linux-kernel - [PATCH] kobject: Improve doc clarity kobject_init_and

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Message-Id: <20190427235652.3799-1-tobin@kernel.org>
Date:   Sun, 28 Apr 2019 09:56:52 +1000
From:   "Tobin C. Harding" <tobin@...nel.org>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>
Cc:     "Tobin C. Harding" <tobin@...nel.org>, linux-kernel@...r.kernel.org
Subject: [PATCH] kobject: Improve doc clarity kobject_init_and_add()

Function kobject_init_and_add() is currently misused in a number of
places in the kernel.  On error return kobject_put() must be called but
is at times not.

Make the function documentation more explicit about calling
kobject_put() in the error path.

Signed-off-by: Tobin C. Harding <tobin@...nel.org>
---
 lib/kobject.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/lib/kobject.c b/lib/kobject.c
index aa89edcd2b63..58d1d7a64203 100644
--- a/lib/kobject.c
+++ b/lib/kobject.c
@@ -437,9 +437,12 @@ EXPORT_SYMBOL(kobject_add);
  * @parent: pointer to the parent of this kobject.
  * @fmt: the name of the kobject.
  *
- * This function combines the call to kobject_init() and
- * kobject_add().  The same type of error handling after a call to
- * kobject_add() and kobject lifetime rules are the same here.
+ * This function combines the call to kobject_init() and kobject_add().
+ *
+ * If this function returns an error, kobject_put() must be called to
+ * properly clean up the memory associated with the object.  This is the
+ * same type of error handling after a call to kobject_add() and kobject
+ * lifetime rules are the same here.
  */
 int kobject_init_and_add(struct kobject *kobj, struct kobj_type *ktype,
 			 struct kobject *parent, const char *fmt, ...)
-- 
2.21.0