[PATCH 04/11] nvme: remove the unused dma_addr_t arguments to nvme_{get, set}_features

[Christoph Hellwig]

On Fri, May 08, 2015 at 03:03:51PM -0400, Matthew Wilcox wrote:
> >  int nvme_get_features(struct nvme_dev *dev, unsigned fid, unsigned nsid,
> > -					dma_addr_t dma_addr, u32 *result)
> > +		u32 *result)
> >  {
> >  	struct nvme_command c;
> >  
> >  	memset(&c, 0, sizeof(c));
> >  	c.features.opcode = nvme_admin_get_features;
> >  	c.features.nsid = cpu_to_le32(nsid);
> > -	c.features.prp1 = cpu_to_le64(dma_addr);
> >  	c.features.fid = cpu_to_le32(fid);
> >  
> >  	return __nvme_submit_sync_cmd(dev->admin_q, &c, result, 0);
> 
> Wait, what?  The PRP1 field is used for LBA Range Type and Autonomous
> Power State Transitions.

None of which is, or ever was issued by the Linux driver.