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 08710EB64D7 for ; Mon, 26 Jun 2023 18:43:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232537AbjFZSnN (ORCPT ); Mon, 26 Jun 2023 14:43:13 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55630 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232554AbjFZSnL (ORCPT ); Mon, 26 Jun 2023 14:43:11 -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 5529910CC for ; Mon, 26 Jun 2023 11:42:50 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id D0C6B60F53 for ; Mon, 26 Jun 2023 18:42:49 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D4C44C433C0; Mon, 26 Jun 2023 18:42:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1687804969; bh=F8FUVlnxdwh0wxecFka3joh4grL9o850eHRQc+PLDZI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=dAR8wc3l3G7elE2pvVXg5354BWLDcInCPpVHIIgQTjW/yyIjhrVhlZZJ8jRw6Ezpf XppK6DaJ3I1B+7fkjbEajgRvR46I+ZNSI+QgT8omClSz5mQ2Zi0iaCbYXA7TOxzy1w CTMaimkQsJO6mRwwsDcDLGNVsm2Np9sJqtuAfVAw= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Jiawen Wu , Andy Shevchenko , Linus Walleij , Bartosz Golaszewski , Sasha Levin Subject: [PATCH 5.15 74/96] gpiolib: Fix GPIO chip IRQ initialization restriction Date: Mon, 26 Jun 2023 20:12:29 +0200 Message-ID: <20230626180750.067541851@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230626180746.943455203@linuxfoundation.org> References: <20230626180746.943455203@linuxfoundation.org> User-Agent: quilt/0.67 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: Jiawen Wu [ Upstream commit 8c00914e5438e3636f26b4f814b3297ae2a1b9ee ] In case of gpio-regmap, IRQ chip is added by regmap-irq and associated with GPIO chip by gpiochip_irqchip_add_domain(). The initialization flag was not added in gpiochip_irqchip_add_domain(), causing gpiochip_to_irq() to return -EPROBE_DEFER. Fixes: 5467801f1fcb ("gpio: Restrict usage of GPIO chip irq members before initialization") Signed-off-by: Jiawen Wu Reviewed-by: Andy Shevchenko Reviewed-by: Linus Walleij Signed-off-by: Bartosz Golaszewski Signed-off-by: Sasha Levin --- drivers/gpio/gpiolib.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index 099fe2e39bd63..f9fdd117c654c 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -1683,6 +1683,14 @@ int gpiochip_irqchip_add_domain(struct gpio_chip *gc, gc->to_irq = gpiochip_to_irq; gc->irq.domain = domain; + /* + * Using barrier() here to prevent compiler from reordering + * gc->irq.initialized before adding irqdomain. + */ + barrier(); + + gc->irq.initialized = true; + return 0; } EXPORT_SYMBOL_GPL(gpiochip_irqchip_add_domain); -- 2.39.2