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drm: remove the dma_ioctl special-case 

We might as well have a real ioctl function which checks for the
callbacks. This seems to be a remnant from back in the days when each
drm driver had their own complete ioctl table, with no shared core
drm table at all.

To make really sure no mis-guided user in a kms driver pops up again
explicitly check for that in the new ioctl implementation.

v2: Drop the unused variable I've accidentally left in the code,
spotted by David Herrmann.

Cc: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Daniel Vetter 2013-08-08 15:41:29 +02:00 committed by Dave Airlie
parent 2ba5f7d538
commit 6eb9278ada
3 changed files with 15 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
drivers/gpu/drm/drm_bufs.c
View File

@ -1455,6 +1455,18 @@ int drm_mapbufs(struct drm_device *dev, void *data,
return retcode;
}
int drm_dma_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
if (drm_core_check_feature(dev, DRIVER_MODESET))
return -EINVAL;
if (dev->driver->dma_ioctl)
return dev->driver->dma_ioctl(dev, data, file_priv);
else
return -EINVAL;
}
struct drm_local_map *drm_getsarea(struct drm_device *dev)
{
struct drm_map_list *entry;

6
drivers/gpu/drm/drm_drv.c
View File

@ -106,8 +106,7 @@ static const struct drm_ioctl_desc drm_ioctls[] = {
DRM_IOCTL_DEF(DRM_IOCTL_INFO_BUFS, drm_infobufs, DRM_AUTH),
DRM_IOCTL_DEF(DRM_IOCTL_MAP_BUFS, drm_mapbufs, DRM_AUTH),
DRM_IOCTL_DEF(DRM_IOCTL_FREE_BUFS, drm_freebufs, DRM_AUTH),
/* The DRM_IOCTL_DMA ioctl should be defined by the driver. */
DRM_IOCTL_DEF(DRM_IOCTL_DMA, NULL, DRM_AUTH),
DRM_IOCTL_DEF(DRM_IOCTL_DMA, drm_dma_ioctl, DRM_AUTH),
DRM_IOCTL_DEF(DRM_IOCTL_CONTROL, drm_control, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
@ -397,9 +396,6 @@ long drm_ioctl(struct file *filp,
/* Do not trust userspace, use our own definition */
func = ioctl->func;
/* is there a local override? */
if ((nr == DRM_IOCTL_NR(DRM_IOCTL_DMA)) && dev->driver->dma_ioctl)
func = dev->driver->dma_ioctl;
if (!func) {
DRM_DEBUG("no function\n");

2
include/drm/drmP.h
View File

@ -1355,6 +1355,8 @@ extern int drm_freebufs(struct drm_device *dev, void *data,
struct drm_file *file_priv);
extern int drm_mapbufs(struct drm_device *dev, void *data,
struct drm_file *file_priv);
extern int drm_dma_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv);
/* DMA support (drm_dma.h) */
extern int drm_legacy_dma_setup(struct drm_device *dev);