Michel DÃnzer wrote:
How do you "know" the owner ? I'm not sure the pid would be enough.+ DRM_COPY_FROM_USER_IOCTL( memfree, (drm_radeon_mem_free_t __user *)data,
+ sizeof(memfree) );
+
+ dev_priv->surfaces&= (~(1<<memfree.surface));
It should definitely ensure that only the owner can free a surface though. It would also need to free a client's surfaces if it dies, etc.
The same way everything else in the DRM does: using the caller's file pointer (filp).
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