[PATCH V1] nvme-pci: Fix NULL pointer dereference in nvme_pci_prp_iter_next

[Keith Busch]

On Tue, Feb 03, 2026 at 06:27:56AM +0100, Christoph Hellwig wrote:
> >  	iod->nr_descriptors = 0;
> >  	iod->total_len = 0;
> >  	iod->meta_total_len = 0;
> > +	iod->nr_dma_vecs = 0;
> > +	iod->dma_vecs = NULL;
> 
> I don't think we need the dma_vecs initialization here, as everything
> is keyed off nr_dma_vecs.

Yes, we should definitely use nr_dma_vecs and skip the NULL setting. I'm
a big fan removing unnecessary initialisations. Just a caution, my
suggested patch has this check:

	if (!iod->dma_vecs)

So we just need to update it to use 'iod->nr_dma_vecs' instead, which
would have been correct, too.