Patch "net: liquidio: release resources when liquidio driver open failed" has been added to the 5.15-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    net: liquidio: release resources when liquidio driver open failed

to the 5.15-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     net-liquidio-release-resources-when-liquidio-driver-.patch
and it can be found in the queue-5.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit dc823f4efb84ee4e3f6c8c0090b7d10108c8cc43
Author: Zhengchao Shao <shaozhengchao@xxxxxxxxxx>
Date:   Thu Nov 10 18:30:37 2022 +0800

    net: liquidio: release resources when liquidio driver open failed
    
    [ Upstream commit 8979f428a4afc215e390006e5ea19fd4e22c7ca9 ]
    
    When liquidio driver open failed, it doesn't release resources. Compile
    tested only.
    
    Fixes: 5b07aee11227 ("liquidio: MSIX support for CN23XX")
    Fixes: dbc97bfd3918 ("net: liquidio: Add missing null pointer checks")
    Signed-off-by: Zhengchao Shao <shaozhengchao@xxxxxxxxxx>
    Reviewed-by: Leon Romanovsky <leonro@xxxxxxxxxx>
    Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/net/ethernet/cavium/liquidio/lio_main.c b/drivers/net/ethernet/cavium/liquidio/lio_main.c
index 2907e13b9df6..7bd97d98afeb 100644
--- a/drivers/net/ethernet/cavium/liquidio/lio_main.c
+++ b/drivers/net/ethernet/cavium/liquidio/lio_main.c
@@ -1798,13 +1798,10 @@ static int liquidio_open(struct net_device *netdev)
 
 	ifstate_set(lio, LIO_IFSTATE_RUNNING);
 
-	if (OCTEON_CN23XX_PF(oct)) {
-		if (!oct->msix_on)
-			if (setup_tx_poll_fn(netdev))
-				return -1;
-	} else {
-		if (setup_tx_poll_fn(netdev))
-			return -1;
+	if (!OCTEON_CN23XX_PF(oct) || (OCTEON_CN23XX_PF(oct) && !oct->msix_on)) {
+		ret = setup_tx_poll_fn(netdev);
+		if (ret)
+			goto err_poll;
 	}
 
 	netif_tx_start_all_queues(netdev);
@@ -1817,7 +1814,7 @@ static int liquidio_open(struct net_device *netdev)
 	/* tell Octeon to start forwarding packets to host */
 	ret = send_rx_ctrl_cmd(lio, 1);
 	if (ret)
-		return ret;
+		goto err_rx_ctrl;
 
 	/* start periodical statistics fetch */
 	INIT_DELAYED_WORK(&lio->stats_wk.work, lio_fetch_stats);
@@ -1828,6 +1825,27 @@ static int liquidio_open(struct net_device *netdev)
 	dev_info(&oct->pci_dev->dev, "%s interface is opened\n",
 		 netdev->name);
 
+	return 0;
+
+err_rx_ctrl:
+	if (!OCTEON_CN23XX_PF(oct) || (OCTEON_CN23XX_PF(oct) && !oct->msix_on))
+		cleanup_tx_poll_fn(netdev);
+err_poll:
+	if (lio->ptp_clock) {
+		ptp_clock_unregister(lio->ptp_clock);
+		lio->ptp_clock = NULL;
+	}
+
+	if (oct->props[lio->ifidx].napi_enabled == 1) {
+		list_for_each_entry_safe(napi, n, &netdev->napi_list, dev_list)
+			napi_disable(napi);
+
+		oct->props[lio->ifidx].napi_enabled = 0;
+
+		if (OCTEON_CN23XX_PF(oct))
+			oct->droq[0]->ops.poll_mode = 0;
+	}
+
 	return ret;
 }