4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Johan Hovold <johan@xxxxxxxxxx>
commit 815a7141c4d1b11610dccb7fcbb38633759824f2 upstream.
Make sure to drop any reference taken by bus_find_device() when creating
devices during init and driver registration.
Fixes: 55347cc9962f ("[POWERPC] ibmebus: Add device creation and bus probing based on of_device")
Signed-off-by: Johan Hovold <johan@xxxxxxxxxx>
Signed-off-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/powerpc/kernel/ibmebus.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
--- a/arch/powerpc/kernel/ibmebus.c
+++ b/arch/powerpc/kernel/ibmebus.c
@@ -180,6 +180,7 @@ static int ibmebus_create_device(struct
static int ibmebus_create_devices(const struct of_device_id *matches)
{
struct device_node *root, *child;
+ struct device *dev;
int ret = 0;
root = of_find_node_by_path("/");
@@ -188,9 +189,12 @@ static int ibmebus_create_devices(const
if (!of_match_node(matches, child))
continue;
- if (bus_find_device(&ibmebus_bus_type, NULL, child,
- ibmebus_match_node))
+ dev = bus_find_device(&ibmebus_bus_type, NULL, child,
+ ibmebus_match_node);
+ if (dev) {
+ put_device(dev);
continue;
+ }
ret = ibmebus_create_device(child);
if (ret) {
--
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