From patchwork Fri May 1 13:21:37 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 226488 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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 1692EC47253 for ; Fri, 1 May 2020 13:59:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DC7BF206D6 for ; Fri, 1 May 2020 13:59:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1588341543; bh=nOOC4/cmUf7KfBHIyGKi9ABo4BI3gmd1MGEwGx+wxJk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=z5At7WNBwMY6K2ZVNsch/BY6wmcCk+XKcGSY/II2rRmCLazYLA2Wj4LZ6QQDLjE3K ggMkcR75S+8kXc1udV/moI7tRt6frXz77xjko7ha7fLL0gXGj7LlTL8MqCUAfyw/qz +9CBj0LKle2PUOKPCmWpqMWIWoV6c1jHshmdnhfs= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729803AbgEAN3g (ORCPT ); Fri, 1 May 2020 09:29:36 -0400 Received: from mail.kernel.org ([198.145.29.99]:53182 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729778AbgEAN3g (ORCPT ); Fri, 1 May 2020 09:29:36 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 3B99720757; Fri, 1 May 2020 13:29:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1588339775; bh=nOOC4/cmUf7KfBHIyGKi9ABo4BI3gmd1MGEwGx+wxJk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=nVa9L0m7x9X0PVQA+VaryL5ZpEKIXG4I6vM5q+MkZpgPmNSIiUDJ3rjWzIdw0irEs Gg2nrocV9S7cOwyQyKUqyNFkzPEsR9FBdCtemyXXM2QJ49W4KVnTiopjv/tiVrSBrY ltPmikNViY1pkTscUyQFw5QV1s4T89KQ4DzM2iZU= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Hans de Goede , Jarkko Sakkinen Subject: [PATCH 4.9 43/80] tpm/tpm_tis: Free IRQ if probing fails Date: Fri, 1 May 2020 15:21:37 +0200 Message-Id: <20200501131527.056773144@linuxfoundation.org> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200501131513.810761598@linuxfoundation.org> References: <20200501131513.810761598@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Jarkko Sakkinen commit b160c94be5d2816b62c8ac338605668304242959 upstream. Call disable_interrupts() if we have to revert to polling in order not to unnecessarily reserve the IRQ for the life-cycle of the driver. Cc: stable@vger.kernel.org # 4.5.x Reported-by: Hans de Goede Fixes: e3837e74a06d ("tpm_tis: Refactor the interrupt setup") Signed-off-by: Jarkko Sakkinen Signed-off-by: Greg Kroah-Hartman --- drivers/char/tpm/tpm_tis_core.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) --- a/drivers/char/tpm/tpm_tis_core.c +++ b/drivers/char/tpm/tpm_tis_core.c @@ -329,6 +329,9 @@ static void disable_interrupts(struct tp u32 intmask; int rc; + if (priv->irq == 0) + return; + rc = tpm_tis_read32(priv, TPM_INT_ENABLE(priv->locality), &intmask); if (rc < 0) intmask = 0; @@ -786,9 +789,12 @@ int tpm_tis_core_init(struct device *dev if (irq) { tpm_tis_probe_irq_single(chip, intmask, IRQF_SHARED, irq); - if (!(chip->flags & TPM_CHIP_FLAG_IRQ)) + if (!(chip->flags & TPM_CHIP_FLAG_IRQ)) { dev_err(&chip->dev, FW_BUG "TPM interrupt not working, polling instead\n"); + + disable_interrupts(chip); + } } else { tpm_tis_probe_irq(chip, intmask); }