From: Liang He windhl@126.com
[ Upstream commit 49b9f431ff0d845a36be0b3ede35ec324f2e5fee ]
In ftgmac100_probe(), we should hold the refernece returned by of_get_child_by_name() and use it to call of_node_put() for reference balance.
Fixes: 39bfab8844a0 ("net: ftgmac100: Add support for DT phy-handle property") Signed-off-by: Liang He windhl@126.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/ethernet/faraday/ftgmac100.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/faraday/ftgmac100.c b/drivers/net/ethernet/faraday/ftgmac100.c index 5231818943c6..c03663785a8d 100644 --- a/drivers/net/ethernet/faraday/ftgmac100.c +++ b/drivers/net/ethernet/faraday/ftgmac100.c @@ -1764,6 +1764,19 @@ static int ftgmac100_setup_clk(struct ftgmac100 *priv) return rc; }
+static bool ftgmac100_has_child_node(struct device_node *np, const char *name) +{ + struct device_node *child_np = of_get_child_by_name(np, name); + bool ret = false; + + if (child_np) { + ret = true; + of_node_put(child_np); + } + + return ret; +} + static int ftgmac100_probe(struct platform_device *pdev) { struct resource *res; @@ -1883,7 +1896,7 @@ static int ftgmac100_probe(struct platform_device *pdev)
/* Display what we found */ phy_attached_info(phy); - } else if (np && !of_get_child_by_name(np, "mdio")) { + } else if (np && !ftgmac100_has_child_node(np, "mdio")) { /* Support legacy ASPEED devicetree descriptions that decribe a * MAC with an embedded MDIO controller but have no "mdio" * child node. Automatically scan the MDIO bus for available