powerpc/ibmebus: Fix device reference leaks in sysfs interface
commit fe0f3168169f7c34c29b0cf0c489f126a7f29643 upstream.
Make sure to drop any reference taken by bus_find_device() in the sysfs
callbacks that are used to create and destroy devices based on
device-tree entries.
Fixes: 6bccf755ff53 ("[POWERPC] ibmebus: dynamic addition/removal of adapters, some code cleanup")
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/arch/powerpc/kernel/ibmebus.c b/arch/powerpc/kernel/ibmebus.c
index 0379ddf..35f5244 100644
--- a/arch/powerpc/kernel/ibmebus.c
+++ b/arch/powerpc/kernel/ibmebus.c
@@ -266,6 +266,7 @@
const char *buf, size_t count)
{
struct device_node *dn = NULL;
+ struct device *dev;
char *path;
ssize_t rc = 0;
@@ -273,8 +274,10 @@
if (!path)
return -ENOMEM;
- if (bus_find_device(&ibmebus_bus_type, NULL, path,
- ibmebus_match_path)) {
+ dev = bus_find_device(&ibmebus_bus_type, NULL, path,
+ ibmebus_match_path);
+ if (dev) {
+ put_device(dev);
printk(KERN_WARNING "%s: %s has already been probed\n",
__func__, path);
rc = -EEXIST;
@@ -311,6 +314,7 @@
if ((dev = bus_find_device(&ibmebus_bus_type, NULL, path,
ibmebus_match_path))) {
of_device_unregister(to_platform_device(dev));
+ put_device(dev);
kfree(path);
return count;