[PATCH v2] block: nvme: fix the NULL ptr bug in bio_integrity_verify_fn

[Christoph Hellwig]

On Tue, Sep 14, 2021 at 06:15:19AM +0000, koulihong wrote:
> If we move the the conditional judgment to blk_integrity_unregister, we should do some
> cleanup work in md and nvme modules.  I will
> send the v3 patches two weeks later. I’m on a
> holiday, I have tow weeks off.

If you're fine with it I'll take over the series so that we can get
it queued up.