From patchwork Fri Dec 18 14:31:00 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Enrico Weigelt, metux IT consult" X-Patchwork-Id: 11982211 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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 0711EC3526D for ; Fri, 18 Dec 2020 14:37:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CAC4823AAA for ; Fri, 18 Dec 2020 14:37:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728058AbgLROfP (ORCPT ); Fri, 18 Dec 2020 09:35:15 -0500 Received: from mout.kundenserver.de ([212.227.126.130]:44739 "EHLO mout.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727894AbgLROfN (ORCPT ); Fri, 18 Dec 2020 09:35:13 -0500 Received: from orion.localdomain ([95.115.54.243]) by mrelayeu.kundenserver.de (mreue009 [212.227.15.167]) with ESMTPSA (Nemesis) id 1MNKuI-1kSfN03xpi-00OoTh; Fri, 18 Dec 2020 15:31:41 +0100 From: "Enrico Weigelt, metux IT consult" To: linux-kernel@vger.kernel.org Cc: mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@redhat.com, namhyung@kernel.org, catalin.marinas@arm.com, will@kernel.org, msalter@redhat.com, jacquiot.aurelien@gmail.com, gerg@linux-m68k.org, geert@linux-m68k.org, tsbogend@alpha.franken.de, James.Bottomley@HansenPartnership.com, deller@gmx.de, benh@kernel.crashing.org, paulus@samba.org, ysato@users.sourceforge.jp, dalias@libc.org, davem@davemloft.net, tglx@linutronix.de, bp@alien8.de, x86@kernel.org, hpa@zytor.com, linus.walleij@linaro.org, bgolaszewski@baylibre.com, maz@kernel.org, tony@atomide.com, arnd@arndb.de, linux-alpha@vger.kernel.org, linux-c6x-dev@linux-c6x.org, linux-ia64@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-gpio@vger.kernel.org, linux-omap@vger.kernel.org, linux-arch@vger.kernel.org Subject: [PATCH 01/23] kernel: irq: irqdescs: warn on spurious IRQ Date: Fri, 18 Dec 2020 15:31:00 +0100 Message-Id: <20201218143122.19459-2-info@metux.net> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20201218143122.19459-1-info@metux.net> References: <20201218143122.19459-1-info@metux.net> X-Provags-ID: V03:K1:LV+vlieoH9S7FVeRD54ZyNGq0lXxd7A7eeGG73dV5SKsuNXUfZI t5Tc1dALRs2AtPOwYKoApPnoyxW7/Lxyitn6jmEk7odPc1fXKRQf1B17b0Xo7GSaZpMx5dW TGMTjUj10cvONDT+2jdjeydrLJOMscAH46e6N0Uv313zK0Un9DMFeG3NocxtaL9uYHwBWUE aSQQOOS63nbzmSA0OZCyw== X-UI-Out-Filterresults: notjunk:1;V03:K0:+jizveWrAag=:xi1E+afKqBPbuitFr74tH/ Pqa93R1CfB6VGpKCdCeA3imHCGUzmR1wu1gjA3PGPF+dMp9C4DR3rt99LswhF1TegW/RnTDot 7d+qHzUK0gNbP/ybW7PGmodvcbOApL7/3hR0HaBIPYze29okX0qVKNaN0uUOc0aMPNrJm/lHf rCFjulnbgKj9sYd2ill1azgaxbVSkzVmRlEPbAXZ+0ALMS8qEDGet+OtJmWpacsNa46vQXnQR mVE6jRttoXsNQa2wg7diSy8ElyG3YIRCwJEWAPOcEpIC4aPBtfkksUoly5a7/5EKCc4EvuICg YHQlmrQSz8cwd325SSQ2jSl5oaE8TxRVgzjar1+yw/FjC2rs1pHYfkD4L/u2NKSTYhAEHWZqD //Tdu1h6FpFg7G/m1MYCJBESvLEx03W/xk08EHJHT4hVa+Y58QzG42CuKoHzR Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.org Add a warning on spurious IRQs to __handle_domain_irq(), also telling the linux IRQ number (if any), the hw IRQ number and the max nr of IRQs. That's far more informative than the warnings in (some of) the individual arch's ack_bad_irq()'s. These aren't really helpful since either the other callers already had printed more detailed information or (when called by __handle_domain_irq()) the printout just doesn't tell anything useful. Signed-off-by: Enrico Weigelt, metux IT consult --- kernel/irq/irqdesc.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c index e810eb9906ea..62a381351775 100644 --- a/kernel/irq/irqdesc.c +++ b/kernel/irq/irqdesc.c @@ -681,6 +681,9 @@ int __handle_domain_irq(struct irq_domain *domain, unsigned int hwirq, * than crashing, do something sensible. */ if (unlikely(!irq || irq >= nr_irqs)) { + if (printk_ratelimit()) + pr_warn("spurious IRQ: irq=%d hwirq=%d nr_irqs=%d\n", + irq, hwirq, nr_irqs); ack_bad_irq(irq); ret = -EINVAL; } else {