From: Wen Yang <wen.yang99@zte.com.cn>
To: linux-kernel@vger.kernel.org
Cc: wang.yi59@zte.com.cn, Wen Yang <wen.yang99@zte.com.cn>,
Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>,
David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
dri-devel@lists.freedesktop.org,
linux-renesas-soc@vger.kernel.org
Subject: [PATCH v2] drm: rcar-du: fix possible object reference leak
Date: Mon, 8 Apr 2019 10:58:33 +0800 [thread overview]
Message-ID: <1554692313-28882-3-git-send-email-wen.yang99@zte.com.cn> (raw)
In-Reply-To: <1554692313-28882-1-git-send-email-wen.yang99@zte.com.cn>
The call to of_get_parent returns a node pointer with refcount
incremented thus it must be explicitly decremented after the last
usage.
Detected by coccinelle with the following warnings:
drivers/gpu/drm/rcar-du/rcar_du_of.c:235:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 216, but without a corresponding object release within this function.
drivers/gpu/drm/rcar-du/rcar_du_of.c:236:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 209, but without a corresponding object release within this function.
Signed-off-by: Wen Yang <wen.yang99@zte.com.cn>
Suggested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: dri-devel@lists.freedesktop.org
Cc: linux-renesas-soc@vger.kernel.org
Cc: linux-kernel@vger.kernel.org (open list)
---
v2->v1: turn the return into a goto done.
drivers/gpu/drm/rcar-du/rcar_du_of.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_of.c b/drivers/gpu/drm/rcar-du/rcar_du_of.c
index afef696..782bfc7 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_of.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_of.c
@@ -232,7 +232,7 @@ static void __init rcar_du_of_lvds_patch(const struct of_device_id *of_ids)
lvds_node = of_find_compatible_node(NULL, NULL, compatible);
if (lvds_node) {
of_node_put(lvds_node);
- return;
+ goto done;
}
/*
--
2.9.5
next prev parent reply other threads:[~2019-04-08 2:57 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-08 2:58 [PATCH v2] drm/meson: fix possible object reference leak Wen Yang
2019-04-08 2:58 ` [PATCH v2] drm/omap: " Wen Yang
2019-04-08 8:49 ` Mukesh Ojha
2019-04-08 2:58 ` Wen Yang [this message]
2019-04-08 8:45 ` [PATCH v2] drm: rcar-du: " Mukesh Ojha
2019-04-08 16:38 ` Markus Elfring
2019-04-08 9:13 ` [PATCH v2] drm/meson: " Markus Elfring
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1554692313-28882-3-git-send-email-wen.yang99@zte.com.cn \
--to=wen.yang99@zte.com.cn \
--cc=airlied@linux.ie \
--cc=daniel@ffwll.ch \
--cc=dri-devel@lists.freedesktop.org \
--cc=kieran.bingham+renesas@ideasonboard.com \
--cc=laurent.pinchart@ideasonboard.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-renesas-soc@vger.kernel.org \
--cc=wang.yi59@zte.com.cn \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).