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, 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 27DBBC32771 for ; Fri, 24 Jan 2020 17:27:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 003FC20838 for ; Fri, 24 Jan 2020 17:27:36 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=bgdev-pl.20150623.gappssmtp.com header.i=@bgdev-pl.20150623.gappssmtp.com header.b="V4XH+jQZ" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390614AbgAXR1g (ORCPT ); Fri, 24 Jan 2020 12:27:36 -0500 Received: from mail-wr1-f68.google.com ([209.85.221.68]:33822 "EHLO mail-wr1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390567AbgAXR1e (ORCPT ); Fri, 24 Jan 2020 12:27:34 -0500 Received: by mail-wr1-f68.google.com with SMTP id t2so2952469wrr.1 for ; Fri, 24 Jan 2020 09:27:32 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bgdev-pl.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=9tqJ8hKTow0T/VgL6aumMqy4dOXfLxsRaXXpIm/xvCo=; b=V4XH+jQZzL3PvFu3wJZuk/g9eIJ+Vptk7cYflTShliBZfW8vZXb7gBYTF/TjY1zpT3 dFKQQ+h+e7SL2w5L5jE2eXRuYnX9WMBcwGISSsNoX+vnYQ1kUiPktuUR+BAtS/CNO0vC mJJh7CKtM5zfKJ8PmCp45TVJBVDxRSB9WsxsiNF9qeAAUMKfBLnEi0C0gCTb3vr8n9/a YWhU/ARyrS0eNFGkSSQQVagSmas9GLllv5bRbzlWIsx6jfXFJVMY32JsFxZFHj96Ooh+ vdJLNd/J88KhX/xDpXLD12ByyjC6J0dXLjHjBzEz+9YGIcitFIvUztCxFXD1G/Doq88Y +8YQ== 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:mime-version:content-transfer-encoding; bh=9tqJ8hKTow0T/VgL6aumMqy4dOXfLxsRaXXpIm/xvCo=; b=p6C6Hl75FWcDsvyCyul5OToFQptjtDPwIxIlVHYpSrq7/aLgGSP5dsO5HNgmRT/v5M 5swGgZg4TUIvCfUWb0bDaKJRb3p4KQD9Z17A9rElJ/7yxIgQtjywdztu+1CyoXVzsq7H WxAp0SMc0gDOwvM3kga18m9ht8puI6C7qdKfXCIL+dFH77/S7U47gdJijeG8vxbZpMnC UvsabXiLH3WvdLzkySWr96qMaHZBwqPRaWDHMJgCaSsbptcPfdqMValo7XyJeaIwfrqY DV2uX2K8U++AZNiWW05TQiPBwD4buUu7ZPOfQPDTW4rvNs61DSY9ibm6O7cI+I8eZWpV mXsQ== X-Gm-Message-State: APjAAAVCN9Ak2xAjN/40qD7Pr0M4bdtUDLz71xN/qjzWM2vt5WthAj9r KdaZ7QfmAk1prj7cVBQseoIfHw== X-Google-Smtp-Source: APXvYqwDicetKOsRSolDyzcTai9wz8IIiJRWhiY9UOc0DDJaEy3wTnK+25XS/RJhILTVIlRhTK7V/Q== X-Received: by 2002:adf:dfd2:: with SMTP id q18mr5816993wrn.152.1579886840707; Fri, 24 Jan 2020 09:27:20 -0800 (PST) Received: from debian-brgl.home ([2a01:cb1d:af:5b00:6d6c:8493:1ab5:dad7]) by smtp.gmail.com with ESMTPSA id t8sm8358585wrp.69.2020.01.24.09.27.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 24 Jan 2020 09:27:20 -0800 (PST) From: Bartosz Golaszewski To: Kent Gibson , Linus Walleij , Andy Shevchenko Cc: linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, Bartosz Golaszewski Subject: [PATCH v6 4/7] gpiolib: emit a debug message when adding events to a full kfifo Date: Fri, 24 Jan 2020 18:27:07 +0100 Message-Id: <20200124172710.20776-5-brgl@bgdev.pl> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20200124172710.20776-1-brgl@bgdev.pl> References: <20200124172710.20776-1-brgl@bgdev.pl> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Bartosz Golaszewski Currently if the line-event kfifo is full, we just silently drop any new events. Add a ratelimited debug message so that we at least have some trace in the kernel log of event overflow. Signed-off-by: Bartosz Golaszewski --- drivers/gpio/gpiolib.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index 66df06a24cfd..4ce34958e335 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -978,6 +978,8 @@ static irqreturn_t lineevent_irq_thread(int irq, void *p) 1, &le->wait.lock); if (ret) wake_up_poll(&le->wait, EPOLLIN); + else + pr_debug_ratelimited("event FIFO is full - event dropped\n"); return IRQ_HANDLED; } -- 2.23.0