[dpdk-dev] [PATCH] ethdev: fix eth device released repeatedly

[Huisong Li]

In secondary process, because it doesn't clear eth_dev->data, the "eth_dev"
above will not be NULL when rte_eth_dev_close() has been called before this
interface is called. In this case, Ethernet device will be released
repeatedly. The state of the Ethernet device is equal to RTE_ETH_DEV_UNUSED
after calling rte_eth_dev_close(). Using this state resolves problem.

Fixes: 99a2dd955fba ("lib: remove librte_ prefix from directory names")

Signed-off-by: Huisong Li <lihuisong at huawei.com>
---
RFC -> v1:
 * fix commit log and add a judgment for secondary process.

---
 lib/ethdev/ethdev_pci.h | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/lib/ethdev/ethdev_pci.h b/lib/ethdev/ethdev_pci.h
index 8edca82ce8..be695feefe 100644
--- a/lib/ethdev/ethdev_pci.h
+++ b/lib/ethdev/ethdev_pci.h
@@ -151,6 +151,20 @@ rte_eth_dev_pci_generic_remove(struct rte_pci_device *pci_dev,
 	if (!eth_dev)
 		return 0;
 
+	/*
+	 * In secondary process, because it doesn't clear eth_dev->data, the
+	 * "eth_dev" above will not be NULL when rte_eth_dev_close() has been
+	 * called before this interface is called.
+	 * In this case, Ethernet device will be released repeatedly.
+	 * The state of the Ethernet device is equal to RTE_ETH_DEV_UNUSED after
+	 * calling rte_eth_dev_close(). Using this state resolves problem.
+	 */
+	if (rte_eal_process_type() != RTE_PROC_PRIMARY &&
+	    eth_dev->state == RTE_ETH_DEV_UNUSED) {
+		RTE_ETHDEV_LOG(INFO, "The ethdev port has been released.");
+		return 0;
+	}
+
 	if (dev_uninit) {
 		ret = dev_uninit(eth_dev);
 		if (ret)
-- 
2.33.0