From patchwork Tue Jan 21 18:37:48 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stephen Boyd X-Patchwork-Id: 207361 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=-9.9 required=3.0 tests=DKIMWL_WL_HIGH, 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 33184C33CAA for ; Tue, 21 Jan 2020 18:37:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 07E4824125 for ; Tue, 21 Jan 2020 18:37:51 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="iruQMEZf" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729134AbgAUShu (ORCPT ); Tue, 21 Jan 2020 13:37:50 -0500 Received: from mail-pj1-f68.google.com ([209.85.216.68]:50435 "EHLO mail-pj1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729096AbgAUShu (ORCPT ); Tue, 21 Jan 2020 13:37:50 -0500 Received: by mail-pj1-f68.google.com with SMTP id r67so1787627pjb.0 for ; Tue, 21 Jan 2020 10:37:50 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=d/edO9aJPoxq9g8rnEO2HYdRuntyLYALCbAy7vUg4MQ=; b=iruQMEZf6Rqj00alf/sWYoU7wkexznSITdkZFHLCdtwuvZyqJZN14M2f00bK3OG/jZ TcGu+AZd3rNmcwoRjdcZjDJTr28RaE320khkTPwfgEi1dDHYLiqpmSLT+uTwphGwUhiS OuIDqJlRtbswf+u4oyh5BPcmzke1DWQiWHxeo= 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:mime-version :content-transfer-encoding; bh=d/edO9aJPoxq9g8rnEO2HYdRuntyLYALCbAy7vUg4MQ=; b=pKbDUQHO+wof2qzPadYIZNuuwPFuv0mVp0u+cqirpCto7yCqLaol4YLmLhRzjoz8+x yZEsLaBmR44E1n9+640Hh1P8EacQ3iIQxPd6prQGunXSU4orflnRsbo8TFFHZBk1bmkJ cxkZ277wbLXxXQ0894uM6aTcbYobrPIiDTfuNGZcjMSNzjMwVUgf23m6f8Isbmqa4OzI nqLkgCwbsol+oOsf0W5yWDvulaCMpiaTy1gEr/ybcn/lCkhEu3InNwKgpP5QpAO0kfen VmoLcLF7Tk60MqIRQehiHH2CkzOAqAxwcQFoZYKiSY9JU3KRuOv0Dsj8VsQsu8GpIXF7 J5FQ== X-Gm-Message-State: APjAAAX0+ab+TjR4HidmmtL9bpSQgubK2i3x4Q5zxr6aB4GbuWNkLhWP kofm+5EMT60znUVdnF8dKAHWBj4Dq5KrLg== X-Google-Smtp-Source: APXvYqxUpWf2jqEZGnl6npXNAnSrYtJCmXM6P+Qy21YZI5vfC7PE4b+UpLRr+pn4bVOqnayAn8+svg== X-Received: by 2002:a17:90b:142:: with SMTP id em2mr7014885pjb.4.1579631869791; Tue, 21 Jan 2020 10:37:49 -0800 (PST) Received: from smtp.gmail.com ([2620:15c:202:1:fa53:7765:582b:82b9]) by smtp.gmail.com with ESMTPSA id i23sm43182250pfo.11.2020.01.21.10.37.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 21 Jan 2020 10:37:49 -0800 (PST) From: Stephen Boyd To: Linus Walleij Cc: linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-gpio@vger.kernel.org, Douglas Anderson , Brian Masney , Lina Iyer , Maulik Shah , Bjorn Andersson Subject: [PATCH] spmi: pmic-arb: Set lockdep class for hierarchical irq domains Date: Tue, 21 Jan 2020 10:37:48 -0800 Message-Id: <20200121183748.68662-1-swboyd@chromium.org> X-Mailer: git-send-email 2.25.0.341.g760bfbb309-goog MIME-Version: 1.0 Sender: linux-gpio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org I see the following lockdep splat in the qcom pinctrl driver when attempting to suspend the device. WARNING: possible recursive locking detected 5.4.11 #3 Tainted: G W -------------------------------------------- cat/3074 is trying to acquire lock: ffffff81f49804c0 (&irq_desc_lock_class){-.-.}, at: __irq_get_desc_lock+0x64/0x94 but task is already holding lock: ffffff81f1cc10c0 (&irq_desc_lock_class){-.-.}, at: __irq_get_desc_lock+0x64/0x94 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&irq_desc_lock_class); lock(&irq_desc_lock_class); *** DEADLOCK *** May be due to missing lock nesting notation 6 locks held by cat/3074: #0: ffffff81f01d9420 (sb_writers#7){.+.+}, at: vfs_write+0xd0/0x1a4 #1: ffffff81bd7d2080 (&of->mutex){+.+.}, at: kernfs_fop_write+0x12c/0x1fc #2: ffffff81f4c322f0 (kn->count#337){.+.+}, at: kernfs_fop_write+0x134/0x1fc #3: ffffffe411a41d60 (system_transition_mutex){+.+.}, at: pm_suspend+0x108/0x348 #4: ffffff81f1c5e970 (&dev->mutex){....}, at: __device_suspend+0x168/0x41c #5: ffffff81f1cc10c0 (&irq_desc_lock_class){-.-.}, at: __irq_get_desc_lock+0x64/0x94 stack backtrace: CPU: 5 PID: 3074 Comm: cat Tainted: G W 5.4.11 #3 Hardware name: Google Cheza (rev3+) (DT) Call trace: dump_backtrace+0x0/0x174 show_stack+0x20/0x2c dump_stack+0xc8/0x124 __lock_acquire+0x460/0x2388 lock_acquire+0x1cc/0x210 _raw_spin_lock_irqsave+0x64/0x80 __irq_get_desc_lock+0x64/0x94 irq_set_irq_wake+0x40/0x144 qpnpint_irq_set_wake+0x28/0x34 set_irq_wake_real+0x40/0x5c irq_set_irq_wake+0x70/0x144 pm8941_pwrkey_suspend+0x34/0x44 platform_pm_suspend+0x34/0x60 dpm_run_callback+0x64/0xcc __device_suspend+0x310/0x41c dpm_suspend+0xf8/0x298 dpm_suspend_start+0x84/0xb4 suspend_devices_and_enter+0xbc/0x620 pm_suspend+0x210/0x348 state_store+0xb0/0x108 kobj_attr_store+0x14/0x24 sysfs_kf_write+0x4c/0x64 kernfs_fop_write+0x15c/0x1fc __vfs_write+0x54/0x18c vfs_write+0xe4/0x1a4 ksys_write+0x7c/0xe4 __arm64_sys_write+0x20/0x2c el0_svc_common+0xa8/0x160 el0_svc_handler+0x7c/0x98 el0_svc+0x8/0xc Set a lockdep class when we map the irq so that irq_set_wake() doesn't warn about a lockdep bug that doesn't exist. Fixes: 12a9eeaebba3 ("spmi: pmic-arb: convert to v2 irq interfaces to support hierarchical IRQ chips") Cc: Douglas Anderson Cc: Brian Masney Cc: Lina Iyer Cc: Maulik Shah Cc: Bjorn Andersson Signed-off-by: Stephen Boyd --- drivers/spmi/spmi-pmic-arb.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/spmi/spmi-pmic-arb.c b/drivers/spmi/spmi-pmic-arb.c index 97acc2ba2912..de844b412110 100644 --- a/drivers/spmi/spmi-pmic-arb.c +++ b/drivers/spmi/spmi-pmic-arb.c @@ -731,6 +731,7 @@ static int qpnpint_irq_domain_translate(struct irq_domain *d, return 0; } +static struct lock_class_key qpnpint_irq_lock_class, qpnpint_irq_request_class; static void qpnpint_irq_domain_map(struct spmi_pmic_arb *pmic_arb, struct irq_domain *domain, unsigned int virq, @@ -746,6 +747,9 @@ static void qpnpint_irq_domain_map(struct spmi_pmic_arb *pmic_arb, else handler = handle_level_irq; + + irq_set_lockdep_class(virq, &qpnpint_irq_lock_class, + &qpnpint_irq_request_class); irq_domain_set_info(domain, virq, hwirq, &pmic_arb_irqchip, pmic_arb, handler, NULL, NULL); }