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[media] stk-webcam: implement support for count == 0 when calling REQBUFS
The spec specifies that setting count to 0 in v4l2_requestbuffers should result in releasing any streaming resources and the stream ownership. Implement this. Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Tested-by: Arvydas Sidorenko <asido4@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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@ -1046,6 +1046,13 @@ static int stk_vidioc_reqbufs(struct file *filp,
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if (is_streaming(dev)
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|| (dev->owner && dev->owner != filp))
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return -EBUSY;
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stk_free_buffers(dev);
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if (rb->count == 0) {
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stk_camera_write_reg(dev, 0x0, 0x49); /* turn off the LED */
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unset_initialised(dev);
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dev->owner = NULL;
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return 0;
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}
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dev->owner = filp;
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/*FIXME If they ask for zero, we must stop streaming and free */
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