From nobody Wed Dec 17 09:12:20 2025 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 9F2AAC38A2D for ; Mon, 24 Oct 2022 14:12:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232878AbiJXOMQ (ORCPT ); Mon, 24 Oct 2022 10:12:16 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47018 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235429AbiJXOJM (ORCPT ); Mon, 24 Oct 2022 10:09:12 -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 2430AC5100; Mon, 24 Oct 2022 05:51:23 -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 E6BE661290; Mon, 24 Oct 2022 12:49:29 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 039B3C433C1; Mon, 24 Oct 2022 12:49:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1666615769; bh=b2T9RUet62fU3Ztf9GawhjllprseIO+DUXDl6aQp68Y=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=tpn2EMnOxI5ouoamlE1ezIKotiL/uL1WYRej028XQSeutA5CmyOytVmk3BZaU/euM dboETEO3OVq52TMJjfJg3kW+WPkHY7oP7wxl+8oCWotZgVI/GLnqkYzgohWTUdZf+i nHl5GSEMyF0ruk4xpJolPLFOXE1I29ahs4OXoMCI= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Kshitiz Varshney , Herbert Xu , Sasha Levin Subject: [PATCH 5.15 377/530] hwrng: imx-rngc - Moving IRQ handler registering after imx_rngc_irq_mask_clear() Date: Mon, 24 Oct 2022 13:32:01 +0200 Message-Id: <20221024113102.098719716@linuxfoundation.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221024113044.976326639@linuxfoundation.org> References: <20221024113044.976326639@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Kshitiz Varshney [ Upstream commit 10a2199caf437e893d9027d97700b3c6010048b7 ] Issue: While servicing interrupt, if the IRQ happens to be because of a SEED_DONE due to a previous boot stage, you end up completing the completion prematurely, hence causing kernel to crash while booting. Fix: Moving IRQ handler registering after imx_rngc_irq_mask_clear() Fixes: 1d5449445bd0 (hwrng: mx-rngc - add a driver for Freescale RNGC) Signed-off-by: Kshitiz Varshney Signed-off-by: Herbert Xu Signed-off-by: Sasha Levin --- drivers/char/hw_random/imx-rngc.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) --- a/drivers/char/hw_random/imx-rngc.c +++ b/drivers/char/hw_random/imx-rngc.c @@ -270,13 +270,6 @@ static int imx_rngc_probe(struct platfor goto err; } =20 - ret =3D devm_request_irq(&pdev->dev, - irq, imx_rngc_irq, 0, pdev->name, (void *)rngc); - if (ret) { - dev_err(rngc->dev, "Can't get interrupt working.\n"); - goto err; - } - init_completion(&rngc->rng_op_done); =20 rngc->rng.name =3D pdev->name; @@ -290,6 +283,13 @@ static int imx_rngc_probe(struct platfor =20 imx_rngc_irq_mask_clear(rngc); =20 + ret =3D devm_request_irq(&pdev->dev, + irq, imx_rngc_irq, 0, pdev->name, (void *)rngc); + if (ret) { + dev_err(rngc->dev, "Can't get interrupt working.\n"); + return ret; + } + if (self_test) { ret =3D imx_rngc_self_test(rngc); if (ret) {