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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id BFCCCC04A68 for ; Wed, 27 Jul 2022 17:03:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241356AbiG0RDs (ORCPT ); Wed, 27 Jul 2022 13:03:48 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55622 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237635AbiG0RD0 (ORCPT ); Wed, 27 Jul 2022 13:03:26 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4001C6D9CF; Wed, 27 Jul 2022 09:38:41 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 933F9601C0; Wed, 27 Jul 2022 16:38:40 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9EAB1C433C1; Wed, 27 Jul 2022 16:38:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1658939920; bh=MwyX3wjA57F6sEfsuEZsMG8VT9p23XwcnOQyULZiTZk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=JA8psd9P70iAI/vRwFBI2J7CJ12J9ffDgu26C+qTf2WDNQYmXOFQkN6YSAcLPiyY4 FkVYTFeVBgg/emVV3WbqCWDCwcGFPNS0dZzqwXmXRoUMcWM8LqsYVbJ1mSieKNFcmB bwIhOokTh63j3vIh1gn8K6n7fREJwLujh+BDKqlg= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Fabien Dessenne , Linus Walleij Subject: [PATCH 5.15 001/201] pinctrl: stm32: fix optional IRQ support to gpios Date: Wed, 27 Jul 2022 18:08:25 +0200 Message-Id: <20220727161027.029748200@linuxfoundation.org> X-Mailer: git-send-email 2.37.1 In-Reply-To: <20220727161026.977588183@linuxfoundation.org> References: <20220727161026.977588183@linuxfoundation.org> User-Agent: quilt/0.66 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Fabien Dessenne commit a1d4ef1adf8bbd302067534ead671a94759687ed upstream. To act as an interrupt controller, a gpio bank relies on the "interrupt-parent" of the pin controller. When this optional "interrupt-parent" misses, do not create any IRQ domain. This fixes a "NULL pointer in stm32_gpio_domain_alloc()" kernel crash when the interrupt-parent = property is not declared in the Device Tree. Fixes: 0eb9f683336d ("pinctrl: Add IRQ support to STM32 gpios") Signed-off-by: Fabien Dessenne Link: https://lore.kernel.org/r/20220627142350.742973-1-fabien.dessenne@foss.st.com Signed-off-by: Linus Walleij Signed-off-by: Greg Kroah-Hartman --- drivers/pinctrl/stm32/pinctrl-stm32.c | 20 ++++++++++++-------- 1 file changed, 12 insertions(+), 8 deletions(-) --- a/drivers/pinctrl/stm32/pinctrl-stm32.c +++ b/drivers/pinctrl/stm32/pinctrl-stm32.c @@ -1299,15 +1299,17 @@ static int stm32_gpiolib_register_bank(s bank->bank_ioport_nr = bank_ioport_nr; spin_lock_init(&bank->lock); - /* create irq hierarchical domain */ - bank->fwnode = of_node_to_fwnode(np); + if (pctl->domain) { + /* create irq hierarchical domain */ + bank->fwnode = of_node_to_fwnode(np); + + bank->domain = irq_domain_create_hierarchy(pctl->domain, 0, STM32_GPIO_IRQ_LINE, + bank->fwnode, &stm32_gpio_domain_ops, + bank); - bank->domain = irq_domain_create_hierarchy(pctl->domain, 0, - STM32_GPIO_IRQ_LINE, bank->fwnode, - &stm32_gpio_domain_ops, bank); - - if (!bank->domain) - return -ENODEV; + if (!bank->domain) + return -ENODEV; + } err = gpiochip_add_data(&bank->gpio_chip, bank); if (err) { @@ -1477,6 +1479,8 @@ int stm32_pctl_probe(struct platform_dev pctl->domain = stm32_pctrl_get_irq_domain(np); if (IS_ERR(pctl->domain)) return PTR_ERR(pctl->domain); + if (!pctl->domain) + dev_warn(dev, "pinctrl without interrupt support\n"); /* hwspinlock is optional */ hwlock_id = of_hwspin_lock_get_id(pdev->dev.of_node, 0);