ethdev: fix port accessing after release

rte_eth_dev_pci_release() function wrongly releases an ethdev port and
then releases internal fields of this port.
This behavior is problematic, because after the release, the port may
be reallocated again by another thread or just be invalid for any
usage.

Move the release operation to the end of the function.

Fixes: dcd5c8112bc3 ("ethdev: add PCI driver helpers")
Cc: stable@dpdk.org
Suggested-by: Ferruh Yigit <ferruh.yigit@intel.com>
Signed-off-by: Matan Azrad <matan@mellanox.com>
Acked-by: Thomas Monjalon <thomas@monjalon.net>

diff --git a/lib/librte_ether/rte_ethdev_pci.h b/lib/librte_ether/rte_ethdev_pci.h
index 897ce5b..6565ae7 100644 (file)
--- a/lib/librte_ether/rte_ethdev_pci.h
+++ b/lib/librte_ether/rte_ethdev_pci.h
@@ -123,9 +123,6 @@ rte_eth_dev_pci_allocate(struct rte_pci_device *dev, size_t private_data_size)
 static inline void
 rte_eth_dev_pci_release(struct rte_eth_dev *eth_dev)
 {
-       /* free ether device */
-       rte_eth_dev_release_port(eth_dev);
-
        if (rte_eal_process_type() == RTE_PROC_PRIMARY)
                rte_free(eth_dev->data->dev_private);
 
@@ -139,6 +136,9 @@ rte_eth_dev_pci_release(struct rte_eth_dev *eth_dev)
 
        eth_dev->device = NULL;
        eth_dev->intr_handle = NULL;
+
+       /* free ether device */
+       rte_eth_dev_release_port(eth_dev);
 }
 
 typedef int (*eth_dev_pci_callback_t)(struct rte_eth_dev *eth_dev);