On Monday 05 of December 2011 at 18:23:44, Janusz Krzysztofik wrote:
> On Monday 05 of December 2011 at 16:15:28, Guennadi Liakhovetski wrote:
> > On 64-bit platforms assigning a pointer to a 32-bit variable causes a
> > compiler warning and cannot actually work. Soc-camera currently doesn't
> > support any 64-bit systems, but such platforms can be added in the
> > and in any case compiler warnings should be avoided.
> >
> > Signed-off-by: Guennadi Liakhovetski <[email protected]>
> > ---
> >
> > This is a long-standing warning in the 3.2 kernel. The fix should only
> > affect sh-mobile platforms, of which I tested some, and the ov6650 camera
> > sensor driver.
> >
> > drivers/media/video/ov6650.c | 2 +-
> > drivers/media/video/sh_mobile_ceu_camera.c | 34
> > +++++++++++++++++----------
> > drivers/media/video/sh_mobile_csi2.c | 4 +-
> > drivers/media/video/soc_camera.c | 2 +-
> > include/media/soc_camera.h | 7 +++++-
> > 5 files changed, 31 insertions(+), 18 deletions(-)
> >
> > diff --git a/drivers/media/video/ov6650.c b/drivers/media/video/ov6650.c
> > index 9f2d26b..6806345 100644
> > --- a/drivers/media/video/ov6650.c
> > +++ b/drivers/media/video/ov6650.c
> > @@ -540,7 +540,7 @@ static u8 to_clkrc(struct v4l2_fract *timeperframe,
> > static int ov6650_s_fmt(struct v4l2_subdev *sd, struct v4l2_mbus_framefmt
> > *mf)
> > {
> > struct i2c_client *client = v4l2_get_subdevdata(sd);
> > - struct soc_camera_device *icd = (struct soc_camera_device *)sd->grp_id;
> > + struct soc_camera_device *icd = v4l2_get_subdev_hostdata(sd);
>
> Hi Guennadi,
> Where is the v4l2_set_subdev_hostdata() supposed to be called from? I
> can find it called only from drivers/media/video/s5p-fimc/fimc-mdevice.c
> for now, and introduced with your patch into sh_mobile_ceu_camera.c
> only. What about other soc_camera host interfaces? Are those supposed to
> call v4l2_set_subdev_hostdata() themselves if a sensor is expected to be
> calling v4l2_set_subdev_hostdata()? Perhaps the soc_camera framework
^
s/set/get/, sorry.
> should take care of this?
>
> > struct soc_camera_sense *sense = icd->sense;
>
> Don't we risk a NULL pointer dereference here in case
> v4l2_set_subdev_hostdata() was not called?
>
> Thanks,
> Janusz
>
> > struct ov6650 *priv = to_ov6650(client);
> > bool half_scale = !is_unscaled_ok(mf->width, mf->height, &priv->rect);
> > diff --git a/drivers/media/video/sh_mobile_ceu_camera.c
> > b/drivers/media/video/sh_mobile_ceu_camera.c
> > index f390682..c51decf 100644
> > --- a/drivers/media/video/sh_mobile_ceu_camera.c
> > +++ b/drivers/media/video/sh_mobile_ceu_camera.c
> > @@ -566,8 +566,10 @@ static int sh_mobile_ceu_add_device(struct
> > soc_camera_device *icd)
> > ret = sh_mobile_ceu_soft_reset(pcdev);
> >
> > csi2_sd = find_csi2(pcdev);
> > - if (csi2_sd)
> > - csi2_sd->grp_id = (long)icd;
> > + if (csi2_sd) {
> > + csi2_sd->grp_id = soc_camera_grp_id(icd);
> > + v4l2_set_subdev_hostdata(csi2_sd, icd);
> > + }
> >
> > ret = v4l2_subdev_call(csi2_sd, core, s_power, 1);
> > if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV) {
> > @@ -768,7 +770,7 @@ static struct v4l2_subdev *find_bus_subdev(struct
> > sh_mobile_ceu_dev *pcdev,
> > {
> > if (pcdev->csi2_pdev) {
> > struct v4l2_subdev *csi2_sd = find_csi2(pcdev);
> > - if (csi2_sd && csi2_sd->grp_id == (u32)icd)
> > + if (csi2_sd && csi2_sd->grp_id == soc_camera_grp_id(icd))
> > return csi2_sd;
> > }
> >
> > @@ -1089,8 +1091,9 @@ static int sh_mobile_ceu_get_formats(struct
> > soc_camera_device *icd, unsigned int
> > /* Try 2560x1920, 1280x960, 640x480, 320x240 */
> > mf.width = 2560 >> shift;
> > mf.height = 1920 >> shift;
> > - ret = v4l2_device_call_until_err(sd->v4l2_dev,
> > (long)icd, video,
> > - s_mbus_fmt, &mf);
> > + ret = v4l2_device_call_until_err(sd->v4l2_dev,
> > + soc_camera_grp_id(icd), video,
> > + s_mbus_fmt, &mf);
> > if (ret < 0)
> > return ret;
> > shift++;
> > @@ -1389,7 +1392,8 @@ static int client_s_fmt(struct soc_camera_device *icd,
> > bool ceu_1to1;
> > int ret;
> >
> > - ret = v4l2_device_call_until_err(sd->v4l2_dev, (long)icd, video,
> > + ret = v4l2_device_call_until_err(sd->v4l2_dev,
> > + soc_camera_grp_id(icd), video,
> > s_mbus_fmt, mf);
> > if (ret < 0)
> > return ret;
> > @@ -1426,8 +1430,9 @@ static int client_s_fmt(struct soc_camera_device *icd,
> > tmp_h = min(2 * tmp_h, max_height);
> > mf->width = tmp_w;
> > mf->height = tmp_h;
> > - ret = v4l2_device_call_until_err(sd->v4l2_dev, (long)icd, video,
> > - s_mbus_fmt, mf);
> > + ret = v4l2_device_call_until_err(sd->v4l2_dev,
> > + soc_camera_grp_id(icd), video,
> > + s_mbus_fmt, mf);
> > dev_geo(dev, "Camera scaled to %ux%u\n",
> > mf->width, mf->height);
> > if (ret < 0) {
> > @@ -1580,8 +1585,9 @@ static int sh_mobile_ceu_set_crop(struct
> > soc_camera_device *icd,
> > }
> >
> > if (interm_width < icd->user_width || interm_height < icd->user_height)
> > {
> > - ret = v4l2_device_call_until_err(sd->v4l2_dev, (int)icd, video,
> > - s_mbus_fmt, &mf);
> > + ret = v4l2_device_call_until_err(sd->v4l2_dev,
> > + soc_camera_grp_id(icd), video,
> > + s_mbus_fmt, &mf);
> > if (ret < 0)
> > return ret;
> >
> > @@ -1867,7 +1873,8 @@ static int sh_mobile_ceu_try_fmt(struct
> > soc_camera_device *icd,
> > mf.code = xlate->code;
> > mf.colorspace = pix->colorspace;
> >
> > - ret = v4l2_device_call_until_err(sd->v4l2_dev, (long)icd, video,
> > try_mbus_fmt, &mf);
> > + ret = v4l2_device_call_until_err(sd->v4l2_dev, soc_camera_grp_id(icd),
> > + video, try_mbus_fmt, &mf);
> > if (ret < 0)
> > return ret;
> >
> > @@ -1891,8 +1898,9 @@ static int sh_mobile_ceu_try_fmt(struct
> > soc_camera_device *icd,
> > */
> > mf.width = 2560;
> > mf.height = 1920;
> > - ret = v4l2_device_call_until_err(sd->v4l2_dev,
> > (long)icd, video,
> > - try_mbus_fmt, &mf);
> > + ret = v4l2_device_call_until_err(sd->v4l2_dev,
> > + soc_camera_grp_id(icd), video,
> > + try_mbus_fmt, &mf);
> > if (ret < 0) {
> > /* Shouldn't actually happen... */
> > dev_err(icd->parent,
> > diff --git a/drivers/media/video/sh_mobile_csi2.c
> > b/drivers/media/video/sh_mobile_csi2.c
> > index ea4f047..8a652b5 100644
> > --- a/drivers/media/video/sh_mobile_csi2.c
> > +++ b/drivers/media/video/sh_mobile_csi2.c
> > @@ -143,7 +143,7 @@ static int sh_csi2_s_mbus_config(struct v4l2_subdev *sd,
> > const struct v4l2_mbus_config *cfg)
> > {
> > struct sh_csi2 *priv = container_of(sd, struct sh_csi2, subdev);
> > - struct soc_camera_device *icd = (struct soc_camera_device *)sd->grp_id;
> > + struct soc_camera_device *icd = v4l2_get_subdev_hostdata(sd);
> > struct v4l2_subdev *client_sd = soc_camera_to_subdev(icd);
> > struct v4l2_mbus_config client_cfg = {.type = V4L2_MBUS_CSI2,
> > .flags = priv->mipi_flags};
> > @@ -202,7 +202,7 @@ static void sh_csi2_hwinit(struct sh_csi2 *priv)
> > static int sh_csi2_client_connect(struct sh_csi2 *priv)
> > {
> > struct sh_csi2_pdata *pdata = priv->pdev->dev.platform_data;
> > - struct soc_camera_device *icd = (struct soc_camera_device
> > *)priv->subdev.grp_id;
> > + struct soc_camera_device *icd = v4l2_get_subdev_hostdata(&priv->subdev);
> > struct v4l2_subdev *client_sd = soc_camera_to_subdev(icd);
> > struct device *dev = v4l2_get_subdevdata(&priv->subdev);
> > struct v4l2_mbus_config cfg;
> > diff --git a/drivers/media/video/soc_camera.c
> > b/drivers/media/video/soc_camera.c
> > index b72580c..8491cf7 100644
> > --- a/drivers/media/video/soc_camera.c
> > +++ b/drivers/media/video/soc_camera.c
> > @@ -1103,7 +1103,7 @@ static int soc_camera_probe(struct soc_camera_device
> > *icd)
> > }
> >
> > sd = soc_camera_to_subdev(icd);
> > - sd->grp_id = (long)icd;
> > + sd->grp_id = soc_camera_grp_id(icd);
> >
> > if (v4l2_ctrl_add_handler(&icd->ctrl_handler, sd->ctrl_handler))
> > goto ectrl;
> > diff --git a/include/media/soc_camera.h b/include/media/soc_camera.h
> > index b1377b9..5fb2c3d 100644
> > --- a/include/media/soc_camera.h
> > +++ b/include/media/soc_camera.h
> > @@ -254,7 +254,7 @@ unsigned long soc_camera_apply_board_flags(struct
> > soc_camera_link *icl,
> > static inline struct video_device *soc_camera_i2c_to_vdev(const struct
> > i2c_client *client)
> > {
> > struct v4l2_subdev *sd = i2c_get_clientdata(client);
> > - struct soc_camera_device *icd = (struct soc_camera_device *)sd->grp_id;
> > + struct soc_camera_device *icd = v4l2_get_subdev_hostdata(sd);
> > return icd ? icd->vdev : NULL;
> > }
> >
> > @@ -279,6 +279,11 @@ static inline struct soc_camera_device
> > *soc_camera_from_vbq(const struct videobu
> > return container_of(vq, struct soc_camera_device, vb_vidq);
> > }
> >
> > +static inline u32 soc_camera_grp_id(const struct soc_camera_device *icd)
> > +{
> > + return (icd->iface << 8) | (icd->devnum + 1);
> > +}
> > +
> > void soc_camera_lock(struct vb2_queue *vq);
> > void soc_camera_unlock(struct vb2_queue *vq);
> >
> >
>
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