diff options
| author | Laurent Pinchart <laurent.pinchart@skynet.be> | 2008-07-31 17:11:12 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@infradead.org> | 2008-08-06 06:57:37 -0300 |
| commit | 04793dd041bbb88a39b768b714c725de2c339b51 (patch) | |
| tree | 2d801aeb2d3fe12f86ed493ed9b541ad2873c52b /drivers/media/video/uvc/uvc_ctrl.c | |
| parent | 835f09c6594aa98cbfae05c5466a81fda3081d2c (diff) | |
V4L/DVB (8617): uvcvideo: don't use stack-based buffers for USB transfers.
Data buffers on the stack are not allowed for USB I/O. Use dynamically
allocated buffers instead.
Signed-off-by: Bruce Schmid <duck@freescale.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@skynet.be>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Diffstat (limited to 'drivers/media/video/uvc/uvc_ctrl.c')
| -rw-r--r-- | drivers/media/video/uvc/uvc_ctrl.c | 33 |
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 626f4ad7e876..6ef3e5297de8 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; } |