[PATCH] nvme-pci: use standard block status symbolic names to check return value

[Christoph Hellwig]

On Wed, Jul 08, 2020 at 10:18:01AM +0800, Baolin Wang wrote:
> It's better to use the same symbol as the return to check return value,
> and will always work in the unlikely event that the defines are reordered.
> 
> Suggested-by: Keith Busch <kbusch at kernel.org>
> Signed-off-by: Baolin Wang <baolin.wang at linux.alibaba.com>

I'm really not sure this is worth it.  When designing the blk_status_t
type keeping 0 as was a deliberate design decision.