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| author | Sakari Ailus <sakari.ailus@linux.intel.com> | 2014-06-12 13:09:40 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <m.chehab@samsung.com> | 2014-07-21 19:44:45 -0300 |
| commit | 5a573925159aeec1dd159627d849dc6c66000faf (patch) | |
| tree | 6464a008eeca716c199dc10c8a23a67d2fb3ecca /drivers/media/v4l2-core | |
| parent | 605b38403b710ca01a242448241bc45c722b341b (diff) | |
| download | blackbird-op-linux-5a573925159aeec1dd159627d849dc6c66000faf.tar.gz blackbird-op-linux-5a573925159aeec1dd159627d849dc6c66000faf.zip | |
[media] v4l: ctrls: Provide an unlocked variant of v4l2_ctrl_modify_range()
Drivers may use the v4l2_ctrl_modify_range() internally as part of other
operations that need to be both serialised using a driver's lock which can
also be used to serialise access to the control handler. Provide an unlocked
version of the function, __v4l2_ctrl_modify_range() which then may be used
by drivers for the purpose.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
Diffstat (limited to 'drivers/media/v4l2-core')
| -rw-r--r-- | drivers/media/v4l2-core/v4l2-ctrls.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c index 8552c832074a..9cd978334b89 100644 --- a/drivers/media/v4l2-core/v4l2-ctrls.c +++ b/drivers/media/v4l2-core/v4l2-ctrls.c @@ -3213,12 +3213,14 @@ void v4l2_ctrl_notify(struct v4l2_ctrl *ctrl, v4l2_ctrl_notify_fnc notify, void } EXPORT_SYMBOL(v4l2_ctrl_notify); -int v4l2_ctrl_modify_range(struct v4l2_ctrl *ctrl, +int __v4l2_ctrl_modify_range(struct v4l2_ctrl *ctrl, s64 min, s64 max, u64 step, s64 def) { int ret; struct v4l2_ext_control c; + lockdep_assert_held(ctrl->handler->lock); + switch (ctrl->type) { case V4L2_CTRL_TYPE_INTEGER: case V4L2_CTRL_TYPE_INTEGER64: @@ -3237,7 +3239,6 @@ int v4l2_ctrl_modify_range(struct v4l2_ctrl *ctrl, default: return -EINVAL; } - v4l2_ctrl_lock(ctrl); ctrl->minimum = min; ctrl->maximum = max; ctrl->step = step; @@ -3249,10 +3250,9 @@ int v4l2_ctrl_modify_range(struct v4l2_ctrl *ctrl, ret = set_ctrl(NULL, ctrl, &c, V4L2_EVENT_CTRL_CH_RANGE); else send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_RANGE); - v4l2_ctrl_unlock(ctrl); return ret; } -EXPORT_SYMBOL(v4l2_ctrl_modify_range); +EXPORT_SYMBOL(__v4l2_ctrl_modify_range); static int v4l2_ctrl_add_event(struct v4l2_subscribed_event *sev, unsigned elems) { |
