gpu: ipu-v3: prg: fix device node leak in ipu_prg_lookup_by_phandle

BugLink: http://bugs.launchpad.net/bugs/1786352
[ Upstream commit 3addaba8141bc6a4f649a48f46e552af32922147 ]

Before returning, call of_node_put() for the device node returned by
of_parse_phandle().

Fixes: ea9c260514c1 ("gpu: ipu-v3: add driver for Prefetch Resolve Gasket")
Signed-off-by: Tobias Jordan <Tobias.Jordan@elektrobit.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Khalid Elmously <khalid.elmously@canonical.com>

diff --git a/drivers/gpu/ipu-v3/ipu-prg.c b/drivers/gpu/ipu-v3/ipu-prg.c
index 0013ca9f72c83e8f85b3c91aa62aaf619690f234..cbccce8e594b5a73edb085ac01565cb457c24cd4 100644 (file)
--- a/drivers/gpu/ipu-v3/ipu-prg.c
+++ b/drivers/gpu/ipu-v3/ipu-prg.c
@@ -101,11 +101,14 @@ ipu_prg_lookup_by_phandle(struct device *dev, const char *name, int ipu_id)
                        mutex_unlock(&ipu_prg_list_mutex);
                        device_link_add(dev, prg->dev, DL_FLAG_AUTOREMOVE);
                        prg->id = ipu_id;
+                       of_node_put(prg_node);
                        return prg;
                }
        }
        mutex_unlock(&ipu_prg_list_mutex);
 
+       of_node_put(prg_node);
+
        return NULL;
 }