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uwb: fix device reference leaks

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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: 183b9b592a ("uwb: add the UWB stack (core files)")
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Johan Hovold 2016-11-01 12:13:31 +01:00 committed by Greg Kroah-Hartman
parent afe4155ce9
commit d6124b409c
2 changed files with 15 additions and 3 deletions
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16
drivers/uwb/lc-rc.c
View file

@ -56,8 +56,11 @@ static struct uwb_rc *uwb_rc_find_by_index(int index)
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 @@ struct uwb_rc *__uwb_rc_try_get(struct uwb_rc *target_rc)
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 @@ struct uwb_rc *uwb_rc_get_by_grandpa(const struct device *grandpa_dev)
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 *uwb_rc_get_by_dev(const struct uwb_dev_addr *addr)
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;
}

2
drivers/uwb/pal.c
View file

@ -97,6 +97,8 @@ static bool uwb_rc_class_device_exists(struct uwb_rc *target_rc)
dev = class_find_device(&uwb_rc_class, NULL, target_rc, find_rc);
put_device(dev);
return (dev != NULL);
}