media: atmel-isc: avoid returning a random value at isc_parse_dt()

As warned by smatch:
drivers/media/platform/atmel/atmel-isc.c:2097 isc_parse_dt() error: uninitialized symbol 'ret'.

The problem here is that of_graph_get_next_endpoint() can
potentially return NULL on its first pass, with would make
it return a random value, as ret is not initialized.

While here, use while(1) instead of for(; ;), as while is
the preferred syntax for such kind of loops.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

diff --git a/drivers/media/platform/atmel/atmel-isc.c b/drivers/media/platform/atmel/atmel-isc.c
index 13f1c1c..0c26356 100644 (file)
--- a/drivers/media/platform/atmel/atmel-isc.c
+++ b/drivers/media/platform/atmel/atmel-isc.c
@@ -2039,10 +2039,10 @@ static int isc_parse_dt(struct device *dev, struct isc_device *isc)
 
        INIT_LIST_HEAD(&isc->subdev_entities);
 
-       for (; ;) {
+       while (1) {
                epn = of_graph_get_next_endpoint(np, epn);
                if (!epn)
-                       break;
+                       return 0;
 
                rem = of_graph_get_remote_port_parent(epn);
                if (!rem) {