Check if a console is enabled prior to invoking corresponding write
handler.

Suggested-by: Sergey Senozhatsky <sergey.senozhat...@gmail.com>
Signed-off-by: Sumit Garg <sumit.g...@linaro.org>
---
 kernel/debug/kdb/kdb_io.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/kernel/debug/kdb/kdb_io.c b/kernel/debug/kdb/kdb_io.c
index f6b4d47..349dfcc 100644
--- a/kernel/debug/kdb/kdb_io.c
+++ b/kernel/debug/kdb/kdb_io.c
@@ -564,6 +564,8 @@ static void kdb_msg_write(char *msg, int msg_len)
                kdb_io_write(msg, msg_len, dbg_io_ops->write_char);
 
        for_each_console(c) {
+               if (!(c->flags & CON_ENABLED))
+                       continue;
                c->write(c, msg, msg_len);
                touch_nmi_watchdog();
        }
-- 
2.7.4



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