1 files changed, 7 insertions, 0 deletions

diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
index 5b5a7080e2a5..b4e8500afdb3 100644
--- a/kernel/printk/printk.c
+++ b/kernel/printk/printk.c
@@ -2226,6 +2226,13 @@ void register_console(struct console *newcon)
         struct console *bcon = NULL;
         struct console_cmdline *c;
 
+        if (console_drivers)
+                for_each_console(bcon)
+                        if (WARN(bcon == newcon,
+                                        "console '%s%d' already registered\n",
+                                        bcon->name, bcon->index))
+                                return;
+
         /*
          * before we register a new CON_BOOT console, make sure we don't
          * already have a valid console