Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media

Pull media updates from Mauro Carvalho Chehab:

 - Missing MAINTAINERS entries were added for several drivers

 - Adds V4L2 support for DMABUF handling, allowing zero-copy buffer
   sharing between V4L2 devices and GPU

 - Got rid of all warnings when compiling with W=1 on x86

 - Add a new driver for Exynos hardware (s3c-camif)

 - Several bug fixes, cleanups and driver improvements

* 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (243 commits)
  [media] omap3isp: Replace cpu_is_omap3630() with ISP revision check
  [media] omap3isp: Prepare/unprepare clocks before/after enable/disable
  [media] omap3isp: preview: Add support for 8-bit formats at the sink pad
  [media] omap3isp: Replace printk with dev_*
  [media] omap3isp: Find source pad from external entity
  [media] omap3isp: Configure CSI-2 phy based on platform data
  [media] omap3isp: Add PHY routing configuration
  [media] omap3isp: Add CSI configuration registers from control block to ISP resources
  [media] omap3isp: Remove unneeded module memory address definitions
  [media] omap3isp: Use monotonic timestamps for statistics buffers
  [media] uvcvideo: Fix control value clamping for unsigned integer controls
  [media] uvcvideo: Mark first output terminal as default video node
  [media] uvcvideo: Add VIDIOC_[GS]_PRIORITY support
  [media] uvcvideo: Return -ENOTTY for unsupported ioctls
  [media] uvcvideo: Set device_caps in VIDIOC_QUERYCAP
  [media] uvcvideo: Don't fail when an unsupported format is requested
  [media] uvcvideo: Return -EACCES when trying to access a read/write-only control
  [media] uvcvideo: Set error_idx properly for extended controls API failures
  [media] rtl28xxu: add NOXON DAB/DAB+ USB dongle rev 2
  [media] fc2580: write some registers conditionally
  ...

1 files changed, 15 insertions, 4 deletions

diff --git a/drivers/media/v4l2-core/v4l2-mem2mem.c b/drivers/media/v4l2-core/v4l2-mem2mem.c
index 3ac83583ad7a..438ea45d1074 100644
--- a/drivers/media/v4l2-core/v4l2-mem2mem.c
+++ b/drivers/media/v4l2-core/v4l2-mem2mem.c
@@ -369,6 +369,19 @@ int v4l2_m2m_dqbuf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
 EXPORT_SYMBOL_GPL(v4l2_m2m_dqbuf);
 
 /**
+ * v4l2_m2m_expbuf() - export a source or destination buffer, depending on
+ * the type
+ */
+int v4l2_m2m_expbuf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
+		  struct v4l2_exportbuffer *eb)
+{
+	struct vb2_queue *vq;
+
+	vq = v4l2_m2m_get_vq(m2m_ctx, eb->type);
+	return vb2_expbuf(vq, eb);
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_expbuf);
+/**
  * v4l2_m2m_streamon() - turn on streaming for a video queue
  */
 int v4l2_m2m_streamon(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
@@ -510,12 +523,10 @@ struct v4l2_m2m_dev *v4l2_m2m_init(struct v4l2_m2m_ops *m2m_ops)
 {
 	struct v4l2_m2m_dev *m2m_dev;
 
-	if (!m2m_ops)
+	if (!m2m_ops || WARN_ON(!m2m_ops->device_run) ||
+			WARN_ON(!m2m_ops->job_abort))
 		return ERR_PTR(-EINVAL);
 
-	BUG_ON(!m2m_ops->device_run);
-	BUG_ON(!m2m_ops->job_abort);
-
 	m2m_dev = kzalloc(sizeof *m2m_dev, GFP_KERNEL);
 	if (!m2m_dev)
 		return ERR_PTR(-ENOMEM);