Closed duagon-hhedwig closed 1 year ago
If the vme4l_core issues a DMA-Transfer to userspace a general protection faultarises due to a wrong flag setup in get_user_pages_fast().
With: rv = get_user_pages_fast( uaddr, nr_pages, direction == DMA_FROM_DEVICE ? FOLL_WRITE : 0, pages);
rv = get_user_pages_fast( uaddr, nr_pages, direction == DMA_FROM_DEVICE ? FOLL_WRITE : 0, pages);
General protection fault doesn't ocurr
If the vme4l_core issues a DMA-Transfer to userspace a general protection faultarises due to a wrong flag setup in get_user_pages_fast().
With:
rv = get_user_pages_fast( uaddr, nr_pages, direction == DMA_FROM_DEVICE ? FOLL_WRITE : 0, pages);General protection fault doesn't ocurr