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authorDan Williams <dan.j.williams@intel.com>2015-10-21 19:20:29 +0200
committerJens Axboe <axboe@fb.com>2015-10-21 22:43:45 +0200
commit4125a09b0a0d579ebace17f0e62b03ab9d5ab2f4 (patch)
treed2e073b3985850b1ea2a8e7ba9a414a6427f463f /drivers/nvme/host
parentblock: blk_flush_integrity() for bio-based drivers (diff)
downloadlinux-4125a09b0a0d579ebace17f0e62b03ab9d5ab2f4.tar.xz
linux-4125a09b0a0d579ebace17f0e62b03ab9d5ab2f4.zip
block, libnvdimm, nvme: provide a built-in blk_integrity nop profile
The libnvidmm-btt and nvme drivers use blk_integrity to reserve space for per-sector metadata, but sometimes without protection checksums. This property is generically useful, so teach the block core to internally specify a nop profile if one is not provided at registration time. Cc: Keith Busch <keith.busch@intel.com> Cc: Matthew Wilcox <willy@linux.intel.com> Suggested-by: Christoph Hellwig <hch@lst.de> [hch: kill the local nvme nop profile as well] Acked-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'drivers/nvme/host')
-rw-r--r--drivers/nvme/host/pci.c18
1 files changed, 1 insertions, 17 deletions
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index 2fa28680ad0f..9bea542afc4f 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -548,22 +548,6 @@ static void nvme_dif_remap(struct request *req,
kunmap_atomic(pmap);
}
-static int nvme_noop_verify(struct blk_integrity_iter *iter)
-{
- return 0;
-}
-
-static int nvme_noop_generate(struct blk_integrity_iter *iter)
-{
- return 0;
-}
-
-struct blk_integrity_profile nvme_meta_noop = {
- .name = "NVME_META_NOOP",
- .generate_fn = nvme_noop_generate,
- .verify_fn = nvme_noop_verify,
-};
-
static void nvme_init_integrity(struct nvme_ns *ns)
{
struct blk_integrity integrity;
@@ -577,7 +561,7 @@ static void nvme_init_integrity(struct nvme_ns *ns)
integrity.profile = &t10_pi_type1_crc;
break;
default:
- integrity.profile = &nvme_meta_noop;
+ integrity.profile = NULL;
break;
}
integrity.tuple_size = ns->ms;