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path: root/drivers/media/video/uvc/uvc_queue.c
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Diffstat (limited to 'drivers/media/video/uvc/uvc_queue.c')
-rw-r--r--drivers/media/video/uvc/uvc_queue.c23
1 files changed, 18 insertions, 5 deletions
diff --git a/drivers/media/video/uvc/uvc_queue.c b/drivers/media/video/uvc/uvc_queue.c
index 5646a6a3293..42546342e97 100644
--- a/drivers/media/video/uvc/uvc_queue.c
+++ b/drivers/media/video/uvc/uvc_queue.c
@@ -79,12 +79,13 @@
*
*/
-void uvc_queue_init(struct uvc_video_queue *queue)
+void uvc_queue_init(struct uvc_video_queue *queue, enum v4l2_buf_type type)
{
mutex_init(&queue->mutex);
spin_lock_init(&queue->irqlock);
INIT_LIST_HEAD(&queue->mainqueue);
INIT_LIST_HEAD(&queue->irqqueue);
+ queue->type = type;
}
/*
@@ -132,7 +133,7 @@ int uvc_alloc_buffers(struct uvc_video_queue *queue, unsigned int nbuffers,
queue->buffer[i].buf.index = i;
queue->buffer[i].buf.m.offset = i * bufsize;
queue->buffer[i].buf.length = buflength;
- queue->buffer[i].buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ queue->buffer[i].buf.type = queue->type;
queue->buffer[i].buf.sequence = 0;
queue->buffer[i].buf.field = V4L2_FIELD_NONE;
queue->buffer[i].buf.memory = V4L2_MEMORY_MMAP;
@@ -226,7 +227,7 @@ int uvc_queue_buffer(struct uvc_video_queue *queue,
uvc_trace(UVC_TRACE_CAPTURE, "Queuing buffer %u.\n", v4l2_buf->index);
- if (v4l2_buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
+ if (v4l2_buf->type != queue->type ||
v4l2_buf->memory != V4L2_MEMORY_MMAP) {
uvc_trace(UVC_TRACE_CAPTURE, "[E] Invalid buffer type (%u) "
"and/or memory (%u).\n", v4l2_buf->type,
@@ -249,6 +250,13 @@ int uvc_queue_buffer(struct uvc_video_queue *queue,
goto done;
}
+ if (v4l2_buf->type == V4L2_BUF_TYPE_VIDEO_OUTPUT &&
+ v4l2_buf->bytesused > buf->buf.length) {
+ uvc_trace(UVC_TRACE_CAPTURE, "[E] Bytes used out of bounds.\n");
+ ret = -EINVAL;
+ goto done;
+ }
+
spin_lock_irqsave(&queue->irqlock, flags);
if (queue->flags & UVC_QUEUE_DISCONNECTED) {
spin_unlock_irqrestore(&queue->irqlock, flags);
@@ -256,7 +264,11 @@ int uvc_queue_buffer(struct uvc_video_queue *queue,
goto done;
}
buf->state = UVC_BUF_STATE_QUEUED;
- buf->buf.bytesused = 0;
+ if (v4l2_buf->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ buf->buf.bytesused = 0;
+ else
+ buf->buf.bytesused = v4l2_buf->bytesused;
+
list_add_tail(&buf->stream, &queue->mainqueue);
list_add_tail(&buf->queue, &queue->irqqueue);
spin_unlock_irqrestore(&queue->irqlock, flags);
@@ -289,7 +301,7 @@ int uvc_dequeue_buffer(struct uvc_video_queue *queue,
struct uvc_buffer *buf;
int ret = 0;
- if (v4l2_buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
+ if (v4l2_buf->type != queue->type ||
v4l2_buf->memory != V4L2_MEMORY_MMAP) {
uvc_trace(UVC_TRACE_CAPTURE, "[E] Invalid buffer type (%u) "
"and/or memory (%u).\n", v4l2_buf->type,
@@ -397,6 +409,7 @@ int uvc_queue_enable(struct uvc_video_queue *queue, int enable)
}
queue->sequence = 0;
queue->flags |= UVC_QUEUE_STREAMING;
+ queue->buf_used = 0;
} else {
uvc_queue_cancel(queue, 0);
INIT_LIST_HEAD(&queue->mainqueue);