[dpdk-dev] [PATCH 1/1] ethdev: change owner delete function return value to int

[Andrew Rybchenko <arybchenko@solarflare.com>]

From: Igor Romanov <igor.romanov@oktetlabs.ru>

Change rte_eth_dev_owner_delete() return value from void to int
and return negative errno values in case of error conditions.

Right now there is only one error case for rte_eth_dev_owner_delete() -
invalid owner, but it still makes sense to return error to catch bugs
in the code which uses the function.

Also update the usage of the function in drivers/netvsc
according to the new return type.

Signed-off-by: Igor Romanov <igor.romanov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
---
 doc/guides/rel_notes/deprecation.rst   | 1 -
 doc/guides/rel_notes/release_19_11.rst | 3 +++
 drivers/net/netvsc/hn_ethdev.c         | 5 ++++-
 lib/librte_ethdev/rte_ethdev.c         | 6 +++++-
 lib/librte_ethdev/rte_ethdev.h         | 4 +++-
 5 files changed, 15 insertions(+), 4 deletions(-)

diff --git a/doc/guides/rel_notes/deprecation.rst b/doc/guides/rel_notes/deprecation.rst
index 61ba2e0bc..237813b64 100644
--- a/doc/guides/rel_notes/deprecation.rst
+++ b/doc/guides/rel_notes/deprecation.rst
@@ -90,7 +90,6 @@ Deprecation Notices
 
   - ``rte_eth_dev_stop``
   - ``rte_eth_dev_close``
-  - ``rte_eth_dev_owner_delete``
 
 * ethdev: New offload flags ``DEV_RX_OFFLOAD_RSS_HASH`` and
   ``DEV_RX_OFFLOAD_FLOW_MARK`` will be added in 19.11.
diff --git a/doc/guides/rel_notes/release_19_11.rst b/doc/guides/rel_notes/release_19_11.rst
index 033ed54f4..54950277b 100644
--- a/doc/guides/rel_notes/release_19_11.rst
+++ b/doc/guides/rel_notes/release_19_11.rst
@@ -115,6 +115,9 @@ API Changes
 * ethdev: changed ``rte_eth_macaddr_get`` return value from ``void`` to
   ``int`` to provide a way to report various error conditions.
 
+* ethdev: changed ``rte_eth_dev_owner_delete`` return value from ``void`` to
+  ``int`` to provide a way to report various error conditions.
+
 
 ABI Changes
 -----------
diff --git a/drivers/net/netvsc/hn_ethdev.c b/drivers/net/netvsc/hn_ethdev.c
index ca96e80a4..eed8dece9 100644
--- a/drivers/net/netvsc/hn_ethdev.c
+++ b/drivers/net/netvsc/hn_ethdev.c
@@ -1004,6 +1004,7 @@ static int
 eth_hn_dev_uninit(struct rte_eth_dev *eth_dev)
 {
 	struct hn_data *hv = eth_dev->data->dev_private;
+	int ret;
 
 	PMD_INIT_FUNC_TRACE();
 
@@ -1021,7 +1022,9 @@ eth_hn_dev_uninit(struct rte_eth_dev *eth_dev)
 	hn_tx_pool_uninit(eth_dev);
 	rte_vmbus_chan_close(hv->primary->chan);
 	rte_free(hv->primary);
-	rte_eth_dev_owner_delete(hv->owner.id);
+	ret = rte_eth_dev_owner_delete(hv->owner.id);
+	if (ret != 0)
+		return ret;
 
 	return 0;
 }
diff --git a/lib/librte_ethdev/rte_ethdev.c b/lib/librte_ethdev/rte_ethdev.c
index 29ecb9274..e50bac847 100644
--- a/lib/librte_ethdev/rte_ethdev.c
+++ b/lib/librte_ethdev/rte_ethdev.c
@@ -687,10 +687,11 @@ rte_eth_dev_owner_unset(const uint16_t port_id, const uint64_t owner_id)
 	return ret;
 }
 
-void
+int
 rte_eth_dev_owner_delete(const uint64_t owner_id)
 {
 	uint16_t port_id;
+	int ret = 0;
 
 	rte_eth_dev_shared_data_prepare();
 
@@ -708,9 +709,12 @@ rte_eth_dev_owner_delete(const uint64_t owner_id)
 		RTE_ETHDEV_LOG(ERR,
 			       "Invalid owner id=%016"PRIx64"\n",
 			       owner_id);
+		ret = -EINVAL;
 	}
 
 	rte_spinlock_unlock(&rte_eth_dev_shared_data->ownership_lock);
+
+	return ret;
 }
 
 int
diff --git a/lib/librte_ethdev/rte_ethdev.h b/lib/librte_ethdev/rte_ethdev.h
index 9c213e072..d937fb429 100644
--- a/lib/librte_ethdev/rte_ethdev.h
+++ b/lib/librte_ethdev/rte_ethdev.h
@@ -1566,9 +1566,11 @@ int rte_eth_dev_owner_unset(const uint16_t port_id,
  *
  * @param	owner_id
  *  The owner identifier.
+ * @return
+ *  0 on success, negative errno value on error.
  */
 __rte_experimental
-void rte_eth_dev_owner_delete(const uint64_t owner_id);
+int rte_eth_dev_owner_delete(const uint64_t owner_id);
 
 /**
  * @warning
-- 
2.17.1