[PATCH 3.16 046/370] USB: phy: am335x-control: fix device and of_node leaks

Ben Hutchings
2017-03-10T14:30:51Z

From: Johan Hovold <johan@kernel.org>

commit 015105b12183556771e111e93f5266851e7c5582 upstream.

Make sure to drop the references taken by of_parse_phandle() and
bus_find_device() before returning from am335x_get_phy_control().

Note that there is no guarantee that the devres-managed struct
phy_control will be valid for the lifetime of the sibling phy device
regardless of this change.

Fixes: 3bb869c8b3f1 ("usb: phy: Add AM335x PHY driver")
Acked-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
drivers/usb/phy/phy-am335x-control.c | 2 ++
1 file changed, 2 insertions(+)

--- a/drivers/usb/phy/phy-am335x-control.c
+++ b/drivers/usb/phy/phy-am335x-control.c
@@ -126,10 +126,12 @@ struct phy_control *am335x_get_phy_contr
return NULL;

dev = bus_find_device(&platform_bus_type, NULL, node, match);
+ of_node_put(node);
if (!dev)
return NULL;

ctrl_usb = dev_get_drvdata(dev);
+ put_device(dev);
if (!ctrl_usb)
return NULL;
return &ctrl_usb->phy_ctrl;