From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9669EC433E0 for ; Fri, 29 May 2020 11:27:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6D5932074D for ; Fri, 29 May 2020 11:27:32 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="j6aJEOLx" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726616AbgE2L1b (ORCPT ); Fri, 29 May 2020 07:27:31 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40404 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725306AbgE2L1a (ORCPT ); Fri, 29 May 2020 07:27:30 -0400 Received: from mail-pg1-x541.google.com (mail-pg1-x541.google.com [IPv6:2607:f8b0:4864:20::541]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4E843C03E969 for ; Fri, 29 May 2020 04:27:30 -0700 (PDT) Received: by mail-pg1-x541.google.com with SMTP id 124so1366700pgi.9 for ; Fri, 29 May 2020 04:27:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=8dgP79jKEPP7MXwHzZbUN9d9FldjpP7lv+/aoMCM0w8=; b=j6aJEOLx37LQfqAoeR/X9q4rItRoAeT0fPUkFBEX7Hli6YASNxJ8UHQFbMxl+5JYtG STQKCElCBMXh1RsorGJgqG3IOtnuRuuqPOuHaOg+julJFcPP0vTUgTAWQzoC4LpbmzPj n0Z7SLDnUTt8r80X8g/FSdnAWUpqoZdNTXR5yFHpo/Rb4Vhtksy2d6cNIZ+7C+WQmu9Z RLHpqIALYyyhRCZucQUFAkduwGAzyoJ2A707AizR2b54at5vFaRsG6aD26yj4Bd9QICO mYaXY8HseNlE5NMYYYnNvxb1MOkgvvSGxLwUN683D5cvNwCVzF6c1OA2QgP6WzS0Dyyl 8F7Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=8dgP79jKEPP7MXwHzZbUN9d9FldjpP7lv+/aoMCM0w8=; b=W/7XKo6sJ15GhXJm6Vb/P+XDSpz8UXPJYjqXzAL4Ih+Jt04FU51MH4ptIfXzCmYhFR 2iTg5bxGwQOrv5w0mMT4gqJqZCDn6xMj/RyRzQ/Q6nj1o7op3aXWjECJtVnqjlZfPIVa SN2JrPng3kIxlFQK6/V3H64zZ9EW+eU6GD85qT6xaKYORsosCxvOFk97NdwLV2Ox33Yw TDR6cTPrdYJuDmF6ivc+613cwkQsIjHWRIoYlyqCcehO93YUJD9RSs1HH/9paaeYSpZ7 LT9pmfVCCIBhtmpLjATbQBAmWPHvryQsqsppfgBezJ7bvtfxjrmNAuRQbtlw59wN2wi6 2fYg== X-Gm-Message-State: AOAM531KvMfUgwQ/OYvAXS7oTi4Nm2jWi3dcK0Nit/2xU6scDG41OUsU q46X1n9+dIXW52rggFIuofhb+Q== X-Google-Smtp-Source: ABdhPJyvF+SNj9X0aE2+/RwtRzMTeO8LTpn+2cGSVbSgb/wP+z5c/ho0ttS4850+4J4iLj6vCdF/Xg== X-Received: by 2002:a62:e913:: with SMTP id j19mr8462277pfh.78.1590751649824; Fri, 29 May 2020 04:27:29 -0700 (PDT) Received: from localhost.localdomain ([117.252.66.248]) by smtp.gmail.com with ESMTPSA id w190sm7016741pfw.35.2020.05.29.04.27.24 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Fri, 29 May 2020 04:27:28 -0700 (PDT) From: Sumit Garg 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 Subject: [PATCH v4 2/4] kdb: Check status of console prior to invoking handlers Date: Fri, 29 May 2020 16:56:45 +0530 Message-Id: <1590751607-29676-3-git-send-email-sumit.garg@linaro.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1590751607-29676-1-git-send-email-sumit.garg@linaro.org> References: <1590751607-29676-1-git-send-email-sumit.garg@linaro.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Check if a console is enabled prior to invoking corresponding write handler. Suggested-by: Sergey Senozhatsky Signed-off-by: Sumit Garg Reviewed-by: Daniel Thompson --- 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 e46f33e..fad38eb 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); for_each_console(c) { + if (!(c->flags & CON_ENABLED)) + continue; c->write(c, msg, msg_len); touch_nmi_watchdog(); } -- 2.7.4