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=-12.8 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,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 09F15C433E1 for ; Fri, 21 Aug 2020 16:16:25 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id D161820FC3 for ; Fri, 21 Aug 2020 16:16:24 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="nMHUqRKJ" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D161820FC3 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=amd-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 172DA6EB2E; Fri, 21 Aug 2020 16:16:20 +0000 (UTC) Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by gabe.freedesktop.org (Postfix) with ESMTPS id D49126EB2E; Fri, 21 Aug 2020 16:16:18 +0000 (UTC) Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id DD2B12224D; Fri, 21 Aug 2020 16:16:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598026578; bh=aeNLfbOxc1fi4O4pUGXUtGAphJ/8yx6rS/qKYDWhY34=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=nMHUqRKJvojsv7bdiGwB1NXBKoc6OWu8CDYXvGpe0D3hcp3ypC7sKar5lCuORgQVZ khOXQgUEfN6yvnavTK4JKugsEjzLm9XuX2/ihiPjMuDSaC67XdY01UDmJvVFO7Bd0P NxjF05cj9O8nsOZ5B3WVb2tXTo/f5jB63maiGvQQ= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Subject: [PATCH AUTOSEL 5.7 27/61] drm/amdgpu/fence: fix ref count leak when pm_runtime_get_sync fails Date: Fri, 21 Aug 2020 12:15:11 -0400 Message-Id: <20200821161545.347622-27-sashal@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200821161545.347622-1-sashal@kernel.org> References: <20200821161545.347622-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-BeenThere: amd-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Discussion list for AMD gfx List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Sasha Levin , Felix Kuehling , Rajneesh Bhardwaj , dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org, Alex Deucher Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: amd-gfx-bounces@lists.freedesktop.org Sender: "amd-gfx" 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 892c1e9a1eb04..bf82b25e1aa32 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c @@ -746,8 +746,10 @@ 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); -- 2.25.1 _______________________________________________ amd-gfx mailing list amd-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/amd-gfx