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Message-Id: <20230323115742.13836-1-cai.huoqing@linux.dev> Date: Thu, 23 Mar 2023 19:57:42 +0800 From: Cai Huoqing <cai.huoqing@...ux.dev> To: cai.huoqing@...ux.dev Cc: Christian Benvenuti <benve@...co.com>, Nelson Escobar <neescoba@...co.com>, Jason Gunthorpe <jgg@...pe.ca>, Leon Romanovsky <leon@...nel.org>, linux-rdma@...r.kernel.org, linux-kernel@...r.kernel.org Subject: [PATCH] RDMA/usnic: Remove redundant pci_clear_master 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@...ux.dev> --- drivers/infiniband/hw/usnic/usnic_ib_main.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/drivers/infiniband/hw/usnic/usnic_ib_main.c b/drivers/infiniband/hw/usnic/usnic_ib_main.c index 46653ad56f5a..13b654ddd3cc 100644 --- a/drivers/infiniband/hw/usnic/usnic_ib_main.c +++ b/drivers/infiniband/hw/usnic/usnic_ib_main.c @@ -602,7 +602,6 @@ static int usnic_ib_pci_probe(struct pci_dev *pdev, usnic_vnic_free(vf->vnic); out_release_regions: pci_set_drvdata(pdev, NULL); - pci_clear_master(pdev); pci_release_regions(pdev); out_disable_device: pci_disable_device(pdev); @@ -623,7 +622,6 @@ static void usnic_ib_pci_remove(struct pci_dev *pdev) kref_put(&pf->vf_cnt, usnic_ib_undiscover_pf); usnic_vnic_free(vf->vnic); pci_set_drvdata(pdev, NULL); - pci_clear_master(pdev); pci_release_regions(pdev); pci_disable_device(pdev); kfree(vf); -- 2.34.1
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