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 X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham 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 D9745C43603 for ; Wed, 11 Dec 2019 23:19:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id AF095214AF for ; Wed, 11 Dec 2019 23:19:07 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="QLGm3S2d" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727077AbfLKXTG (ORCPT ); Wed, 11 Dec 2019 18:19:06 -0500 Received: from us-smtp-delivery-1.mimecast.com ([207.211.31.120]:50131 "EHLO us-smtp-1.mimecast.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726589AbfLKXTF (ORCPT ); Wed, 11 Dec 2019 18:19:05 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1576106344; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=7dJcxVu7RPHrA9N3SIaEzHtFnUyKVlhYarW5FtIpICo=; b=QLGm3S2d/zGO8enXkDQ9au3D2Jr54v9o6xpBb6zsqL11Cp3rHEN+zvbuo9iExnQf7CSPAA vpvMtVlvEPKMRAK+7SKJybwClh+WZ2FMGP1Z9BfIba77lRNBAuLL3PUcGDVJOmk8jE5txU 1GE/KI3MpJl9MRpuv5pY6EkIkZrovus= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-391-q9ROnZ_cNXOGc3XKgyn4yA-1; Wed, 11 Dec 2019 18:19:01 -0500 X-MC-Unique: q9ROnZ_cNXOGc3XKgyn4yA-1 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id DEF6318B5FA1; Wed, 11 Dec 2019 23:18:59 +0000 (UTC) Received: from cantor.redhat.com (ovpn-116-36.phx2.redhat.com [10.3.116.36]) by smtp.corp.redhat.com (Postfix) with ESMTP id DE09E1891F; Wed, 11 Dec 2019 23:18:23 +0000 (UTC) From: Jerry Snitselaar To: linux-kernel@vger.kernel.org Cc: Christian Bundy , Dan Williams , Peter Huewe , Jarkko Sakkinen , Jason Gunthorpe , Stefan Berger , stable@vger.kernel.org, linux-intergrity@vger.kernel.org Subject: [PATCH] tpm_tis: reserve chip for duration of tpm_tis_core_init Date: Wed, 11 Dec 2019 16:17:58 -0700 Message-Id: <20191211231758.22263-1-jsnitsel@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 Content-Transfer-Encoding: quoted-printable Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Instead of repeatedly calling tpm_chip_start/tpm_chip_stop when issuing commands to the tpm during initialization, just reserve the chip after wait_startup, and release it when we are ready to call tpm_chip_register. Cc: Christian Bundy Cc: Dan Williams Cc: Peter Huewe Cc: Jarkko Sakkinen Cc: Jason Gunthorpe Cc: Stefan Berger Cc: stable@vger.kernel.org Cc: linux-intergrity@vger.kernel.org Fixes: a3fbfae82b4c ("tpm: take TPM chip power gating out of tpm_transmit= ()") Signed-off-by: Jerry Snitselaar --- drivers/char/tpm/tpm_tis_core.c | 17 +++++++---------- 1 file changed, 7 insertions(+), 10 deletions(-) diff --git a/drivers/char/tpm/tpm_tis_core.c b/drivers/char/tpm/tpm_tis_c= ore.c index 8af2cee1a762..308756d278b3 100644 --- a/drivers/char/tpm/tpm_tis_core.c +++ b/drivers/char/tpm/tpm_tis_core.c @@ -978,13 +978,13 @@ int tpm_tis_core_init(struct device *dev, struct tp= m_tis_data *priv, int irq, =20 if (wait_startup(chip, 0) !=3D 0) { rc =3D -ENODEV; - goto out_err; + goto out_start; } =20 /* Take control of the TPM's interrupt hardware and shut it off */ rc =3D tpm_tis_read32(priv, TPM_INT_ENABLE(priv->locality), &intmask); if (rc < 0) - goto out_err; + goto out_start; =20 intmask |=3D TPM_INTF_CMD_READY_INT | TPM_INTF_LOCALITY_CHANGE_INT | TPM_INTF_DATA_AVAIL_INT | TPM_INTF_STS_VALID_INT; @@ -993,9 +993,8 @@ int tpm_tis_core_init(struct device *dev, struct tpm_= tis_data *priv, int irq, =20 rc =3D tpm_chip_start(chip); if (rc) - goto out_err; + goto out_start; rc =3D tpm2_probe(chip); - tpm_chip_stop(chip); if (rc) goto out_err; =20 @@ -1059,7 +1058,6 @@ int tpm_tis_core_init(struct device *dev, struct tp= m_tis_data *priv, int irq, goto out_err; } =20 - tpm_chip_start(chip); chip->flags |=3D TPM_CHIP_FLAG_IRQ; if (irq) { tpm_tis_probe_irq_single(chip, intmask, IRQF_SHARED, @@ -1070,18 +1068,17 @@ int tpm_tis_core_init(struct device *dev, struct = tpm_tis_data *priv, int irq, } else { tpm_tis_probe_irq(chip, intmask); } - tpm_chip_stop(chip); } + tpm_chip_stop(chip); =20 rc =3D tpm_chip_register(chip); if (rc) - goto out_err; - - if (chip->ops->clk_enable !=3D NULL) - chip->ops->clk_enable(chip, false); + goto out_start; =20 return 0; out_err: + tpm_chip_stop(chip); +out_start: if ((chip->ops !=3D NULL) && (chip->ops->clk_enable !=3D NULL)) chip->ops->clk_enable(chip, false); =20 --=20 2.24.0