[dpdk-dev] [PATCH v5 04/12] bus: add bus iterator to find a device

[Bruce Richardson]

On Mon, Jun 26, 2017 at 02:22:02AM +0200, Gaetan Rivet wrote:
> From: Jan Blunck <jblunck at infradead.org>
> 
> Signed-off-by: Jan Blunck <jblunck at infradead.org>
> Signed-off-by: Gaetan Rivet <gaetan.rivet at 6wind.com>
> ---
>  lib/librte_eal/bsdapp/eal/rte_eal_version.map   |  1 +
>  lib/librte_eal/common/eal_common_bus.c          | 24 +++++++++++++++++++++++
>  lib/librte_eal/common/include/rte_bus.h         | 26 +++++++++++++++++++++++++
>  lib/librte_eal/linuxapp/eal/rte_eal_version.map |  1 +
>  4 files changed, 52 insertions(+)
> 
> diff --git a/lib/librte_eal/bsdapp/eal/rte_eal_version.map b/lib/librte_eal/bsdapp/eal/rte_eal_version.map
> index f1a0765..21640d6 100644
> --- a/lib/librte_eal/bsdapp/eal/rte_eal_version.map
> +++ b/lib/librte_eal/bsdapp/eal/rte_eal_version.map
> @@ -164,6 +164,7 @@ DPDK_17.05 {
>  
>  	rte_bus_find;
>  	rte_bus_find_by_device;
> +	rte_bus_find_device;
>  	rte_cpu_is_supported;
>  	rte_log_dump;
>  	rte_log_register;
> diff --git a/lib/librte_eal/common/eal_common_bus.c b/lib/librte_eal/common/eal_common_bus.c
> index d208214..63fd9f1 100644
> --- a/lib/librte_eal/common/eal_common_bus.c
> +++ b/lib/librte_eal/common/eal_common_bus.c
> @@ -190,3 +190,27 @@ rte_bus_find_by_device(const struct rte_device *dev)
>  {
>  	return rte_bus_find(bus_find_device, (const void *)dev, NULL);
>  }
> +
> +struct rte_device *
> +rte_bus_find_device(rte_dev_cmp_t cmp, const void *data,
> +		    const struct rte_device *start)

One additional suggestion: might it be worthwhile also returning the bus
for the device here, in an optional 4th parameter. This is, after all,
a bus API. :-)

/Bruce