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Date: Fri, 2 Apr 2021 11:50:44 +0900 From: Tomasz Figa <tfiga@...omium.org> To: Ricardo Ribalda <ribalda@...omium.org> Cc: Laurent Pinchart <laurent.pinchart@...asonboard.com>, Mauro Carvalho Chehab <mchehab@...nel.org>, Hans Verkuil <hverkuil-cisco@...all.nl>, Sergey Senozhatsky <sergey.senozhatsky@...il.com>, Linux Media Mailing List <linux-media@...r.kernel.org>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, Hans Verkuil <hverkuil@...all.nl> Subject: Re: [PATCH v9 22/22] uvc: use vb2 ioctl and fop helpers Hi Ricardo, On Fri, Mar 26, 2021 at 7:00 PM Ricardo Ribalda <ribalda@...omium.org> wrote: > > From: Hans Verkuil <hverkuil@...all.nl> > > When uvc was written the vb2 ioctl and file operation helpers didn't exist. > > This patch switches uvc over to those helpers, which removes a lot of boilerplate > code and simplifies VIDIOC_G/S_PRIORITY handling and allows us to drop the > 'privileges' scheme, since that's now handled inside the vb2 helpers. > > This makes it possible for uvc to pass the v4l2-compliance streaming tests. > > Signed-off-by: Hans Verkuil <hverkuil-cisco@...all.nl> Thanks for the patch. Did you perhaps miss adding your sign-off? Also, see my comments inline. [snip] > @@ -1166,11 +969,6 @@ static int uvc_ioctl_s_parm(struct file *file, void *fh, > { > struct uvc_fh *handle = fh; > struct uvc_streaming *stream = handle->stream; > - int ret; > - > - ret = uvc_acquire_privileges(handle); > - if (ret < 0) > - return ret; Why is it okay not to acquire the privileges here? > > return uvc_v4l2_set_streamparm(stream, parm); > } Best regards, Tomasz
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