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FROMGIT: usb: gadget: uvc: remove pause flag use

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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>

Bug: 229140375
(cherry picked from commit be30e3502771ac0b5080ec61223d915354cde1cc
 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-next)
Change-Id: Id841e7f0dc6c79f74ca41bb93f2504effc2fefd8
Signed-off-by: Dan Vacura <w36195@motorola.com>
This commit is contained in:
Dan Vacura
2022-04-13 14:24:02 -05:00
parent 36aa07174b
commit a35bc53848
2 changed files with 1 additions and 15 deletions
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15
drivers/usb/gadget/function/uvc_queue.c
View File

@@ -169,18 +169,7 @@ 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);
}
/*
@@ -348,8 +337,6 @@ 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;
}

1
drivers/usb/gadget/function/uvc_queue.h
View File

@@ -40,7 +40,6 @@ 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;