drm: Simplify core vs. drv ioctl handling

Now that cmd_drv is gone the handling for core and driver ioctls is
mostly identical, so eliminate the duplication. Also take the
opportunity to simplify the range checks to be less cluttered.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/drm_ioctl.c b/drivers/gpu/drm/drm_ioctl.c
index fc0cf4a840119bfba7e96a443d823e93f2f197dd..68ba014886c2039500c2045df609c98641a658c5 100644 (file)
--- a/drivers/gpu/drm/drm_ioctl.c
+++ b/drivers/gpu/drm/drm_ioctl.c
@@ -663,39 +663,30 @@ long drm_ioctl(struct file *filp,
        int retcode = -EINVAL;
        char stack_kdata[128];
        char *kdata = NULL;
-       unsigned int usize, asize;
+       unsigned int usize, asize, drv_size;
 
        dev = file_priv->minor->dev;
 
        if (drm_device_is_unplugged(dev))
                return -ENODEV;
 
-       if ((nr >= DRM_CORE_IOCTL_COUNT) &&
-           ((nr < DRM_COMMAND_BASE) || (nr >= DRM_COMMAND_END)))
-               goto err_i1;
-       if ((nr >= DRM_COMMAND_BASE) && (nr < DRM_COMMAND_END) &&
-           (nr < DRM_COMMAND_BASE + dev->driver->num_ioctls)) {
-               u32 drv_size;
+       if (nr >= DRM_COMMAND_BASE && nr < DRM_COMMAND_END) {
+               /* driver ioctl */
+               if (nr - DRM_COMMAND_BASE >= dev->driver->num_ioctls)
+                       goto err_i1;
                ioctl = &dev->driver->ioctls[nr - DRM_COMMAND_BASE];
-               drv_size = _IOC_SIZE(ioctl->cmd);
-               usize = asize = _IOC_SIZE(cmd);
-               if (drv_size > asize)
-                       asize = drv_size;
-               cmd = ioctl->cmd;
-       }
-       else if ((nr >= DRM_COMMAND_END) || (nr < DRM_COMMAND_BASE)) {
-               u32 drv_size;
-
+       } else {
+               /* core ioctl */
+               if (nr >= DRM_CORE_IOCTL_COUNT)
+                       goto err_i1;
                ioctl = &drm_ioctls[nr];
+       }
 
-               drv_size = _IOC_SIZE(ioctl->cmd);
-               usize = asize = _IOC_SIZE(cmd);
-               if (drv_size > asize)
-                       asize = drv_size;
-
-               cmd = ioctl->cmd;
-       } else
-               goto err_i1;
+       drv_size = _IOC_SIZE(ioctl->cmd);
+       usize = asize = _IOC_SIZE(cmd);
+       if (drv_size > asize)
+               asize = drv_size;
+       cmd = ioctl->cmd;
 
        DRM_DEBUG("pid=%d, dev=0x%lx, auth=%d, %s\n",
                  task_pid_nr(current),