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| author | Hans Verkuil <hverkuil@xs4all.nl> | 2018-02-02 08:05:23 -0500 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2018-02-26 09:32:59 -0500 |
| commit | 3103c7b4ad08d813ec5c8187f7a9ddea55acf027 (patch) | |
| tree | f18c5f8418e9c12e37e941b25712dd858d1a5ecc /drivers/media/v4l2-core | |
| parent | 1ceda32bf3f2f5542af805a70c6b59123e3c76c9 (diff) | |
| download | linux-3103c7b4ad08d813ec5c8187f7a9ddea55acf027.tar.gz linux-3103c7b4ad08d813ec5c8187f7a9ddea55acf027.tar.bz2 linux-3103c7b4ad08d813ec5c8187f7a9ddea55acf027.zip | |
media: v4l2-subdev: without controls return -ENOTTY
If the subdev did not define any controls, then return -ENOTTY if
userspace attempts to call these ioctls.
The control framework functions will return -EINVAL, not -ENOTTY if
vfh->ctrl_handler is NULL.
Several of these framework functions are also called directly from
drivers, so I don't want to change the error code there.
Found with vimc and v4l2-compliance.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Diffstat (limited to 'drivers/media/v4l2-core')
| -rw-r--r-- | drivers/media/v4l2-core/v4l2-subdev.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c index 74fe8083cf26..ec0bd6411aa7 100644 --- a/drivers/media/v4l2-core/v4l2-subdev.c +++ b/drivers/media/v4l2-core/v4l2-subdev.c @@ -187,27 +187,51 @@ static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg) switch (cmd) { case VIDIOC_QUERYCTRL: + /* + * TODO: this really should be folded into v4l2_queryctrl (this + * currently returns -EINVAL for NULL control handlers). + * However, v4l2_queryctrl() is still called directly by + * drivers as well and until that has been addressed I believe + * it is safer to do the check here. The same is true for the + * other control ioctls below. + */ + if (!vfh->ctrl_handler) + return -ENOTTY; return v4l2_queryctrl(vfh->ctrl_handler, arg); case VIDIOC_QUERY_EXT_CTRL: + if (!vfh->ctrl_handler) + return -ENOTTY; return v4l2_query_ext_ctrl(vfh->ctrl_handler, arg); case VIDIOC_QUERYMENU: + if (!vfh->ctrl_handler) + return -ENOTTY; return v4l2_querymenu(vfh->ctrl_handler, arg); case VIDIOC_G_CTRL: + if (!vfh->ctrl_handler) + return -ENOTTY; return v4l2_g_ctrl(vfh->ctrl_handler, arg); case VIDIOC_S_CTRL: + if (!vfh->ctrl_handler) + return -ENOTTY; return v4l2_s_ctrl(vfh, vfh->ctrl_handler, arg); case VIDIOC_G_EXT_CTRLS: + if (!vfh->ctrl_handler) + return -ENOTTY; return v4l2_g_ext_ctrls(vfh->ctrl_handler, arg); case VIDIOC_S_EXT_CTRLS: + if (!vfh->ctrl_handler) + return -ENOTTY; return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, arg); case VIDIOC_TRY_EXT_CTRLS: + if (!vfh->ctrl_handler) + return -ENOTTY; return v4l2_try_ext_ctrls(vfh->ctrl_handler, arg); case VIDIOC_DQEVENT: |