From patchwork Tue Jul 26 20:47:12 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eric Anholt X-Patchwork-Id: 9248927 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 93ACD607D8 for ; Tue, 26 Jul 2016 20:47:39 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 84A9926222 for ; Tue, 26 Jul 2016 20:47:39 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 7943D26B41; Tue, 26 Jul 2016 20:47:39 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1272826222 for ; Tue, 26 Jul 2016 20:47:39 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 7990F6E00E; Tue, 26 Jul 2016 20:47:21 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from anholt.net (anholt.net [50.246.234.109]) by gabe.freedesktop.org (Postfix) with ESMTP id CD88D6E328 for ; Tue, 26 Jul 2016 20:47:17 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by anholt.net (Postfix) with ESMTP id A32C92C9C06E; Tue, 26 Jul 2016 13:47:17 -0700 (PDT) X-Virus-Scanned: Debian amavisd-new at anholt.net Received: from anholt.net ([127.0.0.1]) by localhost (kingsolver.anholt.net [127.0.0.1]) (amavisd-new, port 10024) with LMTP id dChU3RnhiF05; Tue, 26 Jul 2016 13:47:17 -0700 (PDT) Received: from eliezer.anholt.net (localhost [127.0.0.1]) by anholt.net (Postfix) with ESMTP id 12F9B2C9C06F; Tue, 26 Jul 2016 13:47:16 -0700 (PDT) Received: by eliezer.anholt.net (Postfix, from userid 1000) id B3CBFF007D6; Tue, 26 Jul 2016 13:47:15 -0700 (PDT) From: Eric Anholt To: dri-devel@lists.freedesktop.org Subject: [PATCH 3/6] drm/vc4: Fix handling of a pm_runtime_get_sync() success case. Date: Tue, 26 Jul 2016 13:47:12 -0700 Message-Id: <1469566035-22006-4-git-send-email-eric@anholt.net> X-Mailer: git-send-email 2.8.1 In-Reply-To: <1469566035-22006-1-git-send-email-eric@anholt.net> References: <1469566035-22006-1-git-send-email-eric@anholt.net> Cc: linux-kernel@vger.kernel.org X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP If the device was already up, a 1 is returned instead of 0. We were erroring out, leading the 3D driver to sometimes fail at screen initialization (generally with ENOENT returned to it). Signed-off-by: Eric Anholt Fixes: af713795c59f ("drm/vc4: Add a getparam ioctl for getting the V3D identity regs.") --- drivers/gpu/drm/vc4/vc4_drv.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/vc4/vc4_drv.c b/drivers/gpu/drm/vc4/vc4_drv.c index 9435894822d5..fb20e03ec7e2 100644 --- a/drivers/gpu/drm/vc4/vc4_drv.c +++ b/drivers/gpu/drm/vc4/vc4_drv.c @@ -57,21 +57,21 @@ static int vc4_get_param_ioctl(struct drm_device *dev, void *data, switch (args->param) { case DRM_VC4_PARAM_V3D_IDENT0: ret = pm_runtime_get_sync(&vc4->v3d->pdev->dev); - if (ret) + if (ret < 0) return ret; args->value = V3D_READ(V3D_IDENT0); pm_runtime_put(&vc4->v3d->pdev->dev); break; case DRM_VC4_PARAM_V3D_IDENT1: ret = pm_runtime_get_sync(&vc4->v3d->pdev->dev); - if (ret) + if (ret < 0) return ret; args->value = V3D_READ(V3D_IDENT1); pm_runtime_put(&vc4->v3d->pdev->dev); break; case DRM_VC4_PARAM_V3D_IDENT2: ret = pm_runtime_get_sync(&vc4->v3d->pdev->dev); - if (ret) + if (ret < 0) return ret; args->value = V3D_READ(V3D_IDENT2); pm_runtime_put(&vc4->v3d->pdev->dev);