From patchwork Tue Dec 24 12:07:06 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bartosz Golaszewski X-Patchwork-Id: 1215205 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (no SPF record) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-gpio-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=bgdev.pl Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=bgdev-pl.20150623.gappssmtp.com header.i=@bgdev-pl.20150623.gappssmtp.com header.b="moslOAFz"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 47hw2x2jZVz9sR0 for ; Tue, 24 Dec 2019 23:07:53 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726214AbfLXMHs (ORCPT ); Tue, 24 Dec 2019 07:07:48 -0500 Received: from mail-wr1-f66.google.com ([209.85.221.66]:43858 "EHLO mail-wr1-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726272AbfLXMH3 (ORCPT ); Tue, 24 Dec 2019 07:07:29 -0500 Received: by mail-wr1-f66.google.com with SMTP id d16so19635602wre.10 for ; Tue, 24 Dec 2019 04:07:27 -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=tU86MMVxrse5YMWqteajnEFU35pv/6iPejb2oOl04wY=; b=moslOAFzC8vWO0kicWkt16Ro7NiZvBN2koOHrvPhnMlGotUNTc+9m+PZdN/40m/tpk oOwruzNE6pGSBV++h3rcgNGy6gejCRcVh+pgou2gf+IfvciNnQEvfcn2G08hQuvKLswp KlOhBDfAjs8KQMsHgFMU3/5Zj5/z18sg3CgXkIu3eEAlzcXhTCmR3VR2amhxpbvhaThV 2APzZEs/gyYnnqSYHl5lNVmNARQyB5N38clYOtYWIlmkeAuQ7qIra7RPd0rXyVCevhXh MtXyMq5wMCueaA2HvUk+O16ODNIVK9iZfiECml0gWw+2NA4PXgLQ8e13F41X/RACfP4y oeow== 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=tU86MMVxrse5YMWqteajnEFU35pv/6iPejb2oOl04wY=; b=Y6A67RQ7ILhJs7QcHIvDp+2mZVrug8RBqgQBxwulycpSQjzcGESoviILyT139ew027 LVkfyff/dEwGjgWP8H1D9F1vPH8LzQoAWmhb68endsMSugybePEv67Ps9AwcXkAZQS6p yVCAQEJpw0mCt88WHuAtvVrAcAC42rBsXHdWFgufB9aod4RrZe+ErvCnoqmVFELXiIXO I65PbqqiQ9+lKrNbbQAQuhwu9BU1yvUggIlhsu4XqUfCwsqB45YhqZy64me22CyTQFCJ e6OflU+kx/5EfAraEB0HsmCinhJ6AKxSogukexq/m7sDsEs8YvRL6y6h6uSKiD4hoeJJ g9SA== X-Gm-Message-State: APjAAAXu8CaC2vScFIYXxHc2Q9qeGRMuPlj55x+/jUNMZ0rhr+NJ9ZU5 mG2GIJ6y2wUdZq5AKmA0NDU2GA== X-Google-Smtp-Source: APXvYqwb050E6ngqjjLeJ7b5rz3hizZ9dwrm2UfhuhdjQyNpDFqme8cZtJdaAd6GxTQ5Ji4xRGVIDA== X-Received: by 2002:adf:f8c8:: with SMTP id f8mr33925895wrq.331.1577189247400; Tue, 24 Dec 2019 04:07:27 -0800 (PST) Received: from debian-brgl.home ([2a01:cb1d:af:5b00:6d6c:8493:1ab5:dad7]) by smtp.gmail.com with ESMTPSA id s10sm23829210wrw.12.2019.12.24.04.07.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 24 Dec 2019 04:07:26 -0800 (PST) From: Bartosz Golaszewski To: Kent Gibson , Linus Walleij , Andy Shevchenko , Greg Kroah-Hartman Cc: linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, Bartosz Golaszewski Subject: [PATCH v4 10/13] gpiolib: emit a debug message when adding events to a full kfifo Date: Tue, 24 Dec 2019 13:07:06 +0100 Message-Id: <20191224120709.18247-11-brgl@bgdev.pl> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20191224120709.18247-1-brgl@bgdev.pl> References: <20191224120709.18247-1-brgl@bgdev.pl> MIME-Version: 1.0 Sender: linux-gpio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-gpio@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 a859c0813e0d..543244355e1c 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -979,6 +979,8 @@ 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; }