Hi Gurchetan, I love your patch! Perhaps something to improve:
[auto build test WARNING on drm-intel/for-linux-next] [also build test WARNING on drm-tip/drm-tip linus/master next-20200814] [cannot apply to tegra-drm/drm/tegra/for-next drm/drm-next drm-exynos/exynos-drm-next v5.8] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Gurchetan-Singh/Blob-prerequisites-blob-resources/20200814-104250 base: git://anongit.freedesktop.org/drm-intel for-linux-next config: i386-randconfig-m021-20200816 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <l...@intel.com> smatch warnings: drivers/gpu/drm/virtio/virtgpu_kms.c:227 virtio_gpu_init() error: uninitialized symbol 'ret'. # https://github.com/0day-ci/linux/commit/ded3d7b8bb13eb8599f8d410f184521214e13328 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Gurchetan-Singh/Blob-prerequisites-blob-resources/20200814-104250 git checkout ded3d7b8bb13eb8599f8d410f184521214e13328 vim +/ret +227 drivers/gpu/drm/virtio/virtgpu_kms.c 62fb7a5e10962a Gerd Hoffmann 2014-10-28 94 d516e75c71c985 Ezequiel Garcia 2019-01-08 95 int virtio_gpu_init(struct drm_device *dev) dc5698e80cf724 Dave Airlie 2013-09-09 96 { dc5698e80cf724 Dave Airlie 2013-09-09 97 static vq_callback_t *callbacks[] = { dc5698e80cf724 Dave Airlie 2013-09-09 98 virtio_gpu_ctrl_ack, virtio_gpu_cursor_ack dc5698e80cf724 Dave Airlie 2013-09-09 99 }; f7ad26ff952b3c Stefan Hajnoczi 2015-12-17 100 static const char * const names[] = { "control", "cursor" }; dc5698e80cf724 Dave Airlie 2013-09-09 101 dc5698e80cf724 Dave Airlie 2013-09-09 102 struct virtio_gpu_device *vgdev; dc5698e80cf724 Dave Airlie 2013-09-09 103 /* this will expand later */ dc5698e80cf724 Dave Airlie 2013-09-09 104 struct virtqueue *vqs[2]; 62fb7a5e10962a Gerd Hoffmann 2014-10-28 105 u32 num_scanouts, num_capsets; dc5698e80cf724 Dave Airlie 2013-09-09 106 int ret; dc5698e80cf724 Dave Airlie 2013-09-09 107 18e51064c42ca3 Daniel Vetter 2017-05-24 108 if (!virtio_has_feature(dev_to_virtio(dev->dev), VIRTIO_F_VERSION_1)) dc5698e80cf724 Dave Airlie 2013-09-09 109 return -ENODEV; dc5698e80cf724 Dave Airlie 2013-09-09 110 dc5698e80cf724 Dave Airlie 2013-09-09 111 vgdev = kzalloc(sizeof(struct virtio_gpu_device), GFP_KERNEL); dc5698e80cf724 Dave Airlie 2013-09-09 112 if (!vgdev) dc5698e80cf724 Dave Airlie 2013-09-09 113 return -ENOMEM; dc5698e80cf724 Dave Airlie 2013-09-09 114 dc5698e80cf724 Dave Airlie 2013-09-09 115 vgdev->ddev = dev; dc5698e80cf724 Dave Airlie 2013-09-09 116 dev->dev_private = vgdev; 18e51064c42ca3 Daniel Vetter 2017-05-24 117 vgdev->vdev = dev_to_virtio(dev->dev); dc5698e80cf724 Dave Airlie 2013-09-09 118 vgdev->dev = dev->dev; dc5698e80cf724 Dave Airlie 2013-09-09 119 dc5698e80cf724 Dave Airlie 2013-09-09 120 spin_lock_init(&vgdev->display_info_lock); f6e6d9eff0b4e9 David Stevens 2020-08-13 121 spin_lock_init(&vgdev->resource_export_lock); 1938d1ae32fefa Matthew Wilcox 2018-09-26 122 ida_init(&vgdev->ctx_id_ida); 1938d1ae32fefa Matthew Wilcox 2018-09-26 123 ida_init(&vgdev->resource_ida); dc5698e80cf724 Dave Airlie 2013-09-09 124 init_waitqueue_head(&vgdev->resp_wq); dc5698e80cf724 Dave Airlie 2013-09-09 125 virtio_gpu_init_vq(&vgdev->ctrlq, virtio_gpu_dequeue_ctrl_func); dc5698e80cf724 Dave Airlie 2013-09-09 126 virtio_gpu_init_vq(&vgdev->cursorq, virtio_gpu_dequeue_cursor_func); dc5698e80cf724 Dave Airlie 2013-09-09 127 f54d1867005c33 Chris Wilson 2016-10-25 128 vgdev->fence_drv.context = dma_fence_context_alloc(1); dc5698e80cf724 Dave Airlie 2013-09-09 129 spin_lock_init(&vgdev->fence_drv.lock); dc5698e80cf724 Dave Airlie 2013-09-09 130 INIT_LIST_HEAD(&vgdev->fence_drv.fences); 62fb7a5e10962a Gerd Hoffmann 2014-10-28 131 INIT_LIST_HEAD(&vgdev->cap_cache); dc5698e80cf724 Dave Airlie 2013-09-09 132 INIT_WORK(&vgdev->config_changed_work, dc5698e80cf724 Dave Airlie 2013-09-09 133 virtio_gpu_config_changed_work_func); dc5698e80cf724 Dave Airlie 2013-09-09 134 f0c6cef7e7174b Gerd Hoffmann 2019-08-30 135 INIT_WORK(&vgdev->obj_free_work, f0c6cef7e7174b Gerd Hoffmann 2019-08-30 136 virtio_gpu_array_put_free_work); f0c6cef7e7174b Gerd Hoffmann 2019-08-30 137 INIT_LIST_HEAD(&vgdev->obj_free_list); f0c6cef7e7174b Gerd Hoffmann 2019-08-30 138 spin_lock_init(&vgdev->obj_free_lock); f0c6cef7e7174b Gerd Hoffmann 2019-08-30 139 ff2ac58a45914c Laurent Vivier 2017-01-24 140 #ifdef __LITTLE_ENDIAN 62fb7a5e10962a Gerd Hoffmann 2014-10-28 141 if (virtio_has_feature(vgdev->vdev, VIRTIO_GPU_F_VIRGL)) 62fb7a5e10962a Gerd Hoffmann 2014-10-28 142 vgdev->has_virgl_3d = true; ff2ac58a45914c Laurent Vivier 2017-01-24 143 #endif b4b01b4995fb15 Gerd Hoffmann 2018-10-30 144 if (virtio_has_feature(vgdev->vdev, VIRTIO_GPU_F_EDID)) { b4b01b4995fb15 Gerd Hoffmann 2018-10-30 145 vgdev->has_edid = true; b4b01b4995fb15 Gerd Hoffmann 2018-10-30 146 } 5edbb56082567d Gerd Hoffmann 2020-02-07 147 if (virtio_has_feature(vgdev->vdev, VIRTIO_RING_F_INDIRECT_DESC)) { 5edbb56082567d Gerd Hoffmann 2020-02-07 148 vgdev->has_indirect = true; 5edbb56082567d Gerd Hoffmann 2020-02-07 149 } f6e6d9eff0b4e9 David Stevens 2020-08-13 150 if (virtio_has_feature(vgdev->vdev, VIRTIO_GPU_F_RESOURCE_UUID)) { f6e6d9eff0b4e9 David Stevens 2020-08-13 151 vgdev->has_resource_assign_uuid = true; f6e6d9eff0b4e9 David Stevens 2020-08-13 152 } bfb6d04f29ac99 Gerd Hoffmann 2020-08-13 153 if (virtio_has_feature(vgdev->vdev, VIRTIO_GPU_F_RESOURCE_BLOB)) { bfb6d04f29ac99 Gerd Hoffmann 2020-08-13 154 vgdev->has_resource_blob = true; bfb6d04f29ac99 Gerd Hoffmann 2020-08-13 155 } ded3d7b8bb13eb Gerd Hoffmann 2020-08-13 156 if (virtio_get_shm_region(vgdev->vdev, &vgdev->host_visible_region, ded3d7b8bb13eb Gerd Hoffmann 2020-08-13 157 VIRTIO_GPU_SHM_ID_HOST_VISIBLE)) { ded3d7b8bb13eb Gerd Hoffmann 2020-08-13 158 if (!devm_request_mem_region(&vgdev->vdev->dev, ded3d7b8bb13eb Gerd Hoffmann 2020-08-13 159 vgdev->host_visible_region.addr, ded3d7b8bb13eb Gerd Hoffmann 2020-08-13 160 vgdev->host_visible_region.len, ded3d7b8bb13eb Gerd Hoffmann 2020-08-13 161 dev_name(&vgdev->vdev->dev))) { ded3d7b8bb13eb Gerd Hoffmann 2020-08-13 162 DRM_ERROR("Could not reserve host visible region\n"); ded3d7b8bb13eb Gerd Hoffmann 2020-08-13 163 goto err_vqs; ded3d7b8bb13eb Gerd Hoffmann 2020-08-13 164 } ded3d7b8bb13eb Gerd Hoffmann 2020-08-13 165 ded3d7b8bb13eb Gerd Hoffmann 2020-08-13 166 DRM_INFO("Host memory window: 0x%lx +0x%lx\n", ded3d7b8bb13eb Gerd Hoffmann 2020-08-13 167 (unsigned long)vgdev->host_visible_region.addr, ded3d7b8bb13eb Gerd Hoffmann 2020-08-13 168 (unsigned long)vgdev->host_visible_region.len); ded3d7b8bb13eb Gerd Hoffmann 2020-08-13 169 vgdev->has_host_visible = true; ded3d7b8bb13eb Gerd Hoffmann 2020-08-13 170 } 62fb7a5e10962a Gerd Hoffmann 2014-10-28 171 ded3d7b8bb13eb Gerd Hoffmann 2020-08-13 172 DRM_INFO("features: %cvirgl %cedid %cresource_blob %chost_visible\n", 9e370dfec4fee8 Gerd Hoffmann 2019-10-18 173 vgdev->has_virgl_3d ? '+' : '-', bfb6d04f29ac99 Gerd Hoffmann 2020-08-13 174 vgdev->has_edid ? '+' : '-', ded3d7b8bb13eb Gerd Hoffmann 2020-08-13 175 vgdev->has_resource_blob ? '+' : '-', ded3d7b8bb13eb Gerd Hoffmann 2020-08-13 176 vgdev->has_host_visible ? '+' : '-'); 9e370dfec4fee8 Gerd Hoffmann 2019-10-18 177 9b2bbdb2275884 Michael S. Tsirkin 2017-03-06 178 ret = virtio_find_vqs(vgdev->vdev, 2, vqs, callbacks, names, NULL); dc5698e80cf724 Dave Airlie 2013-09-09 179 if (ret) { dc5698e80cf724 Dave Airlie 2013-09-09 180 DRM_ERROR("failed to find virt queues\n"); dc5698e80cf724 Dave Airlie 2013-09-09 181 goto err_vqs; dc5698e80cf724 Dave Airlie 2013-09-09 182 } dc5698e80cf724 Dave Airlie 2013-09-09 183 vgdev->ctrlq.vq = vqs[0]; dc5698e80cf724 Dave Airlie 2013-09-09 184 vgdev->cursorq.vq = vqs[1]; dc5698e80cf724 Dave Airlie 2013-09-09 185 ret = virtio_gpu_alloc_vbufs(vgdev); dc5698e80cf724 Dave Airlie 2013-09-09 186 if (ret) { dc5698e80cf724 Dave Airlie 2013-09-09 187 DRM_ERROR("failed to alloc vbufs\n"); dc5698e80cf724 Dave Airlie 2013-09-09 188 goto err_vbufs; dc5698e80cf724 Dave Airlie 2013-09-09 189 } dc5698e80cf724 Dave Airlie 2013-09-09 190 dc5698e80cf724 Dave Airlie 2013-09-09 191 /* get display info */ dc5698e80cf724 Dave Airlie 2013-09-09 192 virtio_cread(vgdev->vdev, struct virtio_gpu_config, dc5698e80cf724 Dave Airlie 2013-09-09 193 num_scanouts, &num_scanouts); dc5698e80cf724 Dave Airlie 2013-09-09 194 vgdev->num_scanouts = min_t(uint32_t, num_scanouts, dc5698e80cf724 Dave Airlie 2013-09-09 195 VIRTIO_GPU_MAX_SCANOUTS); dc5698e80cf724 Dave Airlie 2013-09-09 196 if (!vgdev->num_scanouts) { dc5698e80cf724 Dave Airlie 2013-09-09 197 DRM_ERROR("num_scanouts is zero\n"); dc5698e80cf724 Dave Airlie 2013-09-09 198 ret = -EINVAL; dc5698e80cf724 Dave Airlie 2013-09-09 199 goto err_scanouts; dc5698e80cf724 Dave Airlie 2013-09-09 200 } 62fb7a5e10962a Gerd Hoffmann 2014-10-28 201 DRM_INFO("number of scanouts: %d\n", num_scanouts); 62fb7a5e10962a Gerd Hoffmann 2014-10-28 202 62fb7a5e10962a Gerd Hoffmann 2014-10-28 203 virtio_cread(vgdev->vdev, struct virtio_gpu_config, 62fb7a5e10962a Gerd Hoffmann 2014-10-28 204 num_capsets, &num_capsets); 62fb7a5e10962a Gerd Hoffmann 2014-10-28 205 DRM_INFO("number of cap sets: %d\n", num_capsets); dc5698e80cf724 Dave Airlie 2013-09-09 206 d516e75c71c985 Ezequiel Garcia 2019-01-08 207 virtio_gpu_modeset_init(vgdev); dc5698e80cf724 Dave Airlie 2013-09-09 208 dc5698e80cf724 Dave Airlie 2013-09-09 209 virtio_device_ready(vgdev->vdev); dc5698e80cf724 Dave Airlie 2013-09-09 210 62fb7a5e10962a Gerd Hoffmann 2014-10-28 211 if (num_capsets) 62fb7a5e10962a Gerd Hoffmann 2014-10-28 212 virtio_gpu_get_capsets(vgdev, num_capsets); b4b01b4995fb15 Gerd Hoffmann 2018-10-30 213 if (vgdev->has_edid) b4b01b4995fb15 Gerd Hoffmann 2018-10-30 214 virtio_gpu_cmd_get_edids(vgdev); 441012aff674c8 Dave Airlie 2015-06-16 215 virtio_gpu_cmd_get_display_info(vgdev); 234489ea55f81a Gerd Hoffmann 2020-02-14 216 virtio_gpu_notify(vgdev); 441012aff674c8 Dave Airlie 2015-06-16 217 wait_event_timeout(vgdev->resp_wq, !vgdev->display_info_pending, 441012aff674c8 Dave Airlie 2015-06-16 218 5 * HZ); dc5698e80cf724 Dave Airlie 2013-09-09 219 return 0; dc5698e80cf724 Dave Airlie 2013-09-09 220 dc5698e80cf724 Dave Airlie 2013-09-09 221 err_scanouts: dc5698e80cf724 Dave Airlie 2013-09-09 222 virtio_gpu_free_vbufs(vgdev); dc5698e80cf724 Dave Airlie 2013-09-09 223 err_vbufs: dc5698e80cf724 Dave Airlie 2013-09-09 224 vgdev->vdev->config->del_vqs(vgdev->vdev); dc5698e80cf724 Dave Airlie 2013-09-09 225 err_vqs: dc5698e80cf724 Dave Airlie 2013-09-09 226 kfree(vgdev); dc5698e80cf724 Dave Airlie 2013-09-09 @227 return ret; dc5698e80cf724 Dave Airlie 2013-09-09 228 } dc5698e80cf724 Dave Airlie 2013-09-09 229 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-...@lists.01.org
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