From: Greg Kroah-Hartman <[email protected]> Some drivers (specifically the nes IB driver), want to create a lot of sysfs driver attributes. Instead of open-coding the creation and removal of these files (and getting it wrong btw), it's a better idea to let the driver core handle all of this logic for us.
So add a new field to the pci driver structure, **groups, that allows pci drivers to specify an attribute group list it wishes to have created when it is registered with the driver core. Big bonus is now the driver doesn't race with userspace when the sysfs files are created vs. when the kobject is announced, so any script/tool that actually wanted to use these files will not have to poll waiting for them to show up. Cc: Faisal Latif <[email protected]> Cc: Doug Ledford <[email protected]> Cc: Sean Hefty <[email protected]> Cc: Hal Rosenstock <[email protected]> Cc: Bjorn Helgaas <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/infiniband/hw/nes/nes.c | 69 +++++++++++++--------------------------- drivers/pci/pci-driver.c | 1 include/linux/pci.h | 1 3 files changed, 26 insertions(+), 45 deletions(-) --- a/drivers/infiniband/hw/nes/nes.c +++ b/drivers/infiniband/hw/nes/nes.c @@ -808,13 +808,6 @@ static void nes_remove(struct pci_dev *p } -static struct pci_driver nes_pci_driver = { - .name = DRV_NAME, - .id_table = nes_pci_table, - .probe = nes_probe, - .remove = nes_remove, -}; - static ssize_t adapter_show(struct device_driver *ddp, char *buf) { unsigned int devfn = 0xffffffff; @@ -1156,35 +1149,29 @@ static DRIVER_ATTR_RW(idx_addr); static DRIVER_ATTR_RW(idx_data); static DRIVER_ATTR_RW(wqm_quanta); -static int nes_create_driver_sysfs(struct pci_driver *drv) -{ - int error; - error = driver_create_file(&drv->driver, &driver_attr_adapter); - error |= driver_create_file(&drv->driver, &driver_attr_eeprom_cmd); - error |= driver_create_file(&drv->driver, &driver_attr_eeprom_data); - error |= driver_create_file(&drv->driver, &driver_attr_flash_cmd); - error |= driver_create_file(&drv->driver, &driver_attr_flash_data); - error |= driver_create_file(&drv->driver, &driver_attr_nonidx_addr); - error |= driver_create_file(&drv->driver, &driver_attr_nonidx_data); - error |= driver_create_file(&drv->driver, &driver_attr_idx_addr); - error |= driver_create_file(&drv->driver, &driver_attr_idx_data); - error |= driver_create_file(&drv->driver, &driver_attr_wqm_quanta); - return error; -} - -static void nes_remove_driver_sysfs(struct pci_driver *drv) -{ - driver_remove_file(&drv->driver, &driver_attr_adapter); - driver_remove_file(&drv->driver, &driver_attr_eeprom_cmd); - driver_remove_file(&drv->driver, &driver_attr_eeprom_data); - driver_remove_file(&drv->driver, &driver_attr_flash_cmd); - driver_remove_file(&drv->driver, &driver_attr_flash_data); - driver_remove_file(&drv->driver, &driver_attr_nonidx_addr); - driver_remove_file(&drv->driver, &driver_attr_nonidx_data); - driver_remove_file(&drv->driver, &driver_attr_idx_addr); - driver_remove_file(&drv->driver, &driver_attr_idx_data); - driver_remove_file(&drv->driver, &driver_attr_wqm_quanta); -} +static struct attribute *nes_attrs[] = { + &driver_attr_adapter, + &driver_attr_eeprom_cmd, + &driver_attr_eeprom_data, + &driver_attr_flash_cmd, + &driver_attr_flash_data, + &driver_attr_nonidx_addr, + &driver_attr_nonidx_data, + &driver_attr_idx_addr, + &driver_attr_idx_data, + &driver_attr_wqm_quanta, + NULL, +}; +ATTRIBUTE_GROUPS(nes); + +static struct pci_driver nes_pci_driver = { + .name = DRV_NAME, + .id_table = nes_pci_table, + .probe = nes_probe, + .remove = nes_remove, + .groups = nes_groups, +}; + /** * nes_init_module - module initialization entry point @@ -1192,20 +1179,13 @@ static void nes_remove_driver_sysfs(stru static int __init nes_init_module(void) { int retval; - int retval1; retval = nes_cm_start(); if (retval) { printk(KERN_ERR PFX "Unable to start NetEffect iWARP CM.\n"); return retval; } - retval = pci_register_driver(&nes_pci_driver); - if (retval >= 0) { - retval1 = nes_create_driver_sysfs(&nes_pci_driver); - if (retval1 < 0) - printk(KERN_ERR PFX "Unable to create NetEffect sys files.\n"); - } - return retval; + return pci_register_driver(&nes_pci_driver); } @@ -1215,7 +1195,6 @@ static int __init nes_init_module(void) static void __exit nes_exit_module(void) { nes_cm_stop(); - nes_remove_driver_sysfs(&nes_pci_driver); pci_unregister_driver(&nes_pci_driver); } --- a/drivers/pci/pci-driver.c +++ b/drivers/pci/pci-driver.c @@ -1307,6 +1307,7 @@ int __pci_register_driver(struct pci_dri drv->driver.bus = &pci_bus_type; drv->driver.owner = owner; drv->driver.mod_name = mod_name; + drv->driver.groups = drv->groups; spin_lock_init(&drv->dynids.lock); INIT_LIST_HEAD(&drv->dynids.list); --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -729,6 +729,7 @@ struct pci_driver { void (*shutdown) (struct pci_dev *dev); int (*sriov_configure) (struct pci_dev *dev, int num_vfs); /* PF pdev */ const struct pci_error_handlers *err_handler; + const struct attribute_group **groups; struct device_driver driver; struct pci_dynids dynids; };
