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=-17.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, 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 A63F8C433E0 for ; Wed, 27 Jan 2021 17:28:23 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 3F5D164DA5 for ; Wed, 27 Jan 2021 17:28:23 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3F5D164DA5 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:MIME-Version:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:References:In-Reply-To:Message-Id:Date:Subject:To: From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=BJeE4lZkvCTpA9ILDhEqjJ0TloJz7bPyROdZKAhKymo=; b=Fq5CND4jyZxLpH7kfIthVTJyud x02EUIZcWKB0mS7BFGtFMswkHE8etS9e1Ymcb4i8gv9rajOIk7kYht/eRbW++fvqzFCPDETv6JyUJ XXqEtqPDW3kkB+sbEGjOMrQ3RJ6WQLgaW8cGThOV+MyXhOrqtTIGGwnKBw/s7zRCM/uZ94PiDRTG1 O9ek6vVkVgDcD5IvnjG9USWDI5BOg2Qs4Jv2RCRyIyO4eWpxjfCtI97Grfkp0FBlbsD9fvI2NcpMp 5RCeYv8FKcR0yNkDGynF5pjJLw2Z8LkvtmP4mtW9NJQeqO9RBCph636aRbfXWSy8BysbieabC1rU8 j7m3SKiQ==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1l4oad-0005eU-P4; Wed, 27 Jan 2021 17:26:48 +0000 Received: from foss.arm.com ([217.140.110.172]) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1l4oZs-0005PZ-Ky for linux-arm-kernel@lists.infradead.org; Wed, 27 Jan 2021 17:26:02 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 1B634139F; Wed, 27 Jan 2021 09:26:00 -0800 (PST) Received: from localhost.localdomain (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id D97053F66E; Wed, 27 Jan 2021 09:25:57 -0800 (PST) From: Andre Przywara To: Maxime Ripard , Chen-Yu Tsai Subject: [PATCH v5 05/20] Input: axp20x-pek: Bail out if AXP has no interrupt line connected Date: Wed, 27 Jan 2021 17:24:45 +0000 Message-Id: <20210127172500.13356-6-andre.przywara@arm.com> X-Mailer: git-send-email 2.14.1 In-Reply-To: <20210127172500.13356-1-andre.przywara@arm.com> References: <20210127172500.13356-1-andre.przywara@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210127_122600_878958_13ED4A9E X-CRM114-Status: GOOD ( 16.56 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Jernej Skrabec , Samuel Holland , Yangtao Li , Dmitry Torokhov , linux-kernel@vger.kernel.org, linux-sunxi@googlegroups.com, =?UTF-8?q?Cl=C3=A9ment=20P=C3=A9ron?= , linux-input@vger.kernel.org, Shuosheng Huang , Lee Jones , linux-arm-kernel@lists.infradead.org, Icenowy Zheng MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On at least one board (Orangepi Zero2) the AXP305 PMIC does not have its interrupt line connected to the CPU (mostly because the H616 SoC does not feature an NMI pin anymore). After allowing the AXP driver to proceed without an "interrupts" property [1], the axp20x-pek driver crashes with a NULL pointer dereference (see below). Check for the regmap_irqc member to be not NULL before proceeding with probe. This gets normally filled by the call to regmap_add_irq_chip(), which we allow to skip now, when the DT node lacks an interrupt property. .... [ 3.843388] sunxi-rsb 7083000.rsb: RSB running at 3000000 Hz [ 3.849972] axp20x-rsb sunxi-rsb-745: AXP20x variant AXP806 found [ 3.857971] Unable to handle kernel NULL pointer dereference at virtual address 00000000000001b8 [ 3.866855] Mem abort info: [ 3.869691] ESR = 0x96000004 [ 3.872749] EC = 0x25: DABT (current EL), IL = 32 bits [ 3.878092] SET = 0, FnV = 0 [ 3.881149] EA = 0, S1PTW = 0 [ 3.884309] Data abort info: [ 3.887210] ISV = 0, ISS = 0x00000004 [ 3.891062] CM = 0, WnR = 0 [ 3.894049] [00000000000001b8] user address but active_mm is swapper [ 3.900590] Internal error: Oops: 96000004 [#1] PREEMPT SMP [ 3.906166] Modules linked in: [ 3.909227] CPU: 2 PID: 34 Comm: kworker/2:1 Not tainted 5.11.0-rc1 [ 3.915925] Hardware name: OrangePi Zero2 (DT) [ 3.920367] Workqueue: events deferred_probe_work_func [ 3.925518] pstate: 40000005 (nZcv daif -PAN -UAO -TCO BTYPE=--) [ 3.931522] pc : regmap_irq_get_virq+0x0/0x48 [ 3.935883] lr : axp20x_pek_probe+0x78/0x200 [ 3.940147] sp : ffff800012fdb450 [ 3.943459] x29: ffff800012fdb450 x28: ffff0000054af340 [ 3.948776] x27: ffff000005534000 x26: ffff000005534810 [ 3.954091] x25: ffff800012883028 x24: 0000000000000002 [ 3.959407] x23: ffff80001157eaf0 x22: ffff000005534810 [ 3.964722] x21: ffff000005534800 x20: ffff0000054b0580 [ 3.970037] x19: 000000000000000b x18: 0000000000000000 [ 3.975353] x17: 0000000000000001 x16: 0000000000000019 [ 3.980668] x15: 000002ce4ea04ae6 x14: 000000000000014f [ 3.985983] x13: 0000000000000282 x12: 0000000000000030 [ 3.991298] x11: 0000000000000038 x10: 0101010101010101 [ 3.996613] x9 : 0000000000000000 x8 : 7f7f7f7f7f7f7f7f [ 4.001928] x7 : ff5141435e4a444f x6 : 0000000000000080 [ 4.007243] x5 : 0000000000000000 x4 : 8000000000000000 [ 4.012558] x3 : 0000000000000000 x2 : 0000000000000000 [ 4.017872] x1 : 000000000000000b x0 : 0000000000000000 [ 4.023188] Call trace: [ 4.025635] regmap_irq_get_virq+0x0/0x48 [ 4.029646] platform_probe+0x68/0xd8 [ 4.033312] really_probe+0xe4/0x3b0 [ 4.036889] driver_probe_device+0x58/0xb8 [ 4.040986] __device_attach_driver+0x84/0xc8 [ 4.045342] bus_for_each_drv+0x78/0xc8 [ 4.049178] __device_attach+0xf0/0x150 [ 4.053013] device_initial_probe+0x14/0x20 [ 4.057196] bus_probe_device+0x9c/0xa8 [ 4.061032] device_add+0x36c/0x7b8 [ 4.064525] platform_device_add+0x100/0x238 [ 4.068796] mfd_add_devices+0x494/0x718 [ 4.072721] axp20x_device_probe+0x70/0x158 [ 4.076904] axp20x_rsb_probe+0x94/0xd0 [ 4.080741] sunxi_rsb_device_probe+0x6c/0x88 [ 4.085102] really_probe+0xe4/0x3b0 [ 4.088679] driver_probe_device+0x58/0xb8 [ 4.092776] __device_attach_driver+0x84/0xc8 [ 4.097132] bus_for_each_drv+0x78/0xc8 [ 4.100967] __device_attach+0xf0/0x150 [ 4.104803] device_initial_probe+0x14/0x20 [ 4.108986] bus_probe_device+0x9c/0xa8 [ 4.112821] device_add+0x36c/0x7b8 [ 4.116313] device_register+0x20/0x30 [ 4.120065] sunxi_rsb_probe+0x4e4/0x608 .... [1] http://lists.infradead.org/pipermail/linux-arm-kernel/2021-January/633392.html Signed-off-by: Andre Przywara --- drivers/input/misc/axp20x-pek.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/input/misc/axp20x-pek.c b/drivers/input/misc/axp20x-pek.c index 9c6386b2af33..abe52ef194ee 100644 --- a/drivers/input/misc/axp20x-pek.c +++ b/drivers/input/misc/axp20x-pek.c @@ -309,6 +309,10 @@ static int axp20x_pek_probe(struct platform_device *pdev) axp20x_pek->axp20x = dev_get_drvdata(pdev->dev.parent); + /* In case there is no interrupt line from the AXP towards the CPU. */ + if (!axp20x_pek->axp20x->regmap_irqc) + return -ENODEV; + axp20x_pek->irq_dbr = platform_get_irq_byname(pdev, "PEK_DBR"); if (axp20x_pek->irq_dbr < 0) return axp20x_pek->irq_dbr; -- 2.17.5 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel