Re: [dpdk-dev] [PATCH 2/4] bus/pci: reference driver structure

[Ferruh Yigit <ferruh.yigit@intel.com>]

On 4/11/2018 3:07 PM, Rafal Kozik wrote:
> Reference driver structure before calling rte_pci_map_device.
> It allow to use driver flags for adjusting configuration.
> 
> Signed-off-by: Rafal Kozik <rk@semihalf.com>
> ---
>  drivers/bus/pci/pci_common.c | 13 ++++++++-----
>  1 file changed, 8 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/bus/pci/pci_common.c b/drivers/bus/pci/pci_common.c
> index 2a00f36..15e9a47 100644
> --- a/drivers/bus/pci/pci_common.c
> +++ b/drivers/bus/pci/pci_common.c
> @@ -159,17 +159,20 @@ rte_pci_probe_one_driver(struct rte_pci_driver *dr,
>  	RTE_LOG(INFO, EAL, "  probe driver: %x:%x %s\n", dev->id.vendor_id,
>  		dev->id.device_id, dr->driver.name);
>  
> +	/* reference driver structure */
> +	dev->driver = dr;
> +	dev->device.driver = &dr->driver;

It can be good to comment that this needs to be before rte_pci_map_device()
incase someone wants to refactor code later.

> +
>  	if (dr->drv_flags & RTE_PCI_DRV_NEED_MAPPING) {
>  		/* map resources for devices that use igb_uio */
>  		ret = rte_pci_map_device(dev);
> -		if (ret != 0)
> +		if (ret != 0) {
> +			dev->driver = NULL;
> +			dev->device.driver = NULL;
>  			return ret;
> +		}
>  	}
>  
> -	/* reference driver structure */
> -	dev->driver = dr;
> -	dev->device.driver = &dr->driver;
> -
>  	/* call the driver probe() function */
>  	ret = dr->probe(dr, dev);
>  	if (ret) {
>