em28xx: add media controller support

Hello Mauro Carvalho Chehab,

The patch 37ecc7b1278f: "[media] em28xx: add media controller support" from Jan 27, 2016, leads to the following static checker warning:

	drivers/media/usb/em28xx/em28xx-cards.c:3028 em28xx_media_device_init()
	warn: this array is probably non-NULL. 'dev->name'

drivers/media/usb/em28xx/em28xx-cards.c
3016 static int em28xx_media_device_init(struct em28xx *dev,
3017 struct usb_device *udev)
3018 {
3019 #ifdef CONFIG_MEDIA_CONTROLLER
3020 struct media_device *mdev;
3021
3022 mdev = kzalloc(sizeof(*mdev), GFP_KERNEL);
3023 if (!mdev)
3024 return -ENOMEM;
3025
3026 mdev->dev = &udev->dev;
3027
3028 if (!dev->name)
3029 strlcpy(mdev->model, "unknown em28xx", sizeof(mdev->model));
3030 else
3031 strlcpy(mdev->model, dev->name, sizeof(mdev->model));

We either want to remove the NULL test or test for the empty string.

  3032          if (udev->serial)
  3033                  strlcpy(mdev->serial, udev->serial, sizeof(mdev->serial));
  3034          strcpy(mdev->bus_info, udev->devpath);
  3035          mdev->hw_revision = le16_to_cpu(udev->descriptor.bcdDevice);
  3036          mdev->driver_version = LINUX_VERSION_CODE;
  3037  
  3038          media_device_init(mdev);
  3039  
  3040          dev->media_dev = mdev;
  3041  #endif
  3042          return 0;
  3043  }

regards,
dan carpenter