提交 f033c0bc 编写于 作者: P Philipp Zabel

of: Decrement refcount of previous endpoint in of_graph_get_next_endpoint

Decrementing the reference count of the previous endpoint node allows to
use the of_graph_get_next_endpoint function in a for_each_... style macro.
All current users of this function that pass a non-NULL prev parameter
(that is, soc_camera and imx-drm) are changed to not decrement the passed
prev argument's refcount themselves.
Signed-off-by: NPhilipp Zabel <p.zabel@pengutronix.de>
Acked-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>
Acked-by: NMathieu Poirier <mathieu.poirier@linaro.org>
Acked-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: NTomi Valkeinen <tomi.valkeinen@ti.com>
上级 c517d838
......@@ -52,15 +52,6 @@ of_coresight_get_endpoint_device(struct device_node *endpoint)
endpoint, of_dev_node_match);
}
static struct device_node *of_get_coresight_endpoint(
const struct device_node *parent, struct device_node *prev)
{
struct device_node *node = of_graph_get_next_endpoint(parent, prev);
of_node_put(prev);
return node;
}
static void of_coresight_get_ports(struct device_node *node,
int *nr_inport, int *nr_outport)
{
......@@ -68,7 +59,7 @@ static void of_coresight_get_ports(struct device_node *node,
int in = 0, out = 0;
do {
ep = of_get_coresight_endpoint(node, ep);
ep = of_graph_get_next_endpoint(node, ep);
if (!ep)
break;
......@@ -140,7 +131,7 @@ struct coresight_platform_data *of_get_coresight_platform_data(
/* Iterate through each port to discover topology */
do {
/* Get a handle on a port */
ep = of_get_coresight_endpoint(node, ep);
ep = of_graph_get_next_endpoint(node, ep);
if (!ep)
break;
......
......@@ -431,15 +431,6 @@ int imx_drm_encoder_parse_of(struct drm_device *drm,
}
EXPORT_SYMBOL_GPL(imx_drm_encoder_parse_of);
static struct device_node *imx_drm_of_get_next_endpoint(
const struct device_node *parent, struct device_node *prev)
{
struct device_node *node = of_graph_get_next_endpoint(parent, prev);
of_node_put(prev);
return node;
}
/*
* @node: device tree node containing encoder input ports
* @encoder: drm_encoder
......@@ -457,7 +448,7 @@ int imx_drm_encoder_get_mux_id(struct device_node *node,
return -EINVAL;
do {
ep = imx_drm_of_get_next_endpoint(node, ep);
ep = of_graph_get_next_endpoint(node, ep);
if (!ep)
break;
......
......@@ -206,7 +206,7 @@ static int rcar_du_encoders_init_one(struct rcar_du_device *rcdu,
enum rcar_du_encoder_type enc_type = RCAR_DU_ENCODER_NONE;
struct device_node *connector = NULL;
struct device_node *encoder = NULL;
struct device_node *prev = NULL;
struct device_node *ep_node = NULL;
struct device_node *entity_ep_node;
struct device_node *entity;
int ret;
......@@ -225,11 +225,7 @@ static int rcar_du_encoders_init_one(struct rcar_du_device *rcdu,
entity_ep_node = of_parse_phandle(ep->local_node, "remote-endpoint", 0);
while (1) {
struct device_node *ep_node;
ep_node = of_graph_get_next_endpoint(entity, prev);
of_node_put(prev);
prev = ep_node;
ep_node = of_graph_get_next_endpoint(entity, ep_node);
if (!ep_node)
break;
......@@ -300,7 +296,7 @@ static int rcar_du_encoders_init_one(struct rcar_du_device *rcdu,
static int rcar_du_encoders_init(struct rcar_du_device *rcdu)
{
struct device_node *np = rcdu->dev->of_node;
struct device_node *prev = NULL;
struct device_node *ep_node = NULL;
unsigned int num_encoders = 0;
/*
......@@ -308,15 +304,12 @@ static int rcar_du_encoders_init(struct rcar_du_device *rcdu)
* pipeline.
*/
while (1) {
struct device_node *ep_node;
enum rcar_du_output output;
struct of_endpoint ep;
unsigned int i;
int ret;
ep_node = of_graph_get_next_endpoint(np, prev);
of_node_put(prev);
prev = ep_node;
ep_node = of_graph_get_next_endpoint(np, ep_node);
if (ep_node == NULL)
break;
......
......@@ -2504,7 +2504,6 @@ vpfe_get_pdata(struct platform_device *pdev)
GFP_KERNEL);
pdata->asd[i]->match_type = V4L2_ASYNC_MATCH_OF;
pdata->asd[i]->match.of.node = rem;
of_node_put(endpoint);
of_node_put(rem);
}
......
......@@ -1694,7 +1694,6 @@ static void scan_of_host(struct soc_camera_host *ici)
if (!i)
soc_of_bind(ici, epn, ren->parent);
of_node_put(epn);
of_node_put(ren);
if (i) {
......@@ -1702,6 +1701,8 @@ static void scan_of_host(struct soc_camera_host *ici)
break;
}
}
of_node_put(epn);
}
#else
......
......@@ -2086,8 +2086,7 @@ EXPORT_SYMBOL(of_graph_parse_endpoint);
* @prev: previous endpoint node, or NULL to get first
*
* Return: An 'endpoint' node pointer with refcount incremented. Refcount
* of the passed @prev node is not decremented, the caller have to use
* of_node_put() on it when done.
* of the passed @prev node is decremented.
*/
struct device_node *of_graph_get_next_endpoint(const struct device_node *parent,
struct device_node *prev)
......@@ -2123,12 +2122,6 @@ struct device_node *of_graph_get_next_endpoint(const struct device_node *parent,
if (WARN_ONCE(!port, "%s(): endpoint %s has no parent node\n",
__func__, prev->full_name))
return NULL;
/*
* Avoid dropping prev node refcount to 0 when getting the next
* child below.
*/
of_node_get(prev);
}
while (1) {
......
......@@ -164,20 +164,15 @@ static void __init omapdss_walk_device(struct device_node *node, bool root)
pn = of_graph_get_remote_port_parent(n);
if (!pn) {
of_node_put(n);
if (!pn)
continue;
}
if (!of_device_is_available(pn) || omapdss_list_contains(pn)) {
of_node_put(pn);
of_node_put(n);
continue;
}
omapdss_walk_device(pn, false);
of_node_put(n);
}
}
......
Markdown is supported
0% .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑!
想要评论请 注册