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Message-ID: <20230817025709.2023553-1-liaoyu15@huawei.com> Date: Thu, 17 Aug 2023 10:57:09 +0800 From: Yu Liao <liaoyu15@...wei.com> To: <netdev@...r.kernel.org>, <davem@...emloft.net>, <edumazet@...gle.com>, <kuba@...nel.org>, <pabeni@...hat.com>, <leon@...nel.org>, <shannon.nelson@....com> CC: <liaoyu15@...wei.com>, <liwei391@...wei.com> Subject: [PATCH v2 net-next] pds_core: remove redundant pci_clear_master() do_pci_disable_device() disable PCI bus-mastering as following: 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 pci_disable_device() sets dev->is_busmaster to 0. pci_enable_device() is called only once before calling to pci_disable_device() and such pci_clear_master() is not needed. So remove redundant pci_clear_master(). Also rename goto label 'err_out_clear_master' to 'err_out_disable_device'. Signed-off-by: Yu Liao <liaoyu15@...wei.com> --- v1 -> v2: - add explanation why pci_disable_device() disables PCI bus-mastering - rename goto label 'err_out_clear_master' to 'err_out_disable_device' --- drivers/net/ethernet/amd/pds_core/main.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/drivers/net/ethernet/amd/pds_core/main.c b/drivers/net/ethernet/amd/pds_core/main.c index 672757932246..3a45bf474a19 100644 --- a/drivers/net/ethernet/amd/pds_core/main.c +++ b/drivers/net/ethernet/amd/pds_core/main.c @@ -367,14 +367,13 @@ static int pdsc_probe(struct pci_dev *pdev, const struct pci_device_id *ent) err = pdsc_init_vf(pdsc); if (err) { dev_err(dev, "Cannot init device: %pe\n", ERR_PTR(err)); - goto err_out_clear_master; + goto err_out_disable_device; } clear_bit(PDSC_S_INITING_DRIVER, &pdsc->state); return 0; -err_out_clear_master: - pci_clear_master(pdev); +err_out_disable_device: pci_disable_device(pdev); err_out_free_ida: ida_free(&pdsc_ida, pdsc->uid); @@ -439,7 +438,6 @@ static void pdsc_remove(struct pci_dev *pdev) pci_release_regions(pdev); } - pci_clear_master(pdev); pci_disable_device(pdev); ida_free(&pdsc_ida, pdsc->uid); -- 2.25.1
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