[PATCH 3.16 214/306] net: ethernet: ti: cpsw: fix device and of_node leaks

From: Ben Hutchings
Date: Wed Feb 15 2017 - 19:18:53 EST

3.16.40-rc1 review patch. If anyone has any objections, please let me know.


From: Johan Hovold <johan@xxxxxxxxxx>

commit c7262aaace1b17a650598063e3b9ee1785fde377 upstream.

Make sure to drop the references taken by of_get_child_by_name() and
bus_find_device() before returning from cpsw_phy_sel().

Note that holding a reference to the cpsw-phy-sel device does not
prevent the devres-managed private data from going away.

Fixes: 5892cd135e16 ("drivers: net: cpsw-phy-sel: Add new driver...")
Cc: Mugunthan V N <mugunthanvnm@xxxxxx>
Cc: Grygorii Strashko <grygorii.strashko@xxxxxx>
Cc: linux-omap@xxxxxxxxxxxxxxx
Signed-off-by: Johan Hovold <johan@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
drivers/net/ethernet/ti/cpsw-phy-sel.c | 3 +++
1 file changed, 3 insertions(+)

--- a/drivers/net/ethernet/ti/cpsw-phy-sel.c
+++ b/drivers/net/ethernet/ti/cpsw-phy-sel.c
@@ -152,9 +152,12 @@ void cpsw_phy_sel(struct device *dev, ph

dev = bus_find_device(&platform_bus_type, NULL, node, match);
+ of_node_put(node);
priv = dev_get_drvdata(dev);

priv->cpsw_phy_sel(priv, phy_mode, slave);
+ put_device(dev);