videomode: don't allocate mem in of_get_display_timing()

Move the allocation of display_timing memory from of_get_display_timing() to
of_get_display_timings(). This allows us to use of_get_display_timing()
in a way that doesn't require dynamic memory allocation.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc: Steffen Trumtrar <s.trumtrar@pengutronix.de>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Philipp Zabel <p.zabel@pengutronix.de>

diff --git a/drivers/video/of_display_timing.c b/drivers/video/of_display_timing.c
index 56009bc..0e81023 100644 (file)
--- a/drivers/video/of_display_timing.c
+++ b/drivers/video/of_display_timing.c
@@ -56,18 +56,13 @@ static int parse_timing_property(struct device_node *np, const char *name,
  * of_get_display_timing - parse display_timing entry from device_node
  * @np: device_node with the properties
  **/
-static struct display_timing *of_get_display_timing(struct device_node *np)
+static int of_get_display_timing(struct device_node *np,
+               struct display_timing *dt)
 {
-       struct display_timing *dt;
        u32 val = 0;
        int ret = 0;
 
-       dt = kzalloc(sizeof(*dt), GFP_KERNEL);
-       if (!dt) {
-               pr_err("%s: could not allocate display_timing struct\n",
-                       of_node_full_name(np));
-               return NULL;
-       }
+       memset(dt, 0, sizeof(*dt));
 
        ret |= parse_timing_property(np, "hback-porch", &dt->hback_porch);
        ret |= parse_timing_property(np, "hfront-porch", &dt->hfront_porch);
@@ -101,11 +96,10 @@ static struct display_timing *of_get_display_timing(struct device_node *np)
        if (ret) {
                pr_err("%s: error reading timing properties\n",
                        of_node_full_name(np));
-               kfree(dt);
-               return NULL;
+               return -EINVAL;
        }
 
-       return dt;
+       return 0;
 }
 
 /**
@@ -174,9 +168,17 @@ struct display_timings *of_get_display_timings(struct device_node *np)
 
        for_each_child_of_node(timings_np, entry) {
                struct display_timing *dt;
+               int r;
 
-               dt = of_get_display_timing(entry);
+               dt = kzalloc(sizeof(*dt), GFP_KERNEL);
                if (!dt) {
+                       pr_err("%s: could not allocate display_timing struct\n",
+                                       of_node_full_name(np));
+                       goto timingfail;
+               }
+
+               r = of_get_display_timing(entry, dt);
+               if (r) {
                        /*
                         * to not encourage wrong devicetrees, fail in case of
                         * an error