From patchwork Tue Sep 1 15:08:05 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 310362 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=-13.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, 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 9C138C433E2 for ; Tue, 1 Sep 2020 16:12:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6EE71204EC for ; Tue, 1 Sep 2020 16:12:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598976759; bh=M+Bk+/4lU9mMcnvrN2jpBXG1aWpPW0uTtcT+LKxuSn4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=H3eHfH5ZFKB+Sau5fVCCecKFY2EcvmPlp7Q5+Saa7HzS7wpNE/ftSP2RM9jHLpOnd T7QtsnO15/4Evb9TWPHxAPVZ+egNod/SDB7/4IM2Sx5PK44XYi5V7qTegWKLdsipZU 9PHn2jFfvYOZNH71OgdZaznZKy1awVyvfaJT+pQw= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731235AbgIAQMh (ORCPT ); Tue, 1 Sep 2020 12:12:37 -0400 Received: from mail.kernel.org ([198.145.29.99]:44374 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728671AbgIAPgy (ORCPT ); Tue, 1 Sep 2020 11:36:54 -0400 Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) (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 B5AA220E65; Tue, 1 Sep 2020 15:36:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598974614; bh=M+Bk+/4lU9mMcnvrN2jpBXG1aWpPW0uTtcT+LKxuSn4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=JXR/qp2+RJitLnmQfwrP/2N12Q4/DahSddvAt/mt0ntAMg4cIfFDTdeEXw9rq0nLp PMCmSBy2QFwEdZdC7TSFYVbEDJk2X1OjHeB7xce+vpvVgL+vlrY9kg1t68xbEheJci mCtqUp0FL7DmqJDXhXkgA+z6/bp1UIHBlKXLxmQE= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Felix Kuehling , Rajneesh Bhardwaj , Alex Deucher , Sasha Levin Subject: [PATCH 5.8 029/255] drm/amdgpu/fence: fix ref count leak when pm_runtime_get_sync fails Date: Tue, 1 Sep 2020 17:08:05 +0200 Message-Id: <20200901151002.170202815@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200901151000.800754757@linuxfoundation.org> References: <20200901151000.800754757@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: Alex Deucher [ Upstream commit e520d3e0d2818aafcdf9d8b60916754d8fedc366 ] The call to pm_runtime_get_sync increments the counter even in case of failure, leading to incorrect ref count. In case of failure, decrement the ref count before returning. Reviewed-by: Felix Kuehling Acked-by: Rajneesh Bhardwaj Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin --- drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c index 3414e119f0cbf..f5a6ee7c2eaa3 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c @@ -754,8 +754,10 @@ static int amdgpu_debugfs_gpu_recover(struct seq_file *m, void *data) int r; r = pm_runtime_get_sync(dev->dev); - if (r < 0) + if (r < 0) { + pm_runtime_put_autosuspend(dev->dev); return 0; + } seq_printf(m, "gpu recover\n"); amdgpu_device_gpu_recover(adev, NULL);