From patchwork Fri Jan 24 17:27:07 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bartosz Golaszewski X-Patchwork-Id: 1228968 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.a=rsa-sha256 header.s=20150623 header.b=V4XH+jQZ; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 4845gb4rH6z9sPn for ; Sat, 25 Jan 2020 04:27:39 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390498AbgAXR1f (ORCPT ); Fri, 24 Jan 2020 12:27:35 -0500 Received: from mail-wr1-f67.google.com ([209.85.221.67]:35776 "EHLO mail-wr1-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390492AbgAXR1e (ORCPT ); Fri, 24 Jan 2020 12:27:34 -0500 Received: by mail-wr1-f67.google.com with SMTP id g17so2941288wro.2 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=hzl2nUMnjMkq9MKccq4zlMO7dV9llH5HKOQBV9H/Fy2z+jwrW+wLWWT5q/RxGNXemx 9kvnHM32U+VYR8ZO6991EhW+uj7/Uw3eQ6DXDKvOm6Kb/0f4ZWEfYszioLw9CDLKZ44i pZFWgRnJQj4BKXW8ww80N1zvrag9B6HEWignKlJtEXKej9vySHWcz8uhRMJXQJQbuea5 26+9+h93erT2y1sebdj8zpZfqffyx3eED1fUB5onU/tmNzwKIKHNUls1lVBdSidFOT0w Oe3fW+ThA+W8s5NeoK3kY2kjh0BMXIRef+mnYthneBKKyvxFt8vOjGxqT8lP2QTb2wFz KN4g== X-Gm-Message-State: APjAAAXVvv16GfgsY6w0nsMMg+cpmEcmvkdPGVK5RDm5Ocm0t8qgE7kK 7zrup90917dZkgJ7BTc/cZJMSw== 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 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 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; }