From 9801b5b28c6929139d6fceeee8d739cc67bb2739 Mon Sep 17 00:00:00 2001 From: Hans Verkuil Date: Wed, 17 Jan 2024 15:52:04 +0100 Subject: [PATCH] media: v4l2-ctrls: show all owned controls in log_status VIDIOC_LOG_STATUS will log the controls owned by the driver. But the code didn't take into account the case where a single driver creates multiple control handlers. A good example is the vivid driver, but others use it as well. Modify v4l2_ctrl_handler_log_status() so that it really shows all controls owned by this driver. Signed-off-by: Hans Verkuil --- drivers/media/v4l2-core/v4l2-ctrls-core.c | 18 +++++++++++++----- 1 file changed, 13 insertions(+), 5 deletions(-) diff --git a/drivers/media/v4l2-core/v4l2-ctrls-core.c b/drivers/media/v4l2-core/v4l2-ctrls-core.c index a662fb60f73f..0accb96001db 100644 --- a/drivers/media/v4l2-core/v4l2-ctrls-core.c +++ b/drivers/media/v4l2-core/v4l2-ctrls-core.c @@ -2503,7 +2503,8 @@ int v4l2_ctrl_handler_setup(struct v4l2_ctrl_handler *hdl) EXPORT_SYMBOL(v4l2_ctrl_handler_setup); /* Log the control name and value */ -static void log_ctrl(const struct v4l2_ctrl *ctrl, +static void log_ctrl(const struct v4l2_ctrl_handler *hdl, + struct v4l2_ctrl *ctrl, const char *prefix, const char *colon) { if (ctrl->flags & (V4L2_CTRL_FLAG_DISABLED | V4L2_CTRL_FLAG_WRITE_ONLY)) @@ -2513,7 +2514,11 @@ static void log_ctrl(const struct v4l2_ctrl *ctrl, pr_info("%s%s%s: ", prefix, colon, ctrl->name); + if (ctrl->handler != hdl) + v4l2_ctrl_lock(ctrl); ctrl->type_ops->log(ctrl); + if (ctrl->handler != hdl) + v4l2_ctrl_unlock(ctrl); if (ctrl->flags & (V4L2_CTRL_FLAG_INACTIVE | V4L2_CTRL_FLAG_GRABBED | @@ -2532,7 +2537,7 @@ static void log_ctrl(const struct v4l2_ctrl *ctrl, void v4l2_ctrl_handler_log_status(struct v4l2_ctrl_handler *hdl, const char *prefix) { - struct v4l2_ctrl *ctrl; + struct v4l2_ctrl_ref *ref; const char *colon = ""; int len; @@ -2544,9 +2549,12 @@ void v4l2_ctrl_handler_log_status(struct v4l2_ctrl_handler *hdl, if (len && prefix[len - 1] != ' ') colon = ": "; mutex_lock(hdl->lock); - list_for_each_entry(ctrl, &hdl->ctrls, node) - if (!(ctrl->flags & V4L2_CTRL_FLAG_DISABLED)) - log_ctrl(ctrl, prefix, colon); + list_for_each_entry(ref, &hdl->ctrl_refs, node) { + if (ref->from_other_dev || + (ref->ctrl->flags & V4L2_CTRL_FLAG_DISABLED)) + continue; + log_ctrl(hdl, ref->ctrl, prefix, colon); + } mutex_unlock(hdl->lock); } EXPORT_SYMBOL(v4l2_ctrl_handler_log_status);