[PATCH 1/2] bbu: fix bbu_register_std_file_update regression for file systems

[Ahmad Fatoum]

The code used to handle any path equally well, but then it was broken
for paths that don't start with /dev, i.e. anything in a filesystem.

Add an explicit /dev check before going into the newer code, so
bbu_register_std_file_update can once again be called with paths
that start with /mnt for example. Previously, this resulted in following
error message:

  bbu: Skipping handler bbu-MLO.fat.emmc: /dev//mnt/mmc1.0/barebox.bin 
unavailable

Fixes: df22a22f84b6 ("bbu: fix exporting i.MX NAND bbu handler over fastboot")
Signed-off-by: Ahmad Fatoum <a.fat...@pengutronix.de>
---
 common/bbu.c | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/common/bbu.c b/common/bbu.c
index 9ea8a1a3f247..ba550f925608 100644
--- a/common/bbu.c
+++ b/common/bbu.c
@@ -43,14 +43,18 @@ void bbu_append_handlers_to_file_list(struct file_list 
*files)
        struct bbu_handler *handler;
 
        list_for_each_entry(handler, &bbu_image_handlers, list) {
-               const char *cdevname;
+               const char *cdevname, *devpath;
+               char *buf = NULL;
                struct stat s;
-               char *devpath;
 
-               cdevname = devpath_to_name(handler->devicefile);
-               device_detect_by_name(cdevname);
+               devpath = handler->devicefile;
 
-               devpath = basprintf("/dev/%s", cdevname);
+               if (strstarts(devpath, "/dev/")) {
+                       cdevname = devpath_to_name(devpath);
+                       device_detect_by_name(cdevname);
+
+                       devpath = buf = basprintf("/dev/%s", cdevname);
+               }
 
                if (stat(devpath, &s) == 0) {
                        append_bbu_entry(handler->name, devpath, files);
@@ -59,7 +63,7 @@ void bbu_append_handlers_to_file_list(struct file_list *files)
                                handler->name, devpath);
                }
 
-               free(devpath);
+               free(buf);
        }
 }
 
-- 
2.39.5