ethernet: stmicro: stmmac: add missing of_node_put after calling of_parse_phandle

of_node_put needs to be called when the device node which is got
from of_parse_phandle has finished using.

This commit fixes both local (in stmmac_axi_setup) and global
(plat->phy_node) device_node for this issue, and using the
correct device node when tries to put node at stmmac_probe_config_dt
for error path.

Signed-off-by: Peter Chen <peter.chen@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 6 insertions, 2 deletions

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index c23ccabc2d8a..4c8c60af7985 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -3397,6 +3397,7 @@ int stmmac_dvr_remove(struct device *dev)
         stmmac_set_mac(priv->ioaddr, false);
         netif_carrier_off(ndev);
         unregister_netdev(ndev);
+        of_node_put(priv->plat->phy_node);
         if (priv->stmmac_rst)
                 reset_control_assert(priv->stmmac_rst);
         clk_disable_unprepare(priv->pclk);
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
index f7dfc0ae8e9c..756bb548e81a 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
@@ -113,8 +113,10 @@ static struct stmmac_axi *stmmac_axi_setup(struct platform_device *pdev)
                 return NULL;
 
         axi = kzalloc(sizeof(*axi), GFP_KERNEL);
-        if (!axi)
+        if (!axi) {
+                of_node_put(np);
                 return ERR_PTR(-ENOMEM);
+        }
 
         axi->axi_lpi_en = of_property_read_bool(np, "snps,lpi_en");
         axi->axi_xit_frm = of_property_read_bool(np, "snps,xit_frm");
@@ -127,6 +129,7 @@ static struct stmmac_axi *stmmac_axi_setup(struct platform_device *pdev)
         of_property_read_u32(np, "snps,wr_osr_lmt", &axi->axi_wr_osr_lmt);
         of_property_read_u32(np, "snps,rd_osr_lmt", &axi->axi_rd_osr_lmt);
         of_property_read_u32_array(np, "snps,blen", axi->axi_blen, AXI_BLEN);
+        of_node_put(np);
 
         return axi;
 }
@@ -302,7 +305,7 @@ stmmac_probe_config_dt(struct platform_device *pdev, const char **mac)
                 dma_cfg = devm_kzalloc(&pdev->dev, sizeof(*dma_cfg),
                                        GFP_KERNEL);
                 if (!dma_cfg) {
-                        of_node_put(np);
+                        of_node_put(plat->phy_node);
                         return ERR_PTR(-ENOMEM);
                 }
                 plat->dma_cfg = dma_cfg;