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 2540EC433E0 for ; Wed, 27 May 2020 06:26:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EF5E520787 for ; Wed, 27 May 2020 06:26:46 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="VCMH9aJZ" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728500AbgE0G0q (ORCPT ); Wed, 27 May 2020 02:26:46 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54252 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728003AbgE0G0p (ORCPT ); Wed, 27 May 2020 02:26:45 -0400 Received: from mail-pf1-x441.google.com (mail-pf1-x441.google.com [IPv6:2607:f8b0:4864:20::441]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 96FA3C061A0F for ; Tue, 26 May 2020 23:26:45 -0700 (PDT) Received: by mail-pf1-x441.google.com with SMTP id e11so10437229pfn.3 for ; Tue, 26 May 2020 23:26:45 -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=5F8AuAdD6vIH5WTUv671XyQbSMrH4wURkSBRo5DqQ6I=; b=VCMH9aJZEMUKwdWpD907O6d8TMaPjL4JJT4vpgHMwChl2TQh+0cIkUtMSXgS2ZH6aN bvMDRnH156mxfIHNj/zo6p7qGmmMeqaaUhEVvaFikc4qGaCK1koc7PLRxw5tNNHdY2Mb jtIwF/7tRuPFWH5QwPRZ7KyTU+s9nBN9h2e0GSy3ObZyqPkqHNmMHICCJQ42Jlcj9xLI 8lgYj2RjFBgVwqk7nyzvyNNZb8S8eNqrKSf52wkkVDL0c+AlKll1IyK77BFOPAYYWyTC YgMZz2JkmOl42xHfxOV7PDWHf9Elfa3KofSAP08d2xpMV9jDgUlNFwAn4bjEc3bcOEhO cFsw== 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=5F8AuAdD6vIH5WTUv671XyQbSMrH4wURkSBRo5DqQ6I=; b=LfJ0X/VGMVrRrBmEaw26j9tf9U3D0OTZbYJpWJZXzPSrgsoERxlmon3Ir+GDaPbve4 wihcsbv0oL4im1GO5l+J8E+3XyyiWsLdGavSQqncSe3fwN5N9/xzieUQLjxjQ6S2+rQE NOokeJfWKP2YyWpi3gBfAux9oDtz7U1JaOEsr+pkZQ62TYWlqobr2tMIDsygJ/f/Hnsb ts6csNj7PyRK9FR0FExW0DcMeKYAFsqAn3kToGAsJfNysHRIjj6M2RdoNutY10cOZKTZ CFCmHY/kWUQ1ZUvSWcD2L60DVLiLqOFQSJuw+kUgLVC2TN1RJUxRFGxZN2Lcwj2EE9PQ EjUA== X-Gm-Message-State: AOAM531M3XbZSEPH8eoABuNum7IzoH3qFooEZSWUX/p4K7+v32SlEdBv VDD8EZDEvMUKhU/5CpYhPbPHsg== X-Google-Smtp-Source: ABdhPJyeT+KxjyC94j5N+rfQfDyWTDiqqHSfAO3JO/MYUToUrCmwpPVeBGCcFCYe1rG45lq2kx/2Tw== X-Received: by 2002:a63:689:: with SMTP id 131mr2278235pgg.401.1590560805099; Tue, 26 May 2020 23:26:45 -0700 (PDT) Received: from localhost.localdomain ([117.252.68.136]) by smtp.gmail.com with ESMTPSA id m12sm1239121pjs.41.2020.05.26.23.26.40 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Tue, 26 May 2020 23:26:44 -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, linux-kernel@vger.kernel.org, Sumit Garg Subject: [PATCH v3 2/4] kdb: Check status of console prior to invoking handlers Date: Wed, 27 May 2020 11:55:57 +0530 Message-Id: <1590560759-21453-3-git-send-email-sumit.garg@linaro.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1590560759-21453-1-git-send-email-sumit.garg@linaro.org> References: <1590560759-21453-1-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 --- 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