[PATCH 7/7] bootm: use cdev_open_by_name()

[Sascha Hauer]

cdev_by_name() returns a cdev without increasing its reference count. In
order to maintain a proper reference counting use cdev_open_by_name()
instead and make sure it's closed afterwards when no longer needed.

Signed-off-by: Sascha Hauer <s.ha...@pengutronix.de>
---
 common/bootm.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/common/bootm.c b/common/bootm.c
index c851ab0456..357537c54e 100644
--- a/common/bootm.c
+++ b/common/bootm.c
@@ -760,7 +760,7 @@ int bootm_boot(struct bootm_data *bootm_data)
 
                if (bootm_data->root_dev) {
                        const char *root_dev_name = 
devpath_to_name(bootm_data->root_dev);
-                       const struct cdev *root_cdev = 
cdev_by_name(root_dev_name);
+                       struct cdev *root_cdev = 
cdev_open_by_name(root_dev_name, O_RDONLY);
 
                        rootarg = cdev_get_linux_rootarg(root_cdev);
                        if (!rootarg) {
@@ -773,6 +773,9 @@ int bootm_boot(struct bootm_data *bootm_data)
                                        pr_err("%s doesn't have a PARTUUID, 
cannot set root= option\n",
                                                root_dev_name);
                        }
+
+                       if (root_cdev)
+                               cdev_close(root_cdev);
                } else {
                        rootarg = path_get_linux_rootarg(data->os_file);
                }
-- 
2.39.2