NVMe: Fix for BLK_DEV_INTEGRITY not set

Need to define and use appropriate functions for when BLK_DEV_INTEGRITY
is not set.

Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Jens Axboe <axboe@fb.com>

diff --git a/drivers/block/nvme-core.c b/drivers/block/nvme-core.c
index b64bccb..ceb32dd 100644 (file)
--- a/drivers/block/nvme-core.c
+++ b/drivers/block/nvme-core.c
@@ -482,6 +482,7 @@ static int nvme_error_status(u16 status)
        }
 }
 
+#ifdef CONFIG_BLK_DEV_INTEGRITY
 static void nvme_dif_prep(u32 p, u32 v, struct t10_pi_tuple *pi)
 {
        if (be32_to_cpu(pi->ref_tag) == v)
@@ -538,6 +539,58 @@ 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 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;
+
+       switch (ns->pi_type) {
+       case NVME_NS_DPS_PI_TYPE3:
+               integrity = t10_pi_type3_crc;
+               break;
+       case NVME_NS_DPS_PI_TYPE1:
+       case NVME_NS_DPS_PI_TYPE2:
+               integrity = t10_pi_type1_crc;
+               break;
+       default:
+               integrity = nvme_meta_noop;
+               break;
+       }
+       integrity.tuple_size = ns->ms;
+       blk_integrity_register(ns->disk, &integrity);
+       blk_queue_max_integrity_segments(ns->queue, 1);
+}
+#else /* CONFIG_BLK_DEV_INTEGRITY */
+static void nvme_dif_remap(struct request *req,
+                       void (*dif_swap)(u32 p, u32 v, struct t10_pi_tuple *pi))
+{
+}
+static void nvme_dif_prep(u32 p, u32 v, struct t10_pi_tuple *pi)
+{
+}
+static void nvme_dif_complete(u32 p, u32 v, struct t10_pi_tuple *pi)
+{
+}
+static void nvme_init_integrity(struct nvme_ns *ns)
+{
+}
+#endif
+
 static void req_completion(struct nvme_queue *nvmeq, void *ctx,
                                                struct nvme_completion *cqe)
 {
@@ -1959,43 +2012,6 @@ static void nvme_config_discard(struct nvme_ns *ns)
        queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, ns->queue);
 }
 
-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 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;
-
-       switch (ns->pi_type) {
-       case NVME_NS_DPS_PI_TYPE3:
-               integrity = t10_pi_type3_crc;
-               break;
-       case NVME_NS_DPS_PI_TYPE1:
-       case NVME_NS_DPS_PI_TYPE2:
-               integrity = t10_pi_type1_crc;
-               break;
-       default:
-               integrity = nvme_meta_noop;
-               break;
-       }
-       integrity.tuple_size = ns->ms;
-       blk_integrity_register(ns->disk, &integrity);
-       blk_queue_max_integrity_segments(ns->queue, 1);
-}
-
 static int nvme_revalidate_disk(struct gendisk *disk)
 {
        struct nvme_ns *ns = disk->private_data;
@@ -2036,7 +2052,8 @@ static int nvme_revalidate_disk(struct gendisk *disk)
        pi_type = ns->ms == sizeof(struct t10_pi_tuple) ?
                                        id->dps & NVME_NS_DPS_PI_MASK : 0;
 
-       if (disk->integrity && (ns->pi_type != pi_type || ns->ms != old_ms ||
+       if (blk_get_integrity(disk) && (ns->pi_type != pi_type ||
+                               ns->ms != old_ms ||
                                bs != queue_logical_block_size(disk->queue) ||
                                (ns->ms && id->flbas & NVME_NS_FLBAS_META_EXT)))
                blk_integrity_unregister(disk);
@@ -2044,11 +2061,11 @@ static int nvme_revalidate_disk(struct gendisk *disk)
        ns->pi_type = pi_type;
        blk_queue_logical_block_size(ns->queue, bs);
 
-       if (ns->ms && !disk->integrity && (disk->flags & GENHD_FL_UP) &&
+       if (ns->ms && !blk_get_integrity(disk) && (disk->flags & GENHD_FL_UP) &&
                                !(id->flbas & NVME_NS_FLBAS_META_EXT))
                nvme_init_integrity(ns);
 
-       if (id->ncap == 0 || (ns->ms && !disk->integrity))
+       if (id->ncap == 0 || (ns->ms && !blk_get_integrity(disk)))
                set_capacity(disk, 0);
        else
                set_capacity(disk, le64_to_cpup(&id->nsze) << (ns->lba_shift - 9));
@@ -2652,7 +2669,7 @@ static void nvme_dev_remove(struct nvme_dev *dev)
 
        list_for_each_entry(ns, &dev->namespaces, list) {
                if (ns->disk->flags & GENHD_FL_UP) {
-                       if (ns->disk->integrity)
+                       if (blk_get_integrity(ns->disk))
                                blk_integrity_unregister(ns->disk);
                        del_gendisk(ns->disk);
                }