From patchwork Thu Nov 5 16:19:12 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Martin Wilck X-Patchwork-Id: 7562691 Return-Path: X-Original-To: patchwork-tpmdd-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 095529F71A for ; Thu, 5 Nov 2015 16:19:55 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 917F620811 for ; Thu, 5 Nov 2015 16:19:49 +0000 (UTC) Received: from lists.sourceforge.net (lists.sourceforge.net [216.34.181.88]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 9B934205EB for ; Thu, 5 Nov 2015 16:19:48 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=sfs-ml-1.v29.ch3.sourceforge.com) by sfs-ml-1.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1ZuNGO-00052S-39; Thu, 05 Nov 2015 16:19:48 +0000 Received: from sog-mx-1.v43.ch3.sourceforge.com ([172.29.43.191] helo=mx.sourceforge.net) by sfs-ml-1.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1ZuNGM-00052F-3X for tpmdd-devel@lists.sourceforge.net; Thu, 05 Nov 2015 16:19:46 +0000 Received-SPF: pass (sog-mx-1.v43.ch3.sourceforge.com: domain of ts.fujitsu.com designates 80.70.172.51 as permitted sender) client-ip=80.70.172.51; envelope-from=martin.wilck@ts.fujitsu.com; helo=dgate20.ts.fujitsu.com; Received: from dgate20.ts.fujitsu.com ([80.70.172.51]) by sog-mx-1.v43.ch3.sourceforge.com with esmtps (TLSv1:AES256-SHA:256) (Exim 4.76) id 1ZuNGL-0005g3-1L for tpmdd-devel@lists.sourceforge.net; Thu, 05 Nov 2015 16:19:46 +0000 X-SBRSScore: None Received: from unknown (HELO abgdate50u.abg.fsc.net) ([172.25.138.66]) by dgate20u.abg.fsc.net with ESMTP; 05 Nov 2015 17:19:29 +0100 Received: from unknown (HELO pdbcooper.pdb.fsc.net) ([172.25.111.126]) by abgdate50u.abg.fsc.net with ESMTP; 05 Nov 2015 17:19:29 +0100 Received: from pdbcooper.pdb.fsc.net (localhost [127.0.0.1]) by pdbcooper.pdb.fsc.net (8.14.9/8.14.8) with ESMTP id tA5GJNFl015280; Thu, 5 Nov 2015 17:19:24 +0100 From: martin.wilck@ts.fujitsu.com To: tpmdd-devel@lists.sourceforge.net Date: Thu, 5 Nov 2015 17:19:12 +0100 Message-Id: <1446740353-15235-6-git-send-email-martin.wilck@ts.fujitsu.com> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1446740353-15235-1-git-send-email-martin.wilck@ts.fujitsu.com> References: <1446740353-15235-1-git-send-email-martin.wilck@ts.fujitsu.com> X-Spam-Score: -1.6 (-) X-Headers-End: 1ZuNGL-0005g3-1L Cc: Martin Wilck Subject: [tpmdd-devel] [PATCH 5/6] tpm_tis: don't use IRQF_SHARED by default when probing IRQ X-BeenThere: tpmdd-devel@lists.sourceforge.net X-Mailman-Version: 2.1.9 Precedence: list List-Id: Tpm Device Driver maintainance List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: tpmdd-devel-bounces@lists.sourceforge.net X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, HK_RANDOM_ENVFROM, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Martin Wilck When probing IRQs, IRQF_SHARED may cause IRQs to be falsely detected if other devices generate IRQ events while tpm_tis is probing or testing. I have seen this on my test machine repeatedly. Therefore, refrain from probing IRQs that are already used by other devices by default. Use "interrupts=2" module parameter to obtain the previous behavior. Signed-off-by: Martin Wilck --- drivers/char/tpm/tpm_tis.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c index f5d7d52..21bd00a 100644 --- a/drivers/char/tpm/tpm_tis.c +++ b/drivers/char/tpm/tpm_tis.c @@ -622,9 +622,9 @@ static irqreturn_t tis_int_handler(int dummy, void *dev_id) return IRQ_HANDLED; } -static bool interrupts = true; -module_param(interrupts, bool, 0444); -MODULE_PARM_DESC(interrupts, "Enable interrupts"); +static int interrupts = 1; +module_param(interrupts, int, 0444); +MODULE_PARM_DESC(interrupts, "1 - enable interrupts (default), 0 - disable interrupts, 2 - use shared interrupts when probing"); static void tpm_tis_remove(struct tpm_chip *chip) { @@ -788,7 +788,8 @@ static int tpm_tis_init(struct device *dev, struct tpm_info *tpm_info, iowrite8(i, chip->vendor.iobase + TPM_INT_VECTOR(chip->vendor.locality)); if (devm_request_irq - (dev, i, tis_int_probe, IRQF_SHARED, + (dev, i, tis_int_probe, + interrupts == 2 ? IRQF_SHARED : 0, chip->devname, chip) != 0) { dev_info(chip->pdev, "Unable to request irq: %d for probe\n",