From 3cd6e20f54d5003ea895717b67017397056749ce Mon Sep 17 00:00:00 2001 From: Nishka Dasgupta Date: Tue, 16 Jul 2019 11:18:43 +0530 Subject: [PATCH] net: ethernet: ti: cpsw: Add of_node_put() before return and break Each iteration of for_each_available_child_of_node puts the previous node, but in the case of a return or break from the middle of the loop, there is no put, thus causing a memory leak. Hence, for function cpsw_probe_dt, create an extra label err_node_put that puts the last used node and returns ret; modify the return statements in the loop to save the return value in ret and goto this new label. For function cpsw_remove_dt, add an of_node_put before the break. Issue found with Coccinelle. Signed-off-by: Nishka Dasgupta Signed-off-by: David S. Miller --- drivers/net/ethernet/ti/cpsw.c | 26 ++++++++++++++++++-------- 1 file changed, 18 insertions(+), 8 deletions(-) diff --git a/drivers/net/ethernet/ti/cpsw.c b/drivers/net/ethernet/ti/cpsw.c index f320f9a0de8b..32a89744972d 100644 --- a/drivers/net/ethernet/ti/cpsw.c +++ b/drivers/net/ethernet/ti/cpsw.c @@ -2570,7 +2570,7 @@ static int cpsw_probe_dt(struct cpsw_platform_data *data, ret = PTR_ERR(slave_data->ifphy); dev_err(&pdev->dev, "%d: Error retrieving port phy: %d\n", i, ret); - return ret; + goto err_node_put; } slave_data->slave_node = slave_node; @@ -2589,7 +2589,7 @@ static int cpsw_probe_dt(struct cpsw_platform_data *data, if (ret) { if (ret != -EPROBE_DEFER) dev_err(&pdev->dev, "failed to register fixed-link phy: %d\n", ret); - return ret; + goto err_node_put; } slave_data->phy_node = of_node_get(slave_node); } else if (parp) { @@ -2607,7 +2607,8 @@ static int cpsw_probe_dt(struct cpsw_platform_data *data, of_node_put(mdio_node); if (!mdio) { dev_err(&pdev->dev, "Missing mdio platform device\n"); - return -EINVAL; + ret = -EINVAL; + goto err_node_put; } snprintf(slave_data->phy_id, sizeof(slave_data->phy_id), PHY_ID_FMT, mdio->name, phyid); @@ -2622,7 +2623,8 @@ static int cpsw_probe_dt(struct cpsw_platform_data *data, if (slave_data->phy_if < 0) { dev_err(&pdev->dev, "Missing or malformed slave[%d] phy-mode property\n", i); - return slave_data->phy_if; + ret = slave_data->phy_if; + goto err_node_put; } no_phy_slave: @@ -2633,7 +2635,7 @@ no_phy_slave: ret = ti_cm_get_macid(&pdev->dev, i, slave_data->mac_addr); if (ret) - return ret; + goto err_node_put; } if (data->dual_emac) { if (of_property_read_u32(slave_node, "dual_emac_res_vlan", @@ -2648,11 +2650,17 @@ no_phy_slave: } i++; - if (i == data->slaves) - break; + if (i == data->slaves) { + ret = 0; + goto err_node_put; + } } return 0; + +err_node_put: + of_node_put(slave_node); + return ret; } static void cpsw_remove_dt(struct platform_device *pdev) @@ -2675,8 +2683,10 @@ static void cpsw_remove_dt(struct platform_device *pdev) of_node_put(slave_data->phy_node); i++; - if (i == data->slaves) + if (i == data->slaves) { + of_node_put(slave_node); break; + } } of_platform_depopulate(&pdev->dev); -- 2.30.2