From 1d39d02a1535658962f9370312be7b2d634946a5 Mon Sep 17 00:00:00 2001 From: Javier Carrasco Date: Mon, 30 Sep 2024 22:38:25 +0200 Subject: net: mdio: thunder: switch to scoped device_for_each_child_node() There has already been an issue with the handling of early exits from device_for_each_child() in this driver, and it was solved with commit b1de5c78ebe9 ("net: mdio: thunder: Add missing fwnode_handle_put()") by adding a call to fwnode_handle_put() right after the loop. That solution is valid indeed, but if a new error path with a 'return' is added to the loop, this solution will fail. A more secure approach is using the scoped variant of the macro, which automatically decrements the refcount of the child node when it goes out of scope, removing the need for explicit calls to fwnode_handle_put(). Signed-off-by: Javier Carrasco Link: https://patch.msgid.link/20240930-net-device_for_each_child_node_scoped-v2-1-35f09333c1d7@gmail.com Signed-off-by: Jakub Kicinski --- drivers/net/mdio/mdio-thunder.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/drivers/net/mdio/mdio-thunder.c b/drivers/net/mdio/mdio-thunder.c index 6067d96b2b7b..1e1aa72b1eff 100644 --- a/drivers/net/mdio/mdio-thunder.c +++ b/drivers/net/mdio/mdio-thunder.c @@ -23,7 +23,6 @@ static int thunder_mdiobus_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) { struct device_node *node; - struct fwnode_handle *fwn; struct thunder_mdiobus_nexus *nexus; int err; int i; @@ -54,7 +53,7 @@ static int thunder_mdiobus_pci_probe(struct pci_dev *pdev, } i = 0; - device_for_each_child_node(&pdev->dev, fwn) { + device_for_each_child_node_scoped(&pdev->dev, fwn) { struct resource r; struct mii_bus *mii_bus; struct cavium_mdiobus *bus; @@ -106,7 +105,6 @@ static int thunder_mdiobus_pci_probe(struct pci_dev *pdev, if (i >= ARRAY_SIZE(nexus->buses)) break; } - fwnode_handle_put(fwn); return 0; err_release_regions: -- cgit v1.2.3 From e97dccd3e976331cd2c9fa17fcb716af19bd5c68 Mon Sep 17 00:00:00 2001 From: Javier Carrasco Date: Mon, 30 Sep 2024 22:38:26 +0200 Subject: net: hns: hisilicon: hns_dsaf_mac: switch to scoped device_for_each_child_node() Use device_for_each_child_node_scoped() to simplify the code by removing the need for explicit calls to fwnode_handle_put() in every error path. This approach also accounts for any error path that could be added. Signed-off-by: Javier Carrasco Link: https://patch.msgid.link/20240930-net-device_for_each_child_node_scoped-v2-2-35f09333c1d7@gmail.com Signed-off-by: Jakub Kicinski --- drivers/net/ethernet/hisilicon/hns/hns_dsaf_mac.c | 10 +++------- 1 file changed, 3 insertions(+), 7 deletions(-) diff --git a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_mac.c b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_mac.c index 58baac7103b3..5fa9b2eeb929 100644 --- a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_mac.c +++ b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_mac.c @@ -1090,28 +1090,24 @@ int hns_mac_init(struct dsaf_device *dsaf_dev) u32 port_id; int max_port_num = hns_mac_get_max_port_num(dsaf_dev); struct hns_mac_cb *mac_cb; - struct fwnode_handle *child; - device_for_each_child_node(dsaf_dev->dev, child) { + device_for_each_child_node_scoped(dsaf_dev->dev, child) { ret = fwnode_property_read_u32(child, "reg", &port_id); if (ret) { - fwnode_handle_put(child); dev_err(dsaf_dev->dev, "get reg fail, ret=%d!\n", ret); return ret; } if (port_id >= max_port_num) { - fwnode_handle_put(child); dev_err(dsaf_dev->dev, "reg(%u) out of range!\n", port_id); return -EINVAL; } mac_cb = devm_kzalloc(dsaf_dev->dev, sizeof(*mac_cb), GFP_KERNEL); - if (!mac_cb) { - fwnode_handle_put(child); + if (!mac_cb) return -ENOMEM; - } + mac_cb->fw_port = child; mac_cb->mac_id = (u8)port_id; dsaf_dev->mac_cb[port_id] = mac_cb; -- cgit v1.2.3