syscon: Avoid returning a device on failure

If the device cannot be probed, syscon_get_by_driver_data() will still
return a useful value in its devp parameter. Ensure that it returns NULL
instead.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

diff --git a/drivers/core/syscon-uclass.c b/drivers/core/syscon-uclass.c
index a0666d0..e03f46a 100644 (file)
--- a/drivers/core/syscon-uclass.c
+++ b/drivers/core/syscon-uclass.c
@@ -38,6 +38,7 @@ int syscon_get_by_driver_data(ulong driver_data, struct udevice **devp)
        struct uclass *uc;
        int ret;
 
+       *devp = NULL;
        ret = uclass_get(UCLASS_SYSCON, &uc);
        if (ret)
                return ret;