[v5,00/11] PCI: Drop duplicated tracking of a pci_dev's bound driver

Message

Uwe Kleine-König Sept. 29, 2021, 8:52 a.m. UTC

Hello,

this is v5 of the quest to drop the "driver" member from struct pci_dev
which tracks the same data (apart from a constant offset) as dev.driver.

Changes since v4:
 - split some changes out of "PCI: replace pci_dev::driver usage that
   gets the driver name" and reworked them a bit as suggested by Bjorn.
 - Add a line break in
   drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c to please
   checkpatch --strict and Simon Horman.
 - Fixed a build problem in "crypto: qat - simplify adf_enable_aer()",
   thanks to Giovanni Cabiddu for spotting and a suggested fix.

I didn't replace :: by . as suggested by Bjorn as I'm unsure if his
preference is stronger than mine.

This patch stack survived an allmodconfig build on arm64, m68k, powerpc,
riscv, s390, sparc64 and x86_64 on top of v5.15-rc3.

Best regards
Uwe

Uwe Kleine-König (11):
  PCI: Simplify pci_device_remove()
  PCI: Drop useless check from pci_device_probe()
  xen/pci: Drop some checks that are always true
  bcma: simplify reference to the driver's name
  powerpc/eeh: Don't use driver member of struct pci_dev and further
    cleanups
  ssb: Simplify determination of driver name
  PCI: Replace pci_dev::driver usage that gets the driver name
  scsi: message: fusion: Remove unused parameter of mpt_pci driver's
    probe()
  crypto: qat - simplify adf_enable_aer()
  PCI: Replace pci_dev::driver usage by pci_dev::dev.driver
  PCI: Drop duplicated tracking of a pci_dev's bound driver

 arch/powerpc/include/asm/ppc-pci.h            |  5 --
 arch/powerpc/kernel/eeh.c                     |  8 +++
 arch/powerpc/kernel/eeh_driver.c              | 10 +--
 arch/x86/events/intel/uncore.c                |  2 +-
 arch/x86/kernel/probe_roms.c                  |  2 +-
 drivers/bcma/host_pci.c                       |  6 +-
 drivers/crypto/hisilicon/qm.c                 |  2 +-
 drivers/crypto/qat/qat_4xxx/adf_drv.c         |  7 +--
 drivers/crypto/qat/qat_c3xxx/adf_drv.c        |  7 +--
 drivers/crypto/qat/qat_c62x/adf_drv.c         |  7 +--
 drivers/crypto/qat/qat_common/adf_aer.c       | 10 +--
 .../crypto/qat/qat_common/adf_common_drv.h    |  3 +-
 drivers/crypto/qat/qat_dh895xcc/adf_drv.c     |  7 +--
 drivers/message/fusion/mptbase.c              |  7 +--
 drivers/message/fusion/mptbase.h              |  2 +-
 drivers/message/fusion/mptctl.c               |  4 +-
 drivers/message/fusion/mptlan.c               |  2 +-
 drivers/misc/cxl/guest.c                      | 24 ++++---
 drivers/misc/cxl/pci.c                        | 30 +++++----
 .../ethernet/hisilicon/hns3/hns3_ethtool.c    |  2 +-
 .../ethernet/marvell/prestera/prestera_pci.c  |  2 +-
 drivers/net/ethernet/mellanox/mlxsw/pci.c     |  2 +-
 .../ethernet/netronome/nfp/nfp_net_ethtool.c  |  3 +-
 drivers/pci/iov.c                             | 25 +++++---
 drivers/pci/pci-driver.c                      | 45 ++++++-------
 drivers/pci/pci.c                             |  4 +-
 drivers/pci/pcie/err.c                        | 36 ++++++-----
 drivers/pci/xen-pcifront.c                    | 63 +++++++++----------
 drivers/ssb/pcihost_wrapper.c                 |  6 +-
 drivers/usb/host/xhci-pci.c                   |  2 +-
 include/linux/pci.h                           |  1 -
 31 files changed, 161 insertions(+), 175 deletions(-)

Range-diff against v4:
 1:  8d064bbc74b0 =  1:  c2b53ab26a6b PCI: Simplify pci_device_remove()
 2:  966b49c308b4 =  2:  2c733e1d5186 PCI: Drop useless check from pci_device_probe()
 3:  ce710d6e8a1b =  3:  547ca5a7aa16 xen/pci: Drop some checks that are always true
 -:  ------------ >  4:  40eb07353844 bcma: simplify reference to the driver's name
 -:  ------------ >  5:  bab59c1dff6d powerpc/eeh: Don't use driver member of struct pci_dev and further cleanups
 -:  ------------ >  6:  abd70de9782d ssb: Simplify determination of driver name
 4:  3e4e6994a59d !  7:  735845bd26b9 PCI: replace pci_dev::driver usage that gets the driver name
    @@ Metadata
     Author: Uwe Kleine-König <[e-mail]>
     
      ## Commit message ##
    -    PCI: replace pci_dev::driver usage that gets the driver name
    +    PCI: Replace pci_dev::driver usage that gets the driver name
     
         struct pci_dev::driver holds (apart from a constant offset) the same
         data as struct pci_dev::dev->driver. With the goal to remove struct
    @@ Commit message
     
         Signed-off-by: Uwe Kleine-König <[e-mail]>
     
    - ## arch/powerpc/include/asm/ppc-pci.h ##
    -@@ arch/powerpc/include/asm/ppc-pci.h: void eeh_sysfs_remove_device(struct pci_dev *pdev);
    - 
    - static inline const char *eeh_driver_name(struct pci_dev *pdev)
    - {
    --	return (pdev && pdev->driver) ? pdev->driver->name : "<null>";
    -+	if (pdev) {
    -+		const char *drvstr = dev_driver_string(&pdev->dev);
    -+
    -+		if (strcmp(drvstr, ""))
    -+			return drvstr;
    -+	}
    -+
    -+	return "<null>";
    - }
    - 
    - #endif /* CONFIG_EEH */
    -
    - ## drivers/bcma/host_pci.c ##
    -@@ drivers/bcma/host_pci.c: static int bcma_host_pci_probe(struct pci_dev *dev,
    - 	if (err)
    - 		goto err_kfree_bus;
    - 
    --	name = dev_name(&dev->dev);
    --	if (dev->driver && dev->driver->name)
    --		name = dev->driver->name;
    -+	name = dev_driver_string(&dev->dev);
    -+	if (!strcmp(name, ""))
    -+		name = dev_name(&dev->dev);
    -+
    - 	err = pci_request_regions(dev, name);
    - 	if (err)
    - 		goto err_pci_disable;
    -
      ## drivers/crypto/hisilicon/qm.c ##
     @@ drivers/crypto/hisilicon/qm.c: static int qm_alloc_uacce(struct hisi_qm *qm)
      	};
    @@ drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c: nfp_get_drvinfo(struct nfp
      	char nsp_version[ETHTOOL_FWVERS_LEN] = {};
      
     -	strlcpy(drvinfo->driver, pdev->driver->name, sizeof(drvinfo->driver));
    -+	strlcpy(drvinfo->driver, dev_driver_string(&pdev->dev), sizeof(drvinfo->driver));
    ++	strlcpy(drvinfo->driver, dev_driver_string(&pdev->dev),
    ++		sizeof(drvinfo->driver));
      	nfp_net_get_nspinfo(app, nsp_version);
      	snprintf(drvinfo->fw_version, sizeof(drvinfo->fw_version),
      		 "%s %s %s %s", vnic_version, nsp_version,
    -
    - ## drivers/ssb/pcihost_wrapper.c ##
    -@@ drivers/ssb/pcihost_wrapper.c: static int ssb_pcihost_probe(struct pci_dev *dev,
    - 	err = pci_enable_device(dev);
    - 	if (err)
    - 		goto err_kfree_ssb;
    --	name = dev_name(&dev->dev);
    --	if (dev->driver && dev->driver->name)
    --		name = dev->driver->name;
    -+
    -+	name = dev_driver_string(&dev->dev);
    -+	if (*name == '\0')
    -+		name = dev_name(&dev->dev);
    -+
    - 	err = pci_request_regions(dev, name);
    - 	if (err)
    - 		goto err_pci_disable;
 5:  574b743327b8 =  8:  1e58019165b9 scsi: message: fusion: Remove unused parameter of mpt_pci driver's probe()
 6:  674c6efd3dab !  9:  dea72a470141 crypto: qat - simplify adf_enable_aer()
    @@ drivers/crypto/qat/qat_4xxx/adf_drv.c: static struct pci_driver adf_driver = {
      	.probe = adf_probe,
      	.remove = adf_remove,
      	.sriov_configure = adf_sriov_configure,
    -+	.err_handler = adf_err_handler,
    ++	.err_handler = &adf_err_handler,
      };
      
      module_pci_driver(adf_driver);
    @@ drivers/crypto/qat/qat_c3xxx/adf_drv.c: static struct pci_driver adf_driver = {
      	.probe = adf_probe,
      	.remove = adf_remove,
      	.sriov_configure = adf_sriov_configure,
    -+	.err_handler = adf_err_handler,
    ++	.err_handler = &adf_err_handler,
      };
      
      static void adf_cleanup_pci_dev(struct adf_accel_dev *accel_dev)
    @@ drivers/crypto/qat/qat_c62x/adf_drv.c: static struct pci_driver adf_driver = {
      	.probe = adf_probe,
      	.remove = adf_remove,
      	.sriov_configure = adf_sriov_configure,
    -+	.err_handler = adf_err_handler,
    ++	.err_handler = &adf_err_handler,
      };
      
      static void adf_cleanup_pci_dev(struct adf_accel_dev *accel_dev)
    @@ drivers/crypto/qat/qat_common/adf_common_drv.h: void adf_ae_fw_release(struct ad
      int adf_ae_stop(struct adf_accel_dev *accel_dev);
      
     -int adf_enable_aer(struct adf_accel_dev *accel_dev);
    ++extern const struct pci_error_handlers adf_err_handler;
     +void adf_enable_aer(struct adf_accel_dev *accel_dev);
      void adf_disable_aer(struct adf_accel_dev *accel_dev);
      void adf_reset_sbr(struct adf_accel_dev *accel_dev);
    @@ drivers/crypto/qat/qat_dh895xcc/adf_drv.c: static struct pci_driver adf_driver =
      	.probe = adf_probe,
      	.remove = adf_remove,
      	.sriov_configure = adf_sriov_configure,
    -+	.err_handler = adf_err_handler,
    ++	.err_handler = &adf_err_handler,
      };
      
      static void adf_cleanup_pci_dev(struct adf_accel_dev *accel_dev)
 7:  0e022deb0f75 = 10:  b4165dda38ea PCI: Replace pci_dev::driver usage by pci_dev::dev.driver
 8:  edd9d24df02a = 11:  d93a138bd7ab PCI: Drop duplicated tracking of a pci_dev's bound driver

base-commit: 5816b3e6577eaa676ceb00a848f0fd65fe2adc29