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
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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