[dpdk-dev] [PATCH v7 06/12] eal: Add pci_uio_alloc_resource()

[Bruce Richardson]

On Tue, Jun 30, 2015 at 05:24:22PM +0900, Tetsuya Mukawa wrote:
> From: "Tetsuya.Mukawa" <mukawa at igel.co.jp>
> 
> This patch adds a new function called pci_uio_alloc_resource().
> The function hides how to prepare uio resource in linuxapp and bsdapp.
> With the function, pci_uio_map_resource() will be more abstracted.
> 
> Signed-off-by: Tetsuya Mukawa <mukawa at igel.co.jp>
> ---
>  lib/librte_eal/bsdapp/eal/eal_pci.c       | 70 +++++++++++++++++++---------
>  lib/librte_eal/linuxapp/eal/eal_pci_uio.c | 77 ++++++++++++++++++++++---------
>  2 files changed, 104 insertions(+), 43 deletions(-)
> 
> diff --git a/lib/librte_eal/bsdapp/eal/eal_pci.c b/lib/librte_eal/bsdapp/eal/eal_pci.c
> index 06c564f..7d2f8b5 100644
> --- a/lib/librte_eal/bsdapp/eal/eal_pci.c
> +++ b/lib/librte_eal/bsdapp/eal/eal_pci.c
> @@ -189,28 +189,17 @@ pci_uio_map_secondary(struct rte_pci_device *dev)
>  	return 1;
>  }
>  
> -/* map the PCI resource of a PCI device in virtual memory */
>  static int
> -pci_uio_map_resource(struct rte_pci_device *dev)
> +pci_uio_alloc_resource(struct rte_pci_device *dev,
> +		struct mapped_pci_resource **uio_res)

Rather than having to pass in a pointer to a pointer, why not change the
return type to be "struct mapped_pci_resource *"? The only return values currently
are 0 and -1, so those could map to non-NULL and NULL respectively, for error
checking.

/Bruce