bus: imx-weim: fix branch condition evaluates to a garbage value

If bus type is other than imx50_weim_devtype and have no child devices,
variable 'ret' in function weim_parse_dt() will not be initialized, but
will be used as branch condition and return value. Fix this by
initializing 'ret' with 0.

This was discovered with help of clang-analyzer, but the situation is
quite possible in real life.

Fixes: 52c47b6 ("bus: imx-weim: improve error handling upon child probe-failure")
Signed-off-by: Ivan Bornyakov <[email protected]>
Cc: [email protected]
Reviewed-by: Fabio Estevam <[email protected]>
Signed-off-by: Shawn Guo <[email protected]>

Author: Ivan Bornyakov

drivers/bus/imx-weim.c

@@ -204,8 +204,8 @@ static int weim_parse_dt(struct platform_device *pdev)
 	const struct of_device_id *of_id = of_match_device(weim_id_table,
 							   &pdev->dev);
 	const struct imx_weim_devtype *devtype = of_id->data;
+	int ret = 0, have_child = 0;
 	struct device_node *child;
-	int ret, have_child = 0;
 	struct weim_priv *priv;
 	void __iomem *base;
 	u32 reg;