From: Johan Hovold <johan@xxxxxxxxxx>
This patch has been added to the 3.12 stable tree. If you have any
objections, please let us know.
===============
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@xxxxxxxxxx>
Signed-off-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
---
arch/powerpc/kernel/ibmebus.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/kernel/ibmebus.c b/arch/powerpc/kernel/ibmebus.c
index 435c9bbc6b09..bc47b7986e37 100644
--- a/arch/powerpc/kernel/ibmebus.c
+++ b/arch/powerpc/kernel/ibmebus.c
@@ -266,6 +266,7 @@ static ssize_t ibmebus_store_probe(struct bus_type *bus,
const char *buf, size_t count)
{
struct device_node *dn = NULL;
+ struct device *dev;
char *path;
ssize_t rc = 0;
@@ -273,8 +274,10 @@ static ssize_t ibmebus_store_probe(struct bus_type *bus,
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;
@@ -310,6 +313,7 @@ static ssize_t ibmebus_store_remove(struct bus_type *bus,
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;
--
2.11.0
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