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(p200300ea8f065500dc43c73546259787.dip0.t-ipconnect.de. [2003:ea:8f06:5500:dc43:c735:4625:9787]) by smtp.googlemail.com with ESMTPSA id z17sm1787291wrh.88.2020.12.09.00.31.33 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 09 Dec 2020 00:31:34 -0800 (PST) From: Heiner Kallweit Subject: [PATCH] PCI: Remove pci_try_set_mwi To: Bjorn Helgaas , Jonathan Corbet , Jens Axboe , Viresh Kumar , Andy Shevchenko , Dan Williams , Vinod Koul , David Miller , Lee Jones , Ion Badulescu , Jakub Kicinski , Lino Sanfilippo , Christian Lamparter , Kalle Valo , Luis Chamberlain , Adam Radford , "James E.J. Bottomley" , "Martin K. Petersen" , James Smart , Dick Kennedy , Nilesh Javali , GR-QLogic-Storage-Upstream@marvell.com, Greg Kroah-Hartman , Jiri Slaby , Peter Chen , Felipe Balbi Cc: "linux-pci@vger.kernel.org" , linux-doc@vger.kernel.org, Linux Kernel Mailing List , linux-ide@vger.kernel.org, dmaengine@vger.kernel.org, "netdev@vger.kernel.org" , linux-parisc@vger.kernel.org, linux-wireless , SCSI development list , linux-serial@vger.kernel.org, Linux USB Mailing List Message-ID: <4d535d35-6c8c-2bd8-812b-2b53194ce0ec@gmail.com> Date: Wed, 9 Dec 2020 09:31:21 +0100 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.5.1 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org pci_set_mwi() and pci_try_set_mwi() do exactly the same, just that the former one is declared as __must_check. However also some callers of pci_set_mwi() have a comment that it's an optional feature. I don't think there's much sense in this separation and the use of __must_check. Therefore remove pci_try_set_mwi() and remove the __must_check attribute from pci_set_mwi(). I don't expect either function to be used in new code anyway. Signed-off-by: Heiner Kallweit --- patch applies on top of pci/misc for v5.11 --- Documentation/PCI/pci.rst | 5 +---- drivers/ata/pata_cs5530.c | 2 +- drivers/ata/sata_mv.c | 2 +- drivers/dma/dw/pci.c | 2 +- drivers/dma/hsu/pci.c | 2 +- drivers/ide/cs5530.c | 2 +- drivers/mfd/intel-lpss-pci.c | 2 +- drivers/net/ethernet/adaptec/starfire.c | 2 +- drivers/net/ethernet/alacritech/slicoss.c | 2 +- drivers/net/ethernet/dec/tulip/tulip_core.c | 5 +---- drivers/net/ethernet/sun/cassini.c | 4 ++-- drivers/net/wireless/intersil/p54/p54pci.c | 2 +- .../intersil/prism54/islpci_hotplug.c | 3 +-- .../wireless/realtek/rtl818x/rtl8180/dev.c | 2 +- drivers/pci/pci.c | 19 ------------------- drivers/scsi/3w-9xxx.c | 4 ++-- drivers/scsi/3w-sas.c | 4 ++-- drivers/scsi/csiostor/csio_init.c | 2 +- drivers/scsi/lpfc/lpfc_init.c | 2 +- drivers/scsi/qla2xxx/qla_init.c | 8 ++++---- drivers/scsi/qla2xxx/qla_mr.c | 2 +- drivers/tty/serial/8250/8250_lpss.c | 2 +- drivers/usb/chipidea/ci_hdrc_pci.c | 2 +- drivers/usb/gadget/udc/amd5536udc_pci.c | 2 +- drivers/usb/gadget/udc/net2280.c | 2 +- drivers/usb/gadget/udc/pch_udc.c | 2 +- include/linux/pci.h | 5 ++--- 27 files changed, 33 insertions(+), 60 deletions(-) diff --git a/Documentation/PCI/pci.rst b/Documentation/PCI/pci.rst index 814b40f83..120362cc9 100644 --- a/Documentation/PCI/pci.rst +++ b/Documentation/PCI/pci.rst @@ -226,10 +226,7 @@ If the PCI device can use the PCI Memory-Write-Invalidate transaction, call pci_set_mwi(). This enables the PCI_COMMAND bit for Mem-Wr-Inval and also ensures that the cache line size register is set correctly. Check the return value of pci_set_mwi() as not all architectures -or chip-sets may support Memory-Write-Invalidate. Alternatively, -if Mem-Wr-Inval would be nice to have but is not required, call -pci_try_set_mwi() to have the system do its best effort at enabling -Mem-Wr-Inval. +or chip-sets may support Memory-Write-Invalidate. Request MMIO/IOP resources diff --git a/drivers/ata/pata_cs5530.c b/drivers/ata/pata_cs5530.c index ad75d02b6..8654b3ae1 100644 --- a/drivers/ata/pata_cs5530.c +++ b/drivers/ata/pata_cs5530.c @@ -214,7 +214,7 @@ static int cs5530_init_chip(void) } pci_set_master(cs5530_0); - pci_try_set_mwi(cs5530_0); + pci_set_mwi(cs5530_0); /* * Set PCI CacheLineSize to 16-bytes: diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c index 664ef658a..ee37755ea 100644 --- a/drivers/ata/sata_mv.c +++ b/drivers/ata/sata_mv.c @@ -4432,7 +4432,7 @@ static int mv_pci_init_one(struct pci_dev *pdev, mv_print_info(host); pci_set_master(pdev); - pci_try_set_mwi(pdev); + pci_set_mwi(pdev); return ata_host_activate(host, pdev->irq, mv_interrupt, IRQF_SHARED, IS_GEN_I(hpriv) ? &mv5_sht : &mv6_sht); } diff --git a/drivers/dma/dw/pci.c b/drivers/dma/dw/pci.c index 1142aa6f8..1c20b7485 100644 --- a/drivers/dma/dw/pci.c +++ b/drivers/dma/dw/pci.c @@ -30,7 +30,7 @@ static int dw_pci_probe(struct pci_dev *pdev, const struct pci_device_id *pid) } pci_set_master(pdev); - pci_try_set_mwi(pdev); + pci_set_mwi(pdev); ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); if (ret) diff --git a/drivers/dma/hsu/pci.c b/drivers/dma/hsu/pci.c index 07cc7320a..420dd3706 100644 --- a/drivers/dma/hsu/pci.c +++ b/drivers/dma/hsu/pci.c @@ -73,7 +73,7 @@ static int hsu_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) } pci_set_master(pdev); - pci_try_set_mwi(pdev); + pci_set_mwi(pdev); ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); if (ret) diff --git a/drivers/ide/cs5530.c b/drivers/ide/cs5530.c index 5bb46e713..5d2c421ab 100644 --- a/drivers/ide/cs5530.c +++ b/drivers/ide/cs5530.c @@ -168,7 +168,7 @@ static int init_chipset_cs5530(struct pci_dev *dev) */ pci_set_master(cs5530_0); - pci_try_set_mwi(cs5530_0); + pci_set_mwi(cs5530_0); /* * Set PCI CacheLineSize to 16-bytes: diff --git a/drivers/mfd/intel-lpss-pci.c b/drivers/mfd/intel-lpss-pci.c index 2d7c588ef..a0c3be750 100644 --- a/drivers/mfd/intel-lpss-pci.c +++ b/drivers/mfd/intel-lpss-pci.c @@ -39,7 +39,7 @@ static int intel_lpss_pci_probe(struct pci_dev *pdev, /* Probably it is enough to set this for iDMA capable devices only */ pci_set_master(pdev); - pci_try_set_mwi(pdev); + pci_set_mwi(pdev); ret = intel_lpss_probe(&pdev->dev, info); if (ret) diff --git a/drivers/net/ethernet/adaptec/starfire.c b/drivers/net/ethernet/adaptec/starfire.c index 555299737..1dbff34c4 100644 --- a/drivers/net/ethernet/adaptec/starfire.c +++ b/drivers/net/ethernet/adaptec/starfire.c @@ -679,7 +679,7 @@ static int starfire_init_one(struct pci_dev *pdev, pci_set_master(pdev); /* enable MWI -- it vastly improves Rx performance on sparc64 */ - pci_try_set_mwi(pdev); + pci_set_mwi(pdev); #ifdef ZEROCOPY /* Starfire can do TCP/UDP checksumming */ diff --git a/drivers/net/ethernet/alacritech/slicoss.c b/drivers/net/ethernet/alacritech/slicoss.c index 696517eae..544510f57 100644 --- a/drivers/net/ethernet/alacritech/slicoss.c +++ b/drivers/net/ethernet/alacritech/slicoss.c @@ -1749,7 +1749,7 @@ static int slic_probe(struct pci_dev *pdev, const struct pci_device_id *ent) } pci_set_master(pdev); - pci_try_set_mwi(pdev); + pci_set_mwi(pdev); slic_configure_pci(pdev); diff --git a/drivers/net/ethernet/dec/tulip/tulip_core.c b/drivers/net/ethernet/dec/tulip/tulip_core.c index c1dcd6ca1..4f6debb24 100644 --- a/drivers/net/ethernet/dec/tulip/tulip_core.c +++ b/drivers/net/ethernet/dec/tulip/tulip_core.c @@ -1193,10 +1193,7 @@ static void tulip_mwi_config(struct pci_dev *pdev, struct net_device *dev) /* if we have any cache line size at all, we can do MRM and MWI */ csr0 |= MRM | MWI; - /* Enable MWI in the standard PCI command bit. - * Check for the case where MWI is desired but not available - */ - pci_try_set_mwi(pdev); + pci_set_mwi(pdev); /* read result from hardware (in case bit refused to enable) */ pci_read_config_word(pdev, PCI_COMMAND, &pci_command); diff --git a/drivers/net/ethernet/sun/cassini.c b/drivers/net/ethernet/sun/cassini.c index 9ff894ba8..9a95ec989 100644 --- a/drivers/net/ethernet/sun/cassini.c +++ b/drivers/net/ethernet/sun/cassini.c @@ -4933,14 +4933,14 @@ static int cas_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) pci_cmd &= ~PCI_COMMAND_SERR; pci_cmd |= PCI_COMMAND_PARITY; pci_write_config_word(pdev, PCI_COMMAND, pci_cmd); - if (pci_try_set_mwi(pdev)) + if (pci_set_mwi(pdev)) pr_warn("Could not enable MWI for %s\n", pci_name(pdev)); cas_program_bridge(pdev); /* * On some architectures, the default cache line size set - * by pci_try_set_mwi reduces perforamnce. We have to increase + * by pci_set_mwi reduces performance. We have to increase * it for this case. To start, we'll print some configuration * data. */ diff --git a/drivers/net/wireless/intersil/p54/p54pci.c b/drivers/net/wireless/intersil/p54/p54pci.c index e97ee547b..c76326d1e 100644 --- a/drivers/net/wireless/intersil/p54/p54pci.c +++ b/drivers/net/wireless/intersil/p54/p54pci.c @@ -583,7 +583,7 @@ static int p54p_probe(struct pci_dev *pdev, } pci_set_master(pdev); - pci_try_set_mwi(pdev); + pci_set_mwi(pdev); pci_write_config_byte(pdev, 0x40, 0); pci_write_config_byte(pdev, 0x41, 0); diff --git a/drivers/net/wireless/intersil/prism54/islpci_hotplug.c b/drivers/net/wireless/intersil/prism54/islpci_hotplug.c index 31a1e6132..e8087d9a5 100644 --- a/drivers/net/wireless/intersil/prism54/islpci_hotplug.c +++ b/drivers/net/wireless/intersil/prism54/islpci_hotplug.c @@ -153,8 +153,7 @@ prism54_probe(struct pci_dev *pdev, const struct pci_device_id *id) DEBUG(SHOW_TRACING, "%s: pci_set_master(pdev)\n", DRV_NAME); pci_set_master(pdev); - /* enable MWI */ - pci_try_set_mwi(pdev); + pci_set_mwi(pdev); /* setup the network device interface and its structure */ if (!(ndev = islpci_setup(pdev))) { diff --git a/drivers/net/wireless/realtek/rtl818x/rtl8180/dev.c b/drivers/net/wireless/realtek/rtl818x/rtl8180/dev.c index 2477e18c7..b259b0b58 100644 --- a/drivers/net/wireless/realtek/rtl818x/rtl8180/dev.c +++ b/drivers/net/wireless/realtek/rtl818x/rtl8180/dev.c @@ -1871,7 +1871,7 @@ static int rtl8180_probe(struct pci_dev *pdev, if (priv->chip_family != RTL818X_CHIP_FAMILY_RTL8180) { priv->band.n_bitrates = ARRAY_SIZE(rtl818x_rates); - pci_try_set_mwi(pdev); + pci_set_mwi(pdev); } if (priv->chip_family != RTL818X_CHIP_FAMILY_RTL8180) diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 9a5500287..f0ab432d2 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -4389,25 +4389,6 @@ int pcim_set_mwi(struct pci_dev *dev) } EXPORT_SYMBOL(pcim_set_mwi); -/** - * pci_try_set_mwi - enables memory-write-invalidate PCI transaction - * @dev: the PCI device for which MWI is enabled - * - * Enables the Memory-Write-Invalidate transaction in %PCI_COMMAND. - * Callers are not required to check the return value. - * - * RETURNS: An appropriate -ERRNO error value on error, or zero for success. - */ -int pci_try_set_mwi(struct pci_dev *dev) -{ -#ifdef PCI_DISABLE_MWI - return 0; -#else - return pci_set_mwi(dev); -#endif -} -EXPORT_SYMBOL(pci_try_set_mwi); - /** * pci_clear_mwi - disables Memory-Write-Invalidate for device dev * @dev: the PCI device to disable diff --git a/drivers/scsi/3w-9xxx.c b/drivers/scsi/3w-9xxx.c index b4718a1b2..d869485e2 100644 --- a/drivers/scsi/3w-9xxx.c +++ b/drivers/scsi/3w-9xxx.c @@ -2018,7 +2018,7 @@ static int twa_probe(struct pci_dev *pdev, const struct pci_device_id *dev_id) } pci_set_master(pdev); - pci_try_set_mwi(pdev); + pci_set_mwi(pdev); retval = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); if (retval) @@ -2227,7 +2227,7 @@ static int __maybe_unused twa_resume(struct device *dev) printk(KERN_WARNING "3w-9xxx: Resuming host %d.\n", tw_dev->host->host_no); - pci_try_set_mwi(pdev); + pci_set_mwi(pdev); retval = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); if (retval) diff --git a/drivers/scsi/3w-sas.c b/drivers/scsi/3w-sas.c index b8f1848ec..49ca153b8 100644 --- a/drivers/scsi/3w-sas.c +++ b/drivers/scsi/3w-sas.c @@ -1571,7 +1571,7 @@ static int twl_probe(struct pci_dev *pdev, const struct pci_device_id *dev_id) } pci_set_master(pdev); - pci_try_set_mwi(pdev); + pci_set_mwi(pdev); retval = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); if (retval) @@ -1790,7 +1790,7 @@ static int __maybe_unused twl_resume(struct device *dev) TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata; printk(KERN_WARNING "3w-sas: Resuming host %d.\n", tw_dev->host->host_no); - pci_try_set_mwi(pdev); + pci_set_mwi(pdev); retval = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); if (retval) diff --git a/drivers/scsi/csiostor/csio_init.c b/drivers/scsi/csiostor/csio_init.c index 390b07bf9..c20bf44c6 100644 --- a/drivers/scsi/csiostor/csio_init.c +++ b/drivers/scsi/csiostor/csio_init.c @@ -201,7 +201,7 @@ csio_pci_init(struct pci_dev *pdev, int *bars) goto err_disable_device; pci_set_master(pdev); - pci_try_set_mwi(pdev); + pci_set_mwi(pdev); rv = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); if (rv) diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c index ac67f420e..b4833c0f8 100644 --- a/drivers/scsi/lpfc/lpfc_init.c +++ b/drivers/scsi/lpfc/lpfc_init.c @@ -6119,7 +6119,7 @@ lpfc_enable_pci_dev(struct lpfc_hba *phba) goto out_disable_device; /* Set up device as PCI master and save state for EEH */ pci_set_master(pdev); - pci_try_set_mwi(pdev); + pci_set_mwi(pdev); pci_save_state(pdev); /* PCIe EEH recovery on powerpc platforms needs fundamental reset */ diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c index 5626e9b69..76019dc2e 100644 --- a/drivers/scsi/qla2xxx/qla_init.c +++ b/drivers/scsi/qla2xxx/qla_init.c @@ -2356,7 +2356,7 @@ qla2100_pci_config(scsi_qla_host_t *vha) struct device_reg_2xxx __iomem *reg = &ha->iobase->isp; pci_set_master(ha->pdev); - pci_try_set_mwi(ha->pdev); + pci_set_mwi(ha->pdev); pci_read_config_word(ha->pdev, PCI_COMMAND, &w); w |= (PCI_COMMAND_PARITY | PCI_COMMAND_SERR); @@ -2388,7 +2388,7 @@ qla2300_pci_config(scsi_qla_host_t *vha) struct device_reg_2xxx __iomem *reg = &ha->iobase->isp; pci_set_master(ha->pdev); - pci_try_set_mwi(ha->pdev); + pci_set_mwi(ha->pdev); pci_read_config_word(ha->pdev, PCI_COMMAND, &w); w |= (PCI_COMMAND_PARITY | PCI_COMMAND_SERR); @@ -2469,7 +2469,7 @@ qla24xx_pci_config(scsi_qla_host_t *vha) struct device_reg_24xx __iomem *reg = &ha->iobase->isp24; pci_set_master(ha->pdev); - pci_try_set_mwi(ha->pdev); + pci_set_mwi(ha->pdev); pci_read_config_word(ha->pdev, PCI_COMMAND, &w); w |= (PCI_COMMAND_PARITY | PCI_COMMAND_SERR); @@ -2511,7 +2511,7 @@ qla25xx_pci_config(scsi_qla_host_t *vha) struct qla_hw_data *ha = vha->hw; pci_set_master(ha->pdev); - pci_try_set_mwi(ha->pdev); + pci_set_mwi(ha->pdev); pci_read_config_word(ha->pdev, PCI_COMMAND, &w); w |= (PCI_COMMAND_PARITY | PCI_COMMAND_SERR); diff --git a/drivers/scsi/qla2xxx/qla_mr.c b/drivers/scsi/qla2xxx/qla_mr.c index ca7306685..e9763d8e3 100644 --- a/drivers/scsi/qla2xxx/qla_mr.c +++ b/drivers/scsi/qla2xxx/qla_mr.c @@ -499,7 +499,7 @@ qlafx00_pci_config(scsi_qla_host_t *vha) struct qla_hw_data *ha = vha->hw; pci_set_master(ha->pdev); - pci_try_set_mwi(ha->pdev); + pci_set_mwi(ha->pdev); pci_read_config_word(ha->pdev, PCI_COMMAND, &w); w |= (PCI_COMMAND_PARITY | PCI_COMMAND_SERR); diff --git a/drivers/tty/serial/8250/8250_lpss.c b/drivers/tty/serial/8250/8250_lpss.c index 4dee8a9e0..8acc1e5c9 100644 --- a/drivers/tty/serial/8250/8250_lpss.c +++ b/drivers/tty/serial/8250/8250_lpss.c @@ -193,7 +193,7 @@ static void qrk_serial_setup_dma(struct lpss8250 *lpss, struct uart_port *port) if (ret) return; - pci_try_set_mwi(pdev); + pci_set_mwi(pdev); /* Special DMA address for UART */ dma->rx_dma_addr = 0xfffff000; diff --git a/drivers/usb/chipidea/ci_hdrc_pci.c b/drivers/usb/chipidea/ci_hdrc_pci.c index d63479e1a..d412fa910 100644 --- a/drivers/usb/chipidea/ci_hdrc_pci.c +++ b/drivers/usb/chipidea/ci_hdrc_pci.c @@ -78,7 +78,7 @@ static int ci_hdrc_pci_probe(struct pci_dev *pdev, } pci_set_master(pdev); - pci_try_set_mwi(pdev); + pci_set_mwi(pdev); /* register a nop PHY */ ci->phy = usb_phy_generic_register(); diff --git a/drivers/usb/gadget/udc/amd5536udc_pci.c b/drivers/usb/gadget/udc/amd5536udc_pci.c index 8d387e0e4..9630ce8d3 100644 --- a/drivers/usb/gadget/udc/amd5536udc_pci.c +++ b/drivers/usb/gadget/udc/amd5536udc_pci.c @@ -151,7 +151,7 @@ static int udc_pci_probe( dev->chiprev = pdev->revision; pci_set_master(pdev); - pci_try_set_mwi(pdev); + pci_set_mwi(pdev); /* init dma pools */ if (use_dma) { diff --git a/drivers/usb/gadget/udc/net2280.c b/drivers/usb/gadget/udc/net2280.c index fc9f99fe7..e15520698 100644 --- a/drivers/usb/gadget/udc/net2280.c +++ b/drivers/usb/gadget/udc/net2280.c @@ -3761,7 +3761,7 @@ static int net2280_probe(struct pci_dev *pdev, const struct pci_device_id *id) &dev->pci->pcimstctl); /* erratum 0115 shouldn't appear: Linux inits PCI_LATENCY_TIMER */ pci_set_master(pdev); - pci_try_set_mwi(pdev); + pci_set_mwi(pdev); /* ... also flushes any posted pci writes */ dev->chiprev = get_idx_reg(dev->regs, REG_CHIPREV) & 0xffff; diff --git a/drivers/usb/gadget/udc/pch_udc.c b/drivers/usb/gadget/udc/pch_udc.c index a3c1fc924..4a0484a0c 100644 --- a/drivers/usb/gadget/udc/pch_udc.c +++ b/drivers/usb/gadget/udc/pch_udc.c @@ -3100,7 +3100,7 @@ static int pch_udc_probe(struct pci_dev *pdev, } pci_set_master(pdev); - pci_try_set_mwi(pdev); + pci_set_mwi(pdev); /* device struct setup */ spin_lock_init(&dev->lock); diff --git a/include/linux/pci.h b/include/linux/pci.h index de75f6a4d..c590f616d 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -1191,9 +1191,8 @@ void pci_clear_master(struct pci_dev *dev); int pci_set_pcie_reset_state(struct pci_dev *dev, enum pcie_reset_state state); int pci_set_cacheline_size(struct pci_dev *dev); -int __must_check pci_set_mwi(struct pci_dev *dev); -int __must_check pcim_set_mwi(struct pci_dev *dev); -int pci_try_set_mwi(struct pci_dev *dev); +int pci_set_mwi(struct pci_dev *dev); +int pcim_set_mwi(struct pci_dev *dev); void pci_clear_mwi(struct pci_dev *dev); void pci_intx(struct pci_dev *dev, int enable); bool pci_check_and_mask_intx(struct pci_dev *dev); -- 2.29.2