On Wed, Sep 28, 2022 at 07:19:32PM +0200, Christoph Hellwig wrote:
> > +	if (!vec)
> > +		ret = blk_rq_map_user(q, req, NULL, ubuffer, bufflen,
> > +			GFP_KERNEL);
> > +	else {
> > +		struct iovec fast_iov[UIO_FASTIOV];
> > +		struct iovec *iov = fast_iov;
> > +		struct iov_iter iter;
> > +
> > +		ret = import_iovec(rq_data_dir(req), ubuffer, bufflen,
> > +				UIO_FASTIOV, &iov, &iter);
> > +		if (ret < 0)
> >  			goto out;
> > +
> > +		ret = blk_rq_map_user_iov(q, req, NULL, &iter, GFP_KERNEL);
> > +		kfree(iov);
> > +	}
> 
> As mentioned before this is something that should got into blk-map.c
> as a separate helper, and scsi_ioctl.c and sg.c should be switched to
> use it as well.
> 

sure, this will be done in the next iteration
> Otherwise this looks good.

--
Anuj Gupta

>