[PATCH v13 1/4] RDMA/umem: Support importing dma-buf as user memory region

[Jason Gunthorpe]

On Tue, Dec 08, 2020 at 06:13:20PM +0000, Xiong, Jianxin wrote:

> > > +static inline struct ib_umem *ib_umem_dmabuf_get(struct ib_device *device,
> > > +						 unsigned long offset,
> > > +						 size_t size, int fd,
> > > +						 int access,
> > > +						 struct dma_buf_attach_ops *ops) {
> > > +	return ERR_PTR(-EINVAL);
> > 
> > Probably, It should be EOPNOTSUPP and not EINVAL.
> 
> EINVAL is used here to be consistent with existing definitions in the same file.

They may be wrong, EOPNOTSUPP is right for this situation

Jason