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=-8.8 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, USER_AGENT_GIT 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 1069BC31E4A for ; Fri, 14 Jun 2019 00:12:08 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id A4CF921537 for ; Fri, 14 Jun 2019 00:12:07 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=nvidia.com header.i=@nvidia.com header.b="neN3kBOM" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A4CF921537 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=nvidia.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 190D56B000C; Thu, 13 Jun 2019 20:12:07 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 141EC6B000D; Thu, 13 Jun 2019 20:12:07 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 0308B6B000E; Thu, 13 Jun 2019 20:12:06 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from mail-yw1-f71.google.com (mail-yw1-f71.google.com [209.85.161.71]) by kanga.kvack.org (Postfix) with ESMTP id D6DD16B000C for ; Thu, 13 Jun 2019 20:12:06 -0400 (EDT) Received: by mail-yw1-f71.google.com with SMTP id f69so692960ywb.21 for ; Thu, 13 Jun 2019 17:12:06 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding:dkim-signature; bh=2rNJ7DTMjMPhOlVosuT+dcn+kIR1ESSVOR99OmM6ZKM=; b=Nx2UBZ+Cr1RWmFMvLE00WdrujkXE8ewOsvLNoryKxFEJMujVOMCUS6K76ykn2HrO0a zj0DQhbLBt2YyDOFvoWeWlSxnzDHvcvG6xAQKvH6zX9k3vh/OweQReAfC1xYHTcCVvkL WUCHfWBkdWKAAqAae7eVO0NMxgAmeVDXkSHyek4EpZUZDtI8LPqyWro/eplnlyyBoTy2 Viw08028wbufWAE5a4UXR+clR8y1Yazfc0hDH0RyWpjH0K1wLSm6eIRpnNvLRu61z9bU bNI0wVYs48+Joyn83GoN/MO82PnywwH+aI+zqGEfZV+dCedWREo3DlVICuX/t+qEJKui qHuQ== X-Gm-Message-State: APjAAAXiM83dMAtPCQbdmElUnXQuZrCN9Uv3aE9KhBEMaG4xTd4CG/k4 rKEqKJIIkHcKEV95UmSdjtep+wesc3rRDyTWez3kpiYfjhYe8bBybExV+F20zf1F3Hfxk6rGIiq 3MHdVXRHxyZXAJo5iPWv3ysNk9hXr8ADV0DJgPo1Qka6BTnFLSaa0u2oJBfo5QWi1OA== X-Received: by 2002:a81:6ad4:: with SMTP id f203mr36500958ywc.196.1560471126634; Thu, 13 Jun 2019 17:12:06 -0700 (PDT) X-Google-Smtp-Source: APXvYqyjSLUb1EHFIRdKXMEGQn15wCxZzAwAAxPLyKNqkNboHMBsdlacO6bTHRdKvlv2D/G0quyJ X-Received: by 2002:a81:6ad4:: with SMTP id f203mr36500939ywc.196.1560471126083; Thu, 13 Jun 2019 17:12:06 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1560471126; cv=none; d=google.com; s=arc-20160816; b=De83H2ZbJk3AGPuikqFLciln5QFk5/mTlnMR6snhO0i/AmuwN+MeBLH0CqurDDGXBG FwQv5DM/dv02XiM6QWzaJ0+G7PvVRTJ07c0FyQBQgb21yUCbPQTq/ejMhqrV21NQ+4bV Gxi+OMkHLUF76k26GU1e/VH5MEdXMAGDLYYJLeHKaIqYZFUPZ3PxO2zNnYOaHtDoDPUo Vj0cRXF/mPaRtJ4RviDOeLNl8fByO9ES8bBWcj1aOFp2HNjZuaeH2sVJt2AJ9NiD2Rh9 qtl3oMNrSJqA4KyWWwfGq8NYlJXGDReVFEpnOzfFAE3d3y79vFMK/GIAFy03tfRdB2Eu /1Qw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=dkim-signature:content-transfer-encoding:mime-version:message-id :date:subject:cc:to:from; bh=2rNJ7DTMjMPhOlVosuT+dcn+kIR1ESSVOR99OmM6ZKM=; b=vsWuvkek2u0DyYg90RK+Fnl9+/xuaz+I1FZgOVE2Te5G9MR4TsT+YiHRAgISuedcnV T73FaqBZ8Ja7s39DFNwSW41+CfnLlpZN6YAVcqWYwkVn4DXeJpMM2hjv1pvXfPSfOvp+ XB69rRzzNr3FNy8ammVrIaRqp870RZdWr2Qx6qy9aa6i9/G0OfnpjzdhmAkNCFbRDCxe mcae5M/u63Lni9mTbJBUdx0fMTTKkp1L9TGLO+mmNfKeiAkImhoNBBpZWtvIJq2moqt+ Y2zQRo9//O4s3Jqsl7lLjq0F23lxcjrITxeRDd+sxBXArU1cAKI5o6VTBZaJ7+TXj7it CRZQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@nvidia.com header.s=n1 header.b=neN3kBOM; spf=pass (google.com: domain of rcampbell@nvidia.com designates 216.228.121.65 as permitted sender) smtp.mailfrom=rcampbell@nvidia.com; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=nvidia.com Received: from hqemgate16.nvidia.com (hqemgate16.nvidia.com. [216.228.121.65]) by mx.google.com with ESMTPS id u125si492306ywa.200.2019.06.13.17.12.05 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 13 Jun 2019 17:12:06 -0700 (PDT) Received-SPF: pass (google.com: domain of rcampbell@nvidia.com designates 216.228.121.65 as permitted sender) client-ip=216.228.121.65; Authentication-Results: mx.google.com; dkim=pass header.i=@nvidia.com header.s=n1 header.b=neN3kBOM; spf=pass (google.com: domain of rcampbell@nvidia.com designates 216.228.121.65 as permitted sender) smtp.mailfrom=rcampbell@nvidia.com; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=nvidia.com Received: from hqpgpgate102.nvidia.com (Not Verified[216.228.121.13]) by hqemgate16.nvidia.com (using TLS: TLSv1.2, DES-CBC3-SHA) id ; Thu, 13 Jun 2019 17:12:05 -0700 Received: from hqmail.nvidia.com ([172.20.161.6]) by hqpgpgate102.nvidia.com (PGP Universal service); Thu, 13 Jun 2019 17:12:05 -0700 X-PGP-Universal: processed; by hqpgpgate102.nvidia.com on Thu, 13 Jun 2019 17:12:05 -0700 Received: from HQMAIL111.nvidia.com (172.20.187.18) by HQMAIL108.nvidia.com (172.18.146.13) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Fri, 14 Jun 2019 00:12:04 +0000 Received: from HQMAIL104.nvidia.com (172.18.146.11) by HQMAIL111.nvidia.com (172.20.187.18) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Fri, 14 Jun 2019 00:12:00 +0000 Received: from hqnvemgw01.nvidia.com (172.20.150.20) by HQMAIL104.nvidia.com (172.18.146.11) with Microsoft SMTP Server (TLS) id 15.0.1473.3 via Frontend Transport; Fri, 14 Jun 2019 00:12:00 +0000 Received: from rcampbell-dev.nvidia.com (Not Verified[10.110.48.66]) by hqnvemgw01.nvidia.com with Trustwave SEG (v7,5,8,10121) id ; Thu, 13 Jun 2019 17:11:59 -0700 From: Ralph Campbell To: Jerome Glisse , David Airlie , "Ben Skeggs" , Jason Gunthorpe CC: , , , , "Ralph Campbell" Subject: [PATCH] drm/nouveau/dmem: missing mutex_lock in error path Date: Thu, 13 Jun 2019 17:11:21 -0700 Message-ID: <20190614001121.23950-1-rcampbell@nvidia.com> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 X-NVConfidentiality: public Content-Transfer-Encoding: quoted-printable Content-Type: text/plain DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1; t=1560471125; bh=2rNJ7DTMjMPhOlVosuT+dcn+kIR1ESSVOR99OmM6ZKM=; h=X-PGP-Universal:From:To:CC:Subject:Date:Message-ID:X-Mailer: MIME-Version:X-NVConfidentiality:Content-Transfer-Encoding: Content-Type; b=neN3kBOM4fwFzxxjmxWL1ltp+tFO8bAcbqFK/NkF6ljwaGDjCyCUNjyfFcYeKG9T4 5LdGR7QCJzezPlMCmrdKYb1uNBS/iIAEnpK1hMJVC4YlXEsNnr9L2qFHaYil+aBIyJ 60wMyDHM5XN/zwZxTsCkESQujXLaoeWvhG5kKgnBZubuDk3cxpKMsqfWLQComwBkgO y8MOe90H/Rqb7zeWBsQG5hqIu9N7CqlNp/FIgtnz3xiNXN0ispWt/+exKroPpJ9wCJ Pz57q/vucsb+GtG/qX1XENQ8dZu+F/CYr0G+CV/G3g2ekKciae45Ha0N3zk6j+9N+U gbTCIFIddddug== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: In nouveau_dmem_pages_alloc(), the drm->dmem->mutex is unlocked before calling nouveau_dmem_chunk_alloc(). Reacquire the lock before continuing to the next page. Signed-off-by: Ralph Campbell --- I found this while testing Jason Gunthorpe's hmm tree but this is independant of those changes. I guess it could go through David Airlie's tree for nouveau or Jason's tree. drivers/gpu/drm/nouveau/nouveau_dmem.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/nouveau/nouveau_dmem.c b/drivers/gpu/drm/nouve= au/nouveau_dmem.c index 27aa4e72abe9..00f7236af1b9 100644 --- a/drivers/gpu/drm/nouveau/nouveau_dmem.c +++ b/drivers/gpu/drm/nouveau/nouveau_dmem.c @@ -379,9 +379,10 @@ nouveau_dmem_pages_alloc(struct nouveau_drm *drm, ret =3D nouveau_dmem_chunk_alloc(drm); if (ret) { if (c) - break; + return 0; return ret; } + mutex_lock(&drm->dmem->mutex); continue; } =20 --=20 2.20.1