[PATCH v5 2/4] kdb: Check status of console prior to invoking handlers

From: Sumit Garg <sumit.garg@linaro.org>
To: daniel.thompson@linaro.org
Cc: kgdb-bugreport@lists.sourceforge.net, jason.wessel@windriver.com,
	dianders@chromium.org, pmladek@suse.com,
	sergey.senozhatsky@gmail.com, gregkh@linuxfoundation.org,
	jslaby@suse.com, linux-kernel@vger.kernel.org,
	Sumit Garg <sumit.garg@linaro.org>
Subject: [PATCH v5 2/4] kdb: Check status of console prior to invoking handlers
Date: Wed,  3 Jun 2020 12:52:13 +0530	[thread overview]
Message-ID: <1591168935-6382-3-git-send-email-sumit.garg@linaro.org> (raw)
In-Reply-To: <1591168935-6382-1-git-send-email-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>
---
 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

