[PATCH v3] pci: implement find_device bus operation

[Gaetan Rivet <gaetan.rivet@6wind.com>]

Signed-off-by: Gaetan Rivet <gaetan.rivet@6wind.com>
---
This patch depends on:

bus: attach / detach API
http://dpdk.org/ml/archives/dev/2017-May/066330.html
http://dpdk.org/dev/patchwork/patch/24489/

v1 --> v2

 * Use the newly defined rte_dev_match_t type

v2 --> v3

 * Use new comparison behavior.

---
 lib/librte_eal/common/eal_common_pci.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/lib/librte_eal/common/eal_common_pci.c b/lib/librte_eal/common/eal_common_pci.c
index 5ae5201..5a8478c 100644
--- a/lib/librte_eal/common/eal_common_pci.c
+++ b/lib/librte_eal/common/eal_common_pci.c
@@ -483,10 +483,23 @@ rte_pci_remove_device(struct rte_pci_device *pci_dev)
 	TAILQ_REMOVE(&rte_pci_bus.device_list, pci_dev, next);
 }
 
+static struct rte_device *
+pci_find_device(rte_dev_cmp_t cmp, const void *data)
+{
+	struct rte_pci_device *dev;
+
+	FOREACH_DEVICE_ON_PCIBUS(dev) {
+		if (cmp(&dev->device, data) == 0)
+			return &dev->device;
+	}
+	return NULL;
+}
+
 struct rte_pci_bus rte_pci_bus = {
 	.bus = {
 		.scan = rte_pci_scan,
 		.probe = rte_pci_probe,
+		.find_device = pci_find_device,
 	},
 	.device_list = TAILQ_HEAD_INITIALIZER(rte_pci_bus.device_list),
 	.driver_list = TAILQ_HEAD_INITIALIZER(rte_pci_bus.driver_list),
-- 
2.1.4