Hi Kishon,

On 02/04/2018 14:29, Kishon Vijay Abraham I wrote:
> In order to be able to provide correct driver_data for pci_epf device,
> a separate configfs entry for each pci_epf_device_id table entry in
> pci_epf_driver is required.
> 
> Add support to create configfs entry for each pci_epf_device_id
> table entry here.
> 
> Signed-off-by: Kishon Vijay Abraham I <kis...@ti.com>
> ---
>  drivers/pci/endpoint/pci-epf-core.c | 23 +++++++++++++++++++++--
>  include/linux/pci-epf.h             |  4 ++--
>  2 files changed, 23 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/pci/endpoint/pci-epf-core.c 
> b/drivers/pci/endpoint/pci-epf-core.c
> index 59ed29e550e9..d6787f39fd41 100644
> --- a/drivers/pci/endpoint/pci-epf-core.c
> +++ b/drivers/pci/endpoint/pci-epf-core.c
> @@ -15,6 +15,8 @@
>  #include <linux/pci-epf.h>
>  #include <linux/pci-ep-cfs.h>
>  
> +static DEFINE_MUTEX(pci_epf_mutex);
> +
>  static struct bus_type pci_epf_bus_type;
>  static const struct device_type pci_epf_type;
>  
> @@ -139,7 +141,13 @@ EXPORT_SYMBOL_GPL(pci_epf_alloc_space);
>   */
>  void pci_epf_unregister_driver(struct pci_epf_driver *driver)
>  {
> -     pci_ep_cfs_remove_epf_group(driver->group);
> +     struct config_group *group;
> +
> +     mutex_lock(&pci_epf_mutex);
> +     list_for_each_entry(group, &driver->epf_group, group_entry)
> +             pci_ep_cfs_remove_epf_group(group);
> +     list_del(&driver->epf_group);
> +     mutex_unlock(&pci_epf_mutex);
>       driver_unregister(&driver->driver);
>  }
>  EXPORT_SYMBOL_GPL(pci_epf_unregister_driver);
> @@ -155,6 +163,8 @@ int __pci_epf_register_driver(struct pci_epf_driver 
> *driver,
>                             struct module *owner)
>  {
>       int ret;
> +     struct config_group *group;
> +     const struct pci_epf_device_id *id;
>  
>       if (!driver->ops)
>               return -EINVAL;
> @@ -169,7 +179,16 @@ int __pci_epf_register_driver(struct pci_epf_driver 
> *driver,
>       if (ret)
>               return ret;
>  
> -     driver->group = pci_ep_cfs_add_epf_group(driver->driver.name);
> +     INIT_LIST_HEAD(&driver->epf_group);
> +
> +     id = driver->id_table;
> +     while (id->name[0]) {
> +             group = pci_ep_cfs_add_epf_group(id->name);
> +             mutex_lock(&pci_epf_mutex);
> +             list_add_tail(&group->group_entry, &driver->epf_group);
> +             mutex_unlock(&pci_epf_mutex);
> +             id++;
> +     }
>  
>       return 0;
>  }
> diff --git a/include/linux/pci-epf.h b/include/linux/pci-epf.h
> index e897bf076701..a30dcaafa6e8 100644
> --- a/include/linux/pci-epf.h
> +++ b/include/linux/pci-epf.h
> @@ -72,7 +72,7 @@ struct pci_epf_ops {
>   * @driver: PCI EPF driver
>   * @ops: set of function pointers for performing EPF operations
>   * @owner: the owner of the module that registers the PCI EPF driver
> - * @group: configfs group corresponding to the PCI EPF driver
> + * @epf_group: list of configfs group corresponding to the PCI EPF driver
>   * @id_table: identifies EPF devices for probing
>   */
>  struct pci_epf_driver {
> @@ -82,7 +82,7 @@ struct pci_epf_driver {
>       struct device_driver    driver;
>       struct pci_epf_ops      *ops;
>       struct module           *owner;
> -     struct config_group     *group;
> +     struct list_head        epf_group;
>       const struct pci_epf_device_id  *id_table;
>  };
>  
> 

Works like a charm. :)

Tested-by: Gustavo Pimentel <gustavo.pimen...@synopsys.com>

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