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Date: Thu, 18 Mar 2021 08:17:10 +0100
From: Ricardo Ribalda <ribalda@...omium.org>
To: Hans Verkuil <hverkuil-cisco@...all.nl>
Cc: Laurent Pinchart <laurent.pinchart@...asonboard.com>,
Mauro Carvalho Chehab <mchehab@...nel.org>,
Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
Linux Media Mailing List <linux-media@...r.kernel.org>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Tomasz Figa <tfiga@...omium.org>, stable@...r.kernel.org
Subject: Re: [PATCH v6 01/17] media: v4l2-ioctl: check_ext_ctrls: Fix
multiclass V4L2_CTRL_WHICH_DEF_VAL
Hi Hans
Can I merge 1-3, but leave 4 as a separate one? It helps to tell a
story for 5 and 6.
Thanks
On Thu, Mar 18, 2021 at 8:14 AM Hans Verkuil <hverkuil-cisco@...all.nl> wrote:
>
> Hi Ricardo,
>
> On 17/03/2021 17:44, Ricardo Ribalda wrote:
> > Drivers that do not use the ctrl-framework use this function instead.
> >
> > - Do not check for multiple classes when getting the DEF_VAL.
> >
> > Fixes v4l2-compliance:
> > Control ioctls (Input 0):
> > fail: v4l2-test-controls.cpp(813): doioctl(node, VIDIOC_G_EXT_CTRLS, &ctrls)
> > test VIDIOC_G/S/TRY_EXT_CTRLS: FAIL
>
> Can you merge patches 1-4 into a single patch? It's really one big fix since
> this code was never updated when new 'which' values were added. So keeping it
> together is, for once, actually preferred.
>
> You can add my:
>
> Reviewed-by: Hans Verkuil <hverkuil-cisco@...all.nl>
>
> after these 4 patches are merged. It looks much nicer now.
>
> Regards,
>
> Hans
>
> >
> > Cc: stable@...r.kernel.org
> > Fixes: 6fa6f831f095 ("media: v4l2-ctrls: add core request support")
> > Suggested-by: Hans Verkuil <hverkuil-cisco@...all.nl>
> > Signed-off-by: Ricardo Ribalda <ribalda@...omium.org>
> > Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>
> > ---
> > drivers/media/v4l2-core/v4l2-ioctl.c | 47 ++++++++++++++++------------
> > 1 file changed, 27 insertions(+), 20 deletions(-)
> >
> > diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c
> > index 31d1342e61e8..403f957a1012 100644
> > --- a/drivers/media/v4l2-core/v4l2-ioctl.c
> > +++ b/drivers/media/v4l2-core/v4l2-ioctl.c
> > @@ -908,7 +908,7 @@ static void v4l_print_default(const void *arg, bool write_only)
> > pr_cont("driver-specific ioctl\n");
> > }
> >
> > -static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
> > +static bool check_ext_ctrls(struct v4l2_ext_controls *c, unsigned long ioctl)
> > {
> > __u32 i;
> >
> > @@ -917,23 +917,30 @@ static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
> > for (i = 0; i < c->count; i++)
> > c->controls[i].reserved2[0] = 0;
> >
> > - /* V4L2_CID_PRIVATE_BASE cannot be used as control class
> > - when using extended controls.
> > - Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
> > - is it allowed for backwards compatibility.
> > - */
> > - if (!allow_priv && c->which == V4L2_CID_PRIVATE_BASE)
> > - return 0;
> > - if (!c->which)
> > - return 1;
> > + switch (c->which) {
> > + case V4L2_CID_PRIVATE_BASE:
> > + /*
> > + * V4L2_CID_PRIVATE_BASE cannot be used as control class
> > + * when using extended controls.
> > + * Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
> > + * is it allowed for backwards compatibility.
> > + */
> > + if (ioctl == VIDIOC_G_CTRL || ioctl == VIDIOC_S_CROP)
> > + return false;
> > + break;
> > + case V4L2_CTRL_WHICH_DEF_VAL:
> > + case V4L2_CTRL_WHICH_CUR_VAL:
> > + return true;
> > + }
> > +
> > /* Check that all controls are from the same control class. */
> > for (i = 0; i < c->count; i++) {
> > if (V4L2_CTRL_ID2WHICH(c->controls[i].id) != c->which) {
> > c->error_idx = i;
> > - return 0;
> > + return false;
> > }
> > }
> > - return 1;
> > + return true;
> > }
> >
> > static int check_fmt(struct file *file, enum v4l2_buf_type type)
> > @@ -2229,7 +2236,7 @@ static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
> > ctrls.controls = &ctrl;
> > ctrl.id = p->id;
> > ctrl.value = p->value;
> > - if (check_ext_ctrls(&ctrls, 1)) {
> > + if (check_ext_ctrls(&ctrls, VIDIOC_G_CTRL)) {
> > int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
> >
> > if (ret == 0)
> > @@ -2263,7 +2270,7 @@ static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
> > ctrls.controls = &ctrl;
> > ctrl.id = p->id;
> > ctrl.value = p->value;
> > - if (check_ext_ctrls(&ctrls, 1))
> > + if (check_ext_ctrls(&ctrls, VIDIOC_S_CTRL))
> > return ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
> > return -EINVAL;
> > }
> > @@ -2285,8 +2292,8 @@ static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
> > vfd, vfd->v4l2_dev->mdev, p);
> > if (ops->vidioc_g_ext_ctrls == NULL)
> > return -ENOTTY;
> > - return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) :
> > - -EINVAL;
> > + return check_ext_ctrls(p, VIDIOC_G_EXT_CTRLS) ?
> > + ops->vidioc_g_ext_ctrls(file, fh, p) : -EINVAL;
> > }
> >
> > static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
> > @@ -2306,8 +2313,8 @@ static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
> > vfd, vfd->v4l2_dev->mdev, p);
> > if (ops->vidioc_s_ext_ctrls == NULL)
> > return -ENOTTY;
> > - return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) :
> > - -EINVAL;
> > + return check_ext_ctrls(p, VIDIOC_S_EXT_CTRLS) ?
> > + ops->vidioc_s_ext_ctrls(file, fh, p) : -EINVAL;
> > }
> >
> > static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
> > @@ -2327,8 +2334,8 @@ static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
> > vfd, vfd->v4l2_dev->mdev, p);
> > if (ops->vidioc_try_ext_ctrls == NULL)
> > return -ENOTTY;
> > - return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) :
> > - -EINVAL;
> > + return check_ext_ctrls(p, VIDIOC_TRY_EXT_CTRLS) ?
> > + ops->vidioc_try_ext_ctrls(file, fh, p) : -EINVAL;
> > }
> >
> > /*
> >
>
--
Ricardo Ribalda
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