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path: root/drivers/media/video/uvc/uvc_ctrl.c
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Diffstat (limited to 'drivers/media/video/uvc/uvc_ctrl.c')
-rw-r--r--drivers/media/video/uvc/uvc_ctrl.c33
1 files changed, 21 insertions, 12 deletions
diff --git a/drivers/media/video/uvc/uvc_ctrl.c b/drivers/media/video/uvc/uvc_ctrl.c
index 626f4ad7e87..6ef3e5297de 100644
--- a/drivers/media/video/uvc/uvc_ctrl.c
+++ b/drivers/media/video/uvc/uvc_ctrl.c
@@ -585,13 +585,17 @@ int uvc_query_v4l2_ctrl(struct uvc_video_device *video,
struct uvc_control_mapping *mapping;
struct uvc_menu_info *menu;
unsigned int i;
- __u8 data[8];
+ __u8 *data;
int ret;
ctrl = uvc_find_control(video, v4l2_ctrl->id, &mapping);
if (ctrl == NULL)
return -EINVAL;
+ data = kmalloc(8, GFP_KERNEL);
+ if (data == NULL)
+ return -ENOMEM;
+
memset(v4l2_ctrl, 0, sizeof *v4l2_ctrl);
v4l2_ctrl->id = mapping->id;
v4l2_ctrl->type = mapping->v4l2_type;
@@ -604,8 +608,8 @@ int uvc_query_v4l2_ctrl(struct uvc_video_device *video,
if (ctrl->info->flags & UVC_CONTROL_GET_DEF) {
if ((ret = uvc_query_ctrl(video->dev, GET_DEF, ctrl->entity->id,
video->dev->intfnum, ctrl->info->selector,
- &data, ctrl->info->size)) < 0)
- return ret;
+ data, ctrl->info->size)) < 0)
+ goto out;
v4l2_ctrl->default_value = uvc_get_le_value(data, mapping);
}
@@ -623,13 +627,15 @@ int uvc_query_v4l2_ctrl(struct uvc_video_device *video,
}
}
- return 0;
+ ret = 0;
+ goto out;
case V4L2_CTRL_TYPE_BOOLEAN:
v4l2_ctrl->minimum = 0;
v4l2_ctrl->maximum = 1;
v4l2_ctrl->step = 1;
- return 0;
+ ret = 0;
+ goto out;
default:
break;
@@ -638,26 +644,29 @@ int uvc_query_v4l2_ctrl(struct uvc_video_device *video,
if (ctrl->info->flags & UVC_CONTROL_GET_MIN) {
if ((ret = uvc_query_ctrl(video->dev, GET_MIN, ctrl->entity->id,
video->dev->intfnum, ctrl->info->selector,
- &data, ctrl->info->size)) < 0)
- return ret;
+ data, ctrl->info->size)) < 0)
+ goto out;
v4l2_ctrl->minimum = uvc_get_le_value(data, mapping);
}
if (ctrl->info->flags & UVC_CONTROL_GET_MAX) {
if ((ret = uvc_query_ctrl(video->dev, GET_MAX, ctrl->entity->id,
video->dev->intfnum, ctrl->info->selector,
- &data, ctrl->info->size)) < 0)
- return ret;
+ data, ctrl->info->size)) < 0)
+ goto out;
v4l2_ctrl->maximum = uvc_get_le_value(data, mapping);
}
if (ctrl->info->flags & UVC_CONTROL_GET_RES) {
if ((ret = uvc_query_ctrl(video->dev, GET_RES, ctrl->entity->id,
video->dev->intfnum, ctrl->info->selector,
- &data, ctrl->info->size)) < 0)
- return ret;
+ data, ctrl->info->size)) < 0)
+ goto out;
v4l2_ctrl->step = uvc_get_le_value(data, mapping);
}
- return 0;
+ ret = 0;
+out:
+ kfree(data);
+ return ret;
}