diff mbox series

[V4] ethdev: fix eth device released repeatedly

Message ID 20211021022421.9306-1-lihuisong@huawei.com (mailing list archive)
State Accepted, archived
Delegated to: Ferruh Yigit
Headers
Series [V4] ethdev: fix eth device released repeatedly |

Checks

Context Check Description
ci/checkpatch success coding style OK
ci/github-robot: build success github build: passed
ci/iol-broadcom-Performance success Performance Testing PASS
ci/iol-broadcom-Functional success Functional Testing PASS
ci/iol-aarch64-compile-testing success Testing PASS
ci/iol-x86_64-unit-testing success Testing PASS
ci/iol-intel-Functional success Functional Testing PASS
ci/Intel-compilation success Compilation OK
ci/intel-Testing success Testing PASS
ci/iol-x86_64-compile-testing success Testing PASS
ci/iol-intel-Performance success Performance Testing PASS
ci/iol-mellanox-Performance success Performance Testing PASS

Commit Message

lihuisong (C) Oct. 21, 2021, 2:24 a.m. UTC 
  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: stable@dpdk.org

Signed-off-by: Huisong Li <lihuisong@huawei.com>
---
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(+)

Comments

Ferruh Yigit Oct. 21, 2021, 9:19 p.m. UTC | #1 
On 10/21/2021 3:24 AM, Huisong Li wrote:
> 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: stable@dpdk.org
> 
> Signed-off-by: Huisong Li <lihuisong@huawei.com>

Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>

Applied to dpdk-next-net/main, thanks.
diff mbox series

Patch

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)