diff options
| author | Dan Vacura <w36195@motorola.com> | 2022-04-13 14:24:02 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-04-21 18:15:07 +0200 |
| commit | be30e3502771ac0b5080ec61223d915354cde1cc (patch) | |
| tree | b642d401f86d44c73e9aefcecbc1031386e9b15f | |
| parent | 324e4f85070f89b58c5f9926370ad19dea907dc7 (diff) | |
| download | lwn-be30e3502771ac0b5080ec61223d915354cde1cc.tar.gz lwn-be30e3502771ac0b5080ec61223d915354cde1cc.zip | |
usb: gadget: uvc: remove pause flag use
The pause flag doesn't appear to serve a purpose as it is possible for
the pump worker thread to not be running when new buffers are queued.
Before the following change was introduced: "43cd0023872e usb: gadget:
uvc_video: add worker to handle the frame pumping", the pause flag
status was discarded and never returned. This masked a current issues of
the userspace receiving non-zero values (considered unsuccessful) and
prevents trace_v4l2_qbuf() from being called.
Signed-off-by: Dan Vacura <w36195@motorola.com>
Link: https://lore.kernel.org/r/20220413192402.26063-1-w36195@motorola.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/usb/gadget/function/uvc_queue.c | 15 | ||||
| -rw-r--r-- | drivers/usb/gadget/function/uvc_queue.h | 1 |
2 files changed, 1 insertions, 15 deletions
diff --git a/drivers/usb/gadget/function/uvc_queue.c b/drivers/usb/gadget/function/uvc_queue.c index d852ac9e47e7..8fd2f4a3dc4c 100644 --- a/drivers/usb/gadget/function/uvc_queue.c +++ b/drivers/usb/gadget/function/uvc_queue.c @@ -185,18 +185,7 @@ int uvcg_query_buffer(struct uvc_video_queue *queue, struct v4l2_buffer *buf) int uvcg_queue_buffer(struct uvc_video_queue *queue, struct v4l2_buffer *buf) { - unsigned long flags; - int ret; - - ret = vb2_qbuf(&queue->queue, NULL, buf); - if (ret < 0) - return ret; - - spin_lock_irqsave(&queue->irqlock, flags); - ret = (queue->flags & UVC_QUEUE_PAUSED) != 0; - queue->flags &= ~UVC_QUEUE_PAUSED; - spin_unlock_irqrestore(&queue->irqlock, flags); - return ret; + return vb2_qbuf(&queue->queue, NULL, buf); } /* @@ -362,8 +351,6 @@ struct uvc_buffer *uvcg_queue_head(struct uvc_video_queue *queue) if (!list_empty(&queue->irqqueue)) buf = list_first_entry(&queue->irqqueue, struct uvc_buffer, queue); - else - queue->flags |= UVC_QUEUE_PAUSED; return buf; } diff --git a/drivers/usb/gadget/function/uvc_queue.h b/drivers/usb/gadget/function/uvc_queue.h index 05360a0767f6..42aaf8b227dd 100644 --- a/drivers/usb/gadget/function/uvc_queue.h +++ b/drivers/usb/gadget/function/uvc_queue.h @@ -43,7 +43,6 @@ struct uvc_buffer { #define UVC_QUEUE_DISCONNECTED (1 << 0) #define UVC_QUEUE_DROP_INCOMPLETE (1 << 1) -#define UVC_QUEUE_PAUSED (1 << 2) struct uvc_video_queue { struct vb2_queue queue; |