c0f76fc8ad
Use devm_memunmap_pages instead of memunmap_pages to release pgmap and remove pgmap from device action, to avoid double free pgmap when unloading driver module. Release device memory region if failed to create device memory pages structure. Signed-off-by: Philip Yang <Philip.Yang@amd.com> Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>