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Subject[RFCv3 09/17] v4l2-ctrls: use ref in helper instead of ctrl
Date
From: Hans Verkuil <hans.verkuil@cisco.com>

The next patch needs the reference to a control instead of the
control itself, so change struct v4l2_ctrl_helper accordingly.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Alexandre Courbot <acourbot@chromium.org>
---
drivers/media/v4l2-core/v4l2-ctrls.c | 18 +++++++++---------
1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c
index c692a6d925c6..9090a49eef91 100644
--- a/drivers/media/v4l2-core/v4l2-ctrls.c
+++ b/drivers/media/v4l2-core/v4l2-ctrls.c
@@ -37,8 +37,8 @@
struct v4l2_ctrl_helper {
/* Pointer to the control reference of the master control */
struct v4l2_ctrl_ref *mref;
- /* The control corresponding to the v4l2_ext_control ID field. */
- struct v4l2_ctrl *ctrl;
+ /* The control ref corresponding to the v4l2_ext_control ID field. */
+ struct v4l2_ctrl_ref *ref;
/* v4l2_ext_control index of the next control belonging to the
same cluster, or 0 if there isn't any. */
u32 next;
@@ -2856,6 +2856,7 @@ static int prepare_ext_ctrls(struct v4l2_ctrl_handler *hdl,
ref = find_ref_lock(hdl, id);
if (ref == NULL)
return -EINVAL;
+ h->ref = ref;
ctrl = ref->ctrl;
if (ctrl->flags & V4L2_CTRL_FLAG_DISABLED)
return -EINVAL;
@@ -2878,7 +2879,6 @@ static int prepare_ext_ctrls(struct v4l2_ctrl_handler *hdl,
}
/* Store the ref to the master control of the cluster */
h->mref = ref;
- h->ctrl = ctrl;
/* Initially set next to 0, meaning that there is no other
control in this helper array belonging to the same
cluster */
@@ -2963,7 +2963,7 @@ int v4l2_g_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct v4l2_ext_controls *cs
cs->error_idx = cs->count;

for (i = 0; !ret && i < cs->count; i++)
- if (helpers[i].ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY)
+ if (helpers[i].ref->ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY)
ret = -EACCES;

for (i = 0; !ret && i < cs->count; i++) {
@@ -2998,7 +2998,7 @@ int v4l2_g_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct v4l2_ext_controls *cs

do {
ret = ctrl_to_user(cs->controls + idx,
- helpers[idx].ctrl);
+ helpers[idx].ref->ctrl);
idx = helpers[idx].next;
} while (!ret && idx);
}
@@ -3137,7 +3137,7 @@ static int validate_ctrls(struct v4l2_ext_controls *cs,

cs->error_idx = cs->count;
for (i = 0; i < cs->count; i++) {
- struct v4l2_ctrl *ctrl = helpers[i].ctrl;
+ struct v4l2_ctrl *ctrl = helpers[i].ref->ctrl;
union v4l2_ctrl_ptr p_new;

cs->error_idx = i;
@@ -3249,7 +3249,7 @@ static int try_set_ext_ctrls(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
do {
/* Check if the auto control is part of the
list, and remember the new value. */
- if (helpers[tmp_idx].ctrl == master)
+ if (helpers[tmp_idx].ref->ctrl == master)
new_auto_val = cs->controls[tmp_idx].value;
tmp_idx = helpers[tmp_idx].next;
} while (tmp_idx);
@@ -3262,7 +3262,7 @@ static int try_set_ext_ctrls(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
/* Copy the new caller-supplied control values.
user_to_new() sets 'is_new' to 1. */
do {
- struct v4l2_ctrl *ctrl = helpers[idx].ctrl;
+ struct v4l2_ctrl *ctrl = helpers[idx].ref->ctrl;

ret = user_to_new(cs->controls + idx, ctrl);
if (!ret && ctrl->is_ptr)
@@ -3278,7 +3278,7 @@ static int try_set_ext_ctrls(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
idx = i;
do {
ret = new_to_user(cs->controls + idx,
- helpers[idx].ctrl);
+ helpers[idx].ref->ctrl);
idx = helpers[idx].next;
} while (!ret && idx);
}
--
2.16.0.rc1.238.g530d649a79-goog
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