[PATCH BlueZ 4/5] player: Report EBUSY from a busy Search()

media_folder_search() answered a request that arrived while another one
was still pending with EINVAL, while media_folder_list_items(),
media_folder_change_folder() and media_item_play() all answer EBUSY for
the very same condition.

The commit that added Search copied the error code from the argument
check sitting directly above it, rather than from ChangeFolder, which
had gained the identical busy check four days earlier and used EBUSY.

Fixes: 0a232a434d4b ("audio/player: Add implementation of MediaFolder.Search")

Assisted-by: Claude:claude-opus-5 valgrind
---
 profiles/audio/player.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/profiles/audio/player.c b/profiles/audio/player.c
index 7c5ea5b62..4c94dcab4 100644
--- a/profiles/audio/player.c
+++ b/profiles/audio/player.c
@@ -826,7 +826,7 @@ static DBusMessage *media_folder_search(DBusConnection *conn, DBusMessage *msg,
 		return btd_error_not_supported(msg);
 
 	if (mp->msg != NULL)
-		return btd_error_failed(msg, strerror(EINVAL));
+		return btd_error_failed(msg, strerror(EBUSY));
 
 	err = cb->cbs->search(mp, string, cb->user_data);
 	if (err < 0)
-- 
2.54.0 (Apple Git-157)