1 files changed, 2 insertions, 0 deletions

diff --git a/kernel/debug/debug_core.c b/kernel/debug/debug_core.c
index 6e1fa829fde..1d71df66f3f 100644
--- a/kernel/debug/debug_core.c
+++ b/kernel/debug/debug_core.c
@@ -882,6 +882,8 @@ EXPORT_SYMBOL_GPL(kgdb_unregister_io_module);
 int dbg_io_get_char(void)
 {
         int ret = dbg_io_ops->read_char();
+        if (ret == NO_POLL_CHAR)
+                return -1;
         if (!dbg_kdb_mode)
                 return ret;
         if (ret == 127)