[PATCH v6 2/4] kdb: Check status of console prior to invoking handlers

[Sumit Garg <sumit.garg@linaro.org>]

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

Suggested-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Signed-off-by: Sumit Garg <sumit.garg@linaro.org>
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Revieved-by: Petr Mladek <pmladek@suse.com>
---
 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 2d42a02..58b7d25 100644
--- a/kernel/debug/kdb/kdb_io.c
+++ b/kernel/debug/kdb/kdb_io.c
@@ -560,6 +560,8 @@ static void kdb_msg_write(const char *msg, int msg_len)
 	}
 
 	for_each_console(c) {
+		if (!(c->flags & CON_ENABLED))
+			continue;
 		c->write(c, msg, msg_len);
 		touch_nmi_watchdog();
 	}
-- 
2.7.4