uwb: fix device reference leaks
commit d6124b409ca33c100170ffde51cd8dff761454a1 upstream.
This subsystem consistently fails to drop the device reference taken by
class_find_device().
Note that some of these lookup functions already take a reference to the
returned data, while others claim no reference is needed (or does not
seem need one).
Fixes: 183b9b592a62 ("uwb: add the UWB stack (core files)")
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/uwb/lc-rc.c b/drivers/uwb/lc-rc.c
index d059ad4..97ee1b4 100644
--- a/drivers/uwb/lc-rc.c
+++ b/drivers/uwb/lc-rc.c
@@ -56,8 +56,11 @@
struct uwb_rc *rc = NULL;
dev = class_find_device(&uwb_rc_class, NULL, &index, uwb_rc_index_match);
- if (dev)
+ if (dev) {
rc = dev_get_drvdata(dev);
+ put_device(dev);
+ }
+
return rc;
}
@@ -467,7 +470,9 @@
if (dev) {
rc = dev_get_drvdata(dev);
__uwb_rc_get(rc);
+ put_device(dev);
}
+
return rc;
}
EXPORT_SYMBOL_GPL(__uwb_rc_try_get);
@@ -520,8 +525,11 @@
dev = class_find_device(&uwb_rc_class, NULL, grandpa_dev,
find_rc_grandpa);
- if (dev)
+ if (dev) {
rc = dev_get_drvdata(dev);
+ put_device(dev);
+ }
+
return rc;
}
EXPORT_SYMBOL_GPL(uwb_rc_get_by_grandpa);
@@ -553,8 +561,10 @@
struct uwb_rc *rc = NULL;
dev = class_find_device(&uwb_rc_class, NULL, addr, find_rc_dev);
- if (dev)
+ if (dev) {
rc = dev_get_drvdata(dev);
+ put_device(dev);
+ }
return rc;
}
diff --git a/drivers/uwb/pal.c b/drivers/uwb/pal.c
index c1304b8..678e937 100644
--- a/drivers/uwb/pal.c
+++ b/drivers/uwb/pal.c
@@ -97,6 +97,8 @@
dev = class_find_device(&uwb_rc_class, NULL, target_rc, find_rc);
+ put_device(dev);
+
return (dev != NULL);
}
