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[media] uvcvideo: Use videobuf2 .get_unmapped_area() implementation
The get_unmapped_area() operation was forgotten during conversion to videobuf2. Fix it. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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@ -207,6 +207,19 @@ int uvc_queue_mmap(struct uvc_video_queue *queue, struct vm_area_struct *vma)
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return ret;
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}
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#ifndef CONFIG_MMU
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unsigned long uvc_queue_get_unmapped_area(struct uvc_video_queue *queue,
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unsigned long pgoff)
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{
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unsigned long ret;
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mutex_lock(&queue->mutex);
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ret = vb2_get_unmapped_area(&queue->queue, 0, 0, pgoff, 0);
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mutex_unlock(&queue->mutex);
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return ret;
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}
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#endif
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unsigned int uvc_queue_poll(struct uvc_video_queue *queue, struct file *file,
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poll_table *wait)
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{
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@ -237,36 +250,6 @@ int uvc_queue_allocated(struct uvc_video_queue *queue)
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return allocated;
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}
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#ifndef CONFIG_MMU
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/*
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* Get unmapped area.
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*
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* NO-MMU arch need this function to make mmap() work correctly.
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*/
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unsigned long uvc_queue_get_unmapped_area(struct uvc_video_queue *queue,
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unsigned long pgoff)
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{
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struct uvc_buffer *buffer;
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unsigned int i;
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unsigned long ret;
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mutex_lock(&queue->mutex);
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for (i = 0; i < queue->count; ++i) {
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buffer = &queue->buffer[i];
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if ((buffer->buf.m.offset >> PAGE_SHIFT) == pgoff)
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break;
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}
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if (i == queue->count) {
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ret = -EINVAL;
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goto done;
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}
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ret = (unsigned long)buf->mem;
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done:
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mutex_unlock(&queue->mutex);
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return ret;
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}
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#endif
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/*
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* Enable or disable the video buffers queue.
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*
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