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SubjectRe: [PATCH] media: i2c-polling: add i2c-polling driver
Hi Matt,

[auto build test ERROR on linuxtv-media/master]
[also build test ERROR on v4.9-rc4 next-20161028]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url: https://github.com/0day-ci/linux/commits/Matt-Ranostay/media-i2c-polling-add-i2c-polling-driver/20161107-092444
base: git://linuxtv.org/media_tree.git master
config: x86_64-randconfig-x017-11071730 (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
# save the attached .config to linux build tree
make ARCH=x86_64

All error/warnings (new ones prefixed by >>):

drivers/media/i2c/i2c-polling.c: In function 'i2c_polling_probe':
>> drivers/media/i2c/i2c-polling.c:379:9: error: implicit declaration of function 'kzalloc' [-Werror=implicit-function-declaration]
data = kzalloc(sizeof(*data), GFP_KERNEL);
^~~~~~~
>> drivers/media/i2c/i2c-polling.c:379:7: warning: assignment makes pointer from integer without a cast [-Wint-conversion]
data = kzalloc(sizeof(*data), GFP_KERNEL);
^
>> drivers/media/i2c/i2c-polling.c:432:2: error: implicit declaration of function 'kfree' [-Werror=implicit-function-declaration]
kfree(data);
^~~~~
cc1: some warnings being treated as errors

vim +/kzalloc +379 drivers/media/i2c/i2c-polling.c

373 {
374 struct i2c_polling_data *data;
375 struct v4l2_device *v4l2_dev;
376 struct vb2_queue *queue;
377 int ret;
378
> 379 data = kzalloc(sizeof(*data), GFP_KERNEL);
380 if (!data)
381 return -ENOMEM;
382
383 data->chip = &i2c_polling_chips[id->driver_data];
384 data->client = client;
385 data->last_update = jiffies;
386 v4l2_dev = &data->v4l2_dev;
387 strlcpy(v4l2_dev->name, I2C_POLLING_DRIVER, sizeof(v4l2_dev->name));
388
389 ret = v4l2_device_register(&client->dev, v4l2_dev);
390 if (ret < 0)
391 goto error_free_device;
392
393 mutex_init(&data->lock);
394 mutex_init(&data->queue_lock);
395
396 queue = &data->vb_vidq;
397 queue->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
398 queue->io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ;
399 queue->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
400 queue->drv_priv = data;
401 queue->ops = &i2c_polling_video_qops;
402 queue->mem_ops = &vb2_vmalloc_memops;
403
404 ret = vb2_queue_init(queue);
405 if (ret < 0)
406 goto error_free_device;
407
408 data->vdev.queue = queue;
409 data->vdev.queue->lock = &data->queue_lock;
410
411 strlcpy(data->vdev.name, "I2C Polling Video", sizeof(data->vdev.name));
412
413 data->vdev.v4l2_dev = v4l2_dev;
414 data->vdev.fops = &i2c_polling_fops;
415 data->vdev.lock = &data->lock;
416 data->vdev.ioctl_ops = &i2c_polling_ioctl_ops;
417 data->vdev.release = video_device_release_empty;
418
419 video_set_drvdata(&data->vdev, data);
420 i2c_set_clientdata(client, data);
421
422 ret = video_register_device(&data->vdev, VFL_TYPE_GRABBER, -1);
423 if (ret < 0)
424 goto error_unregister_device;
425
426 return 0;
427
428 error_unregister_device:
429 v4l2_device_unregister(v4l2_dev);
430
431 error_free_device:
> 432 kfree(data);
433
434 return ret;
435 }

---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
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