net: ena: Fix error handling in ena_init()

[ Upstream commit d349e9be5a2c2d7588a2c4e4bfa0bb3dc1226769 ]

The ena_init() won't destroy workqueue created by
create_singlethread_workqueue() when pci_register_driver() failed.
Call destroy_workqueue() when pci_register_driver() failed to prevent the
resource leak.

Fixes: 1738cd3ed342 ("net: ena: Add a driver for Amazon Elastic Network Adapters (ENA)")
Signed-off-by: Yuan Can <yuancan@huawei.com>
Acked-by: Shay Agroskin <shayagr@amazon.com>
Link: https://lore.kernel.org/r/20221114025659.124726-1-yuancan@huawei.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.c b/drivers/net/ethernet/amazon/ena/ena_netdev.c
index 8f08e0b..f032e58 100644 (file)
--- a/drivers/net/ethernet/amazon/ena/ena_netdev.c
+++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c
@@ -4583,13 +4583,19 @@ static struct pci_driver ena_pci_driver = {
 
 static int __init ena_init(void)
 {
+       int ret;
+
        ena_wq = create_singlethread_workqueue(DRV_MODULE_NAME);
        if (!ena_wq) {
                pr_err("Failed to create workqueue\n");
                return -ENOMEM;
        }
 
-       return pci_register_driver(&ena_pci_driver);
+       ret = pci_register_driver(&ena_pci_driver);
+       if (ret)
+               destroy_workqueue(ena_wq);
+
+       return ret;
 }
 
 static void __exit ena_cleanup(void)