Right now the parameter value is read during video_registration and
cannot be changed afterwards, despite its permissions 0644, that makes
the user believe that the value can be written.
The parameter only affects the beviour of uvc_queue_buffer_complete(),
with only one check per buffer.
We can read the value directly from uvc_queue_buffer_complete() and
therefore allowing changing it with sysfs on the fly.
Signed-off-by: Ricardo Ribalda <ribalda@xxxxxxxxxxxx>
---
drivers/media/usb/uvc/uvc_driver.c | 2 +-
drivers/media/usb/uvc/uvc_queue.c | 6 ++----
drivers/media/usb/uvc/uvcvideo.h | 4 +---
3 files changed, 4 insertions(+), 8 deletions(-)
diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c
index 091145743872..10812a841587 100644
--- a/drivers/media/usb/uvc/uvc_driver.c
+++ b/drivers/media/usb/uvc/uvc_driver.c
@@ -1995,7 +1995,7 @@ int uvc_register_video_device(struct uvc_device *dev,
int ret;
/* Initialize the video buffers queue. */
- ret = uvc_queue_init(queue, type, !uvc_no_drop_param);
+ ret = uvc_queue_init(queue, type);
if (ret)
return ret;
diff --git a/drivers/media/usb/uvc/uvc_queue.c b/drivers/media/usb/uvc/uvc_queue.c
index f8464f0aae1b..2ee142621042 100644
--- a/drivers/media/usb/uvc/uvc_queue.c
+++ b/drivers/media/usb/uvc/uvc_queue.c
@@ -208,8 +208,7 @@ static const struct vb2_ops uvc_meta_queue_qops = {
.stop_streaming = uvc_stop_streaming,
};
-int uvc_queue_init(struct uvc_video_queue *queue, enum v4l2_buf_type type,
- int drop_corrupted)
+int uvc_queue_init(struct uvc_video_queue *queue, enum v4l2_buf_type type)
{
int ret;
@@ -239,7 +238,6 @@ int 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->irqqueue);
- queue->flags = drop_corrupted ? UVC_QUEUE_DROP_CORRUPTED : 0;
return 0;
}
@@ -472,7 +470,7 @@ static void uvc_queue_buffer_complete(struct kref *ref)
struct vb2_buffer *vb = &buf->buf.vb2_buf;
struct uvc_video_queue *queue = vb2_get_drv_priv(vb->vb2_queue);
- if ((queue->flags & UVC_QUEUE_DROP_CORRUPTED) && buf->error) {
+ if (buf->error && !uvc_no_drop_param) {
uvc_queue_buffer_requeue(queue, buf);
return;
}
diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h
index 07f9921d83f2..ebbd8afcf136 100644
--- a/drivers/media/usb/uvc/uvcvideo.h
+++ b/drivers/media/usb/uvc/uvcvideo.h
@@ -316,7 +316,6 @@ struct uvc_buffer {
};
#define UVC_QUEUE_DISCONNECTED (1 << 0)
-#define UVC_QUEUE_DROP_CORRUPTED (1 << 1)
struct uvc_video_queue {
struct vb2_queue queue;
@@ -674,8 +673,7 @@ extern struct uvc_driver uvc_driver;
struct uvc_entity *uvc_entity_by_id(struct uvc_device *dev, int id);
/* Video buffers queue management. */
-int uvc_queue_init(struct uvc_video_queue *queue, enum v4l2_buf_type type,
- int drop_corrupted);
+int uvc_queue_init(struct uvc_video_queue *queue, enum v4l2_buf_type type);
void uvc_queue_release(struct uvc_video_queue *queue);
int uvc_request_buffers(struct uvc_video_queue *queue,
struct v4l2_requestbuffers *rb);
--
2.47.1.613.gc27f4b7a9f-goog
