In secondary process, rte_eth_dev_close() doesn't clear eth_dev->data.
If calling rte_dev_remove() after rte_eth_dev_close(),
in rte_eth_dev_pci_generic_remove() function, the released eth device still
can be found by its name in shared memory. As a result, the eth device will
be released repeatedly. The state of the eth device is modified to
RTE_ETH_DEV_UNUSED after rte_eth_dev_close(). So this state can be used to
avoid this problem.
Fixes: dcd5c8112bc3 ("ethdev: add PCI driver helpers")
Cc: [email protected]
Signed-off-by: Huisong Li <[email protected]>
---
v4:
* add fixes line and stable tag.
v3:
* fix the commit log description and the comment inside the code.
v2:
* fix the commit log description.
v1:
* fix commit log and add a judgment for secondary process.
---
lib/ethdev/ethdev_pci.h | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/lib/ethdev/ethdev_pci.h b/lib/ethdev/ethdev_pci.h
index 8edca82ce8..fcabae02fa 100644
--- a/lib/ethdev/ethdev_pci.h
+++ b/lib/ethdev/ethdev_pci.h
@@ -151,6 +151,16 @@ rte_eth_dev_pci_generic_remove(struct rte_pci_device
*pci_dev,
if (!eth_dev)
return 0;
+ /*
+ * In secondary process, a released eth device can be found by its name
+ * in shared memory.
+ * If the state of the eth device is RTE_ETH_DEV_UNUSED, it means the
+ * eth device has been released.
+ */
+ if (rte_eal_process_type() == RTE_PROC_SECONDARY &&
+ eth_dev->state == RTE_ETH_DEV_UNUSED)
+ return 0;
+
if (dev_uninit) {
ret = dev_uninit(eth_dev);
if (ret)
--
2.33.0
