314.22431-2-cai.huoqing@linux.dev>
In-Reply-To: <20230323090314.22431-1-cai.huoqing@linux.dev>
References: <20230323090314.22431-1-cai.huoqing@linux.dev>
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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 <cai.huoqing@linux.dev>
---
 drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c   | 7 ++-----
 drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c | 6 ++----
 2 files changed, 4 insertions(+), 9 deletions(-)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
index 07ad5f35219e..c3851a6e10c0 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
@@ -11365,7 +11365,7 @@ static int hclge_pci_init(struct hclge_dev *hdev)
 	if (!hw->hw.io_base) {
 		dev_err(&pdev->dev, "Can't map configuration register space\n");
 		ret = -ENOMEM;
-		goto err_clr_master;
+		goto err_release_regions;
 	}
 
 	ret = hclge_dev_mem_map(hdev);
@@ -11378,8 +11378,7 @@ static int hclge_pci_init(struct hclge_dev *hdev)
 
 err_unmap_io_base:
 	pcim_iounmap(pdev, hdev->hw.hw.io_base);
-err_clr_master:
-	pci_clear_master(pdev);
+err_release_regions:
 	pci_release_regions(pdev);
 err_disable_device:
 	pci_disable_device(pdev);
@@ -11396,7 +11395,6 @@ static void hclge_pci_uninit(struct hclge_dev *hdev)
 
 	pcim_iounmap(pdev, hdev->hw.hw.io_base);
 	pci_free_irq_vectors(pdev);
-	pci_clear_master(pdev);
 	pci_release_mem_regions(pdev);
 	pci_disable_device(pdev);
 }
@@ -11743,7 +11741,6 @@ static int hclge_init_ae_dev(struct hnae3_ae_dev *ae_dev)
 	hclge_devlink_uninit(hdev);
 err_pci_uninit:
 	pcim_iounmap(pdev, hdev->hw.hw.io_base);
-	pci_clear_master(pdev);
 	pci_release_regions(pdev);
 	pci_disable_device(pdev);
 out:
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c b/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c
index e84e5be8e59e..f24046250341 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c
@@ -2598,7 +2598,7 @@ static int hclgevf_pci_init(struct hclgevf_dev *hdev)
 	if (!hw->hw.io_base) {
 		dev_err(&pdev->dev, "can't map configuration register space\n");
 		ret = -ENOMEM;
-		goto err_clr_master;
+		goto err_release_regions;
 	}
 
 	ret = hclgevf_dev_mem_map(hdev);
@@ -2609,8 +2609,7 @@ static int hclgevf_pci_init(struct hclgevf_dev *hdev)
 
 err_unmap_io_base:
 	pci_iounmap(pdev, hdev->hw.hw.io_base);
-err_clr_master:
-	pci_clear_master(pdev);
+err_release_regions:
 	pci_release_regions(pdev);
 err_disable_device:
 	pci_disable_device(pdev);
@@ -2626,7 +2625,6 @@ static void hclgevf_pci_uninit(struct hclgevf_dev *hdev)
 		devm_iounmap(&pdev->dev, hdev->hw.hw.mem_base);
 
 	pci_iounmap(pdev, hdev->hw.hw.io_base);
-	pci_clear_master(pdev);
 	pci_release_regions(pdev);
 	pci_disable_device(pdev);
 }
-- 
2.34.1