From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sasha Levin Subject: [PATCH AUTOSEL 4.19 083/258] drm: Move drm_mode_setcrtc() local re-init to failure path Date: Mon, 28 Jan 2019 10:56:29 -0500 Message-ID: <20190128155924.51521-83-sashal@kernel.org> References: <20190128155924.51521-1-sashal@kernel.org> Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Return-path: In-Reply-To: <20190128155924.51521-1-sashal@kernel.org> Sender: linux-kernel-owner@vger.kernel.org To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Sean Paul , Sasha Levin , dri-devel@lists.freedesktop.org List-Id: dri-devel@lists.freedesktop.org From: Sean Paul [ Upstream commit c232e9f41b136c141df9938024e521191a7b910d ] Instead of always re-initializing the variables we need to clean up on out, move the re-initialization into the branch that goes back to retry label. This is a lateral move right now, but will allow us to pull out the modeset locking into common code. I kept this change separate to make things easier to review. Changes in v2: - None Reviewed-by: Daniel Vetter Signed-off-by: Sean Paul Link: https://patchwork.freedesktop.org/patch/msgid/20181129150423.239081-2-sean@poorly.run Signed-off-by: Sasha Levin --- drivers/gpu/drm/drm_crtc.c | 16 +++++++++------- 1 file changed, 9 insertions(+), 7 deletions(-) diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c index 9cbe8f5c9aca..ed9d7fc4cb2c 100644 --- a/drivers/gpu/drm/drm_crtc.c +++ b/drivers/gpu/drm/drm_crtc.c @@ -567,9 +567,9 @@ int drm_mode_setcrtc(struct drm_device *dev, void *data, struct drm_mode_crtc *crtc_req = data; struct drm_crtc *crtc; struct drm_plane *plane; - struct drm_connector **connector_set, *connector; - struct drm_framebuffer *fb; - struct drm_display_mode *mode; + struct drm_connector **connector_set = NULL, *connector; + struct drm_framebuffer *fb = NULL; + struct drm_display_mode *mode = NULL; struct drm_mode_set set; uint32_t __user *set_connectors_ptr; struct drm_modeset_acquire_ctx ctx; @@ -598,10 +598,6 @@ int drm_mode_setcrtc(struct drm_device *dev, void *data, mutex_lock(&crtc->dev->mode_config.mutex); drm_modeset_acquire_init(&ctx, DRM_MODESET_ACQUIRE_INTERRUPTIBLE); retry: - connector_set = NULL; - fb = NULL; - mode = NULL; - ret = drm_modeset_lock_all_ctx(crtc->dev, &ctx); if (ret) goto out; @@ -763,6 +759,12 @@ int drm_mode_setcrtc(struct drm_device *dev, void *data, } kfree(connector_set); drm_mode_destroy(dev, mode); + + /* In case we need to retry... */ + connector_set = NULL; + fb = NULL; + mode = NULL; + if (ret == -EDEADLK) { ret = drm_modeset_backoff(&ctx); if (!ret) -- 2.19.1