[RFC 5/8] boot: prevent recursion in bootdev_hunt_drv()

[Heinrich Schuchardt]

If an implementation of the hunt() method calls bootdev_hunt() itself,
an infinite recursion may occur.

Set the sequence bit before invoking hunt().

Signed-off-by: Heinrich Schuchardt <heinrich.schucha...@canonical.com>
---
 boot/bootdev-uclass.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/boot/bootdev-uclass.c b/boot/bootdev-uclass.c
index 3791ebfcb42..da757a49481 100644
--- a/boot/bootdev-uclass.c
+++ b/boot/bootdev-uclass.c
@@ -791,6 +791,7 @@ static int bootdev_hunt_drv(struct bootdev_hunter *info, 
uint seq, bool show)
                return log_msg_ret("std", ret);
 
        if (!(std->hunters_used & BIT(seq))) {
+               std->hunters_used |= BIT(seq);
                if (show)
                        printf("Hunting with: %s\n",
                               uclass_get_name(info->uclass));
@@ -801,7 +802,6 @@ static int bootdev_hunt_drv(struct bootdev_hunter *info, 
uint seq, bool show)
                        if (ret && ret != -ENOENT)
                                return ret;
                }
-               std->hunters_used |= BIT(seq);
        }
 
        return 0;
-- 
2.48.1