[dpdk-dev] [PATCH v2] ethdev: do not allow to close started device

[Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>]

Ethernet device must be stopped first before close in accordance
with the documentation.

Fixes: 980995f8cc56 ("ethdev: improve API comments of close and detach functions")
Cc: stable@dpdk.org

Signed-off-by: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>
---
In fact the patch is required to fix segfault in the case of
net/virtio on close without stop after Rx interrupts enabled.

 lib/ethdev/rte_ethdev.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/lib/ethdev/rte_ethdev.c b/lib/ethdev/rte_ethdev.c
index 3b8ef9ef22..f981e0226a 100644
--- a/lib/ethdev/rte_ethdev.c
+++ b/lib/ethdev/rte_ethdev.c
@@ -1893,6 +1893,12 @@ rte_eth_dev_close(uint16_t port_id)
 	RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, -ENODEV);
 	dev = &rte_eth_devices[port_id];
 
+	if (dev->data->dev_started) {
+		RTE_ETHDEV_LOG(ERR, "Cannot close started device (port %u)\n",
+			       port_id);
+		return -EINVAL;
+	}
+
 	RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->dev_close, -ENOTSUP);
 	*lasterr = (*dev->dev_ops->dev_close)(dev);
 	if (*lasterr != 0)
-- 
2.30.2