From patchwork Tue Sep 1 15:08:06 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: 264620 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=unavailable 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 CB08AC433E2 for ; Tue, 1 Sep 2020 16:12:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9185D204EC for ; Tue, 1 Sep 2020 16:12:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598976741; bh=I6GAMxGs19nNEZFk2dtb6Q6gWKmT1Q9GK98PIdZDL8M=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=fG/fP5ot3Ktqzuw4gSvvR9sBrUaXtyZ6GxshA+TArmilUFR9aHcPwrAZRUCsEZvwx RVLzu+aKmWlOQLk5cUrXj+TRjl0l8M3le4lNIld5LNW/750eqX+U4MK6BcrZ9sCz5c ObwpNdkV4vDIGHVOH99L24SPO6aZcnt50pL5rwB8= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731161AbgIAPhC (ORCPT ); Tue, 1 Sep 2020 11:37:02 -0400 Received: from mail.kernel.org ([198.145.29.99]:44492 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731122AbgIAPg5 (ORCPT ); Tue, 1 Sep 2020 11:36:57 -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 23AE021534; Tue, 1 Sep 2020 15:36:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598974616; bh=I6GAMxGs19nNEZFk2dtb6Q6gWKmT1Q9GK98PIdZDL8M=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=zowdB2H2eB4whGqAIqgjq0kSUTCJ9ODZq5lxC8Ao8B8qjeKZVWDkwwwaq7/rQcJQB kdpayqCjv7MQbLfW7EJ1y8zonS4T/Wm04qn3qG4g5OU/g/knILvV8GgXuegQlquFK4 K0iYPvWqj/HgjdXRkxHBhrgp6edxQPmOc+ZiAC+w= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Rajneesh Bhardwaj , Alex Deucher , Sasha Levin Subject: [PATCH 5.8 030/255] drm/amdkfd: fix ref count leak when pm_runtime_get_sync fails Date: Tue, 1 Sep 2020 17:08:06 +0200 Message-Id: <20200901151002.218616843@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 1c1ada37af6ee6fb9cfc8da6a56cc83208cd8d6f ] 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: Rajneesh Bhardwaj Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin --- drivers/gpu/drm/amd/amdkfd/kfd_process.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_process.c b/drivers/gpu/drm/amd/amdkfd/kfd_process.c index 0e0c42e9f6a31..6520a920cad4a 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_process.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_process.c @@ -1003,8 +1003,10 @@ struct kfd_process_device *kfd_bind_process_to_device(struct kfd_dev *dev, */ if (!pdd->runtime_inuse) { err = pm_runtime_get_sync(dev->ddev->dev); - if (err < 0) + if (err < 0) { + pm_runtime_put_autosuspend(dev->ddev->dev); return ERR_PTR(err); + } } err = kfd_iommu_bind_process_to_device(pdd);