diff options
Diffstat (limited to 'drivers/nvdimm')
| -rw-r--r-- | drivers/nvdimm/label.c | 136 | ||||
| -rw-r--r-- | drivers/nvdimm/namespace_devs.c | 173 | ||||
| -rw-r--r-- | drivers/nvdimm/nd-core.h | 1 | ||||
| -rw-r--r-- | drivers/nvdimm/nd.h | 16 | ||||
| -rw-r--r-- | drivers/nvdimm/region_devs.c | 19 |
5 files changed, 225 insertions, 120 deletions
diff --git a/drivers/nvdimm/label.c b/drivers/nvdimm/label.c index 96526dcfdd37..c37357210428 100644 --- a/drivers/nvdimm/label.c +++ b/drivers/nvdimm/label.c @@ -499,6 +499,7 @@ static int __pmem_label_update(struct nd_region *nd_region, struct nd_namespace_label *victim_label; struct nd_namespace_label *nd_label; struct nd_namespace_index *nsindex; + struct nd_label_ent *label_ent; unsigned long *free; u32 nslot, slot; size_t offset; @@ -536,8 +537,13 @@ static int __pmem_label_update(struct nd_region *nd_region, return rc; /* Garbage collect the previous label */ - victim_label = nd_mapping->labels[0]; + mutex_lock(&nd_mapping->lock); + label_ent = list_first_entry_or_null(&nd_mapping->labels, + typeof(*label_ent), list); + WARN_ON(!label_ent); + victim_label = label_ent ? label_ent->label : NULL; if (victim_label) { + label_ent->label = NULL; slot = to_slot(ndd, victim_label); nd_label_free_slot(ndd, slot); dev_dbg(ndd->dev, "%s: free: %d\n", __func__, slot); @@ -546,28 +552,11 @@ static int __pmem_label_update(struct nd_region *nd_region, /* update index */ rc = nd_label_write_index(ndd, ndd->ns_next, nd_inc_seq(__le32_to_cpu(nsindex->seq)), 0); - if (rc < 0) - return rc; - - nd_mapping->labels[0] = nd_label; - - return 0; -} - -static void del_label(struct nd_mapping *nd_mapping, int l) -{ - struct nd_namespace_label *next_label, *nd_label; - struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); - unsigned int slot; - int j; + if (rc == 0 && label_ent) + label_ent->label = nd_label; + mutex_unlock(&nd_mapping->lock); - nd_label = nd_mapping->labels[l]; - slot = to_slot(ndd, nd_label); - dev_vdbg(ndd->dev, "%s: clear: %d\n", __func__, slot); - - for (j = l; (next_label = nd_mapping->labels[j + 1]); j++) - nd_mapping->labels[j] = next_label; - nd_mapping->labels[j] = NULL; + return rc; } static bool is_old_resource(struct resource *res, struct resource **list, int n) @@ -607,14 +596,16 @@ static int __blk_label_update(struct nd_region *nd_region, struct nd_mapping *nd_mapping, struct nd_namespace_blk *nsblk, int num_labels) { - int i, l, alloc, victims, nfree, old_num_resources, nlabel, rc = -ENXIO; + int i, alloc, victims, nfree, old_num_resources, nlabel, rc = -ENXIO; struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); struct nd_namespace_label *nd_label; + struct nd_label_ent *label_ent, *e; struct nd_namespace_index *nsindex; unsigned long *free, *victim_map = NULL; struct resource *res, **old_res_list; struct nd_label_id label_id; u8 uuid[NSLABEL_UUID_LEN]; + LIST_HEAD(list); u32 nslot, slot; if (!preamble_next(ndd, &nsindex, &free, &nslot)) @@ -736,15 +727,22 @@ static int __blk_label_update(struct nd_region *nd_region, * entries in nd_mapping->labels */ nlabel = 0; - for_each_label(l, nd_label, nd_mapping->labels) { + mutex_lock(&nd_mapping->lock); + list_for_each_entry_safe(label_ent, e, &nd_mapping->labels, list) { + nd_label = label_ent->label; + if (!nd_label) + continue; nlabel++; memcpy(uuid, nd_label->uuid, NSLABEL_UUID_LEN); if (memcmp(uuid, nsblk->uuid, NSLABEL_UUID_LEN) != 0) continue; nlabel--; - del_label(nd_mapping, l); - l--; /* retry with the new label at this index */ + list_move(&label_ent->list, &list); + label_ent->label = NULL; } + list_splice_tail_init(&list, &nd_mapping->labels); + mutex_unlock(&nd_mapping->lock); + if (nlabel + nsblk->num_resources > num_labels) { /* * Bug, we can't end up with more resources than @@ -755,6 +753,15 @@ static int __blk_label_update(struct nd_region *nd_region, goto out; } + mutex_lock(&nd_mapping->lock); + label_ent = list_first_entry_or_null(&nd_mapping->labels, + typeof(*label_ent), list); + if (!label_ent) { + WARN_ON(1); + mutex_unlock(&nd_mapping->lock); + rc = -ENXIO; + goto out; + } for_each_clear_bit_le(slot, free, nslot) { nd_label = nd_label_base(ndd) + slot; memcpy(uuid, nd_label->uuid, NSLABEL_UUID_LEN); @@ -762,11 +769,19 @@ static int __blk_label_update(struct nd_region *nd_region, continue; res = to_resource(ndd, nd_label); res->flags &= ~DPA_RESOURCE_ADJUSTED; - dev_vdbg(&nsblk->common.dev, "assign label[%d] slot: %d\n", - l, slot); - nd_mapping->labels[l++] = nd_label; + dev_vdbg(&nsblk->common.dev, "assign label slot: %d\n", slot); + list_for_each_entry_from(label_ent, &nd_mapping->labels, list) { + if (label_ent->label) + continue; + label_ent->label = nd_label; + nd_label = NULL; + break; + } + if (nd_label) + dev_WARN(&nsblk->common.dev, + "failed to track label slot%d\n", slot); } - nd_mapping->labels[l] = NULL; + mutex_unlock(&nd_mapping->lock); out: kfree(old_res_list); @@ -788,32 +803,28 @@ static int __blk_label_update(struct nd_region *nd_region, static int init_labels(struct nd_mapping *nd_mapping, int num_labels) { - int i, l, old_num_labels = 0; + int i, old_num_labels = 0; + struct nd_label_ent *label_ent; struct nd_namespace_index *nsindex; - struct nd_namespace_label *nd_label; struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); - size_t size = (num_labels + 1) * sizeof(struct nd_namespace_label *); - for_each_label(l, nd_label, nd_mapping->labels) + mutex_lock(&nd_mapping->lock); + list_for_each_entry(label_ent, &nd_mapping->labels, list) old_num_labels++; + mutex_unlock(&nd_mapping->lock); /* * We need to preserve all the old labels for the mapping so * they can be garbage collected after writing the new labels. */ - if (num_labels > old_num_labels) { - struct nd_namespace_label **labels; - - labels = krealloc(nd_mapping->labels, size, GFP_KERNEL); - if (!labels) + for (i = old_num_labels; i < num_labels; i++) { + label_ent = kzalloc(sizeof(*label_ent), GFP_KERNEL); + if (!label_ent) return -ENOMEM; - nd_mapping->labels = labels; + mutex_lock(&nd_mapping->lock); + list_add_tail(&label_ent->list, &nd_mapping->labels); + mutex_unlock(&nd_mapping->lock); } - if (!nd_mapping->labels) - return -ENOMEM; - - for (i = old_num_labels; i <= num_labels; i++) - nd_mapping->labels[i] = NULL; if (ndd->ns_current == -1 || ndd->ns_next == -1) /* pass */; @@ -837,42 +848,45 @@ static int init_labels(struct nd_mapping *nd_mapping, int num_labels) static int del_labels(struct nd_mapping *nd_mapping, u8 *uuid) { struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); - struct nd_namespace_label *nd_label; + struct nd_label_ent *label_ent, *e; struct nd_namespace_index *nsindex; u8 label_uuid[NSLABEL_UUID_LEN]; - int l, num_freed = 0; unsigned long *free; + LIST_HEAD(list); u32 nslot, slot; + int active = 0; if (!uuid) return 0; /* no index || no labels == nothing to delete */ - if (!preamble_next(ndd, &nsindex, &free, &nslot) - || !nd_mapping->labels) + if (!preamble_next(ndd, &nsindex, &free, &nslot)) return 0; - for_each_label(l, nd_label, nd_mapping->labels) { + mutex_lock(&nd_mapping->lock); + list_for_each_entry_safe(label_ent, e, &nd_mapping->labels, list) { + struct nd_namespace_label *nd_label = label_ent->label; + + if (!nd_label) + continue; + active++; memcpy(label_uuid, nd_label->uuid, NSLABEL_UUID_LEN); if (memcmp(label_uuid, uuid, NSLABEL_UUID_LEN) != 0) continue; + active--; slot = to_slot(ndd, nd_label); nd_label_free_slot(ndd, slot); dev_dbg(ndd->dev, "%s: free: %d\n", __func__, slot); - del_label(nd_mapping, l); - num_freed++; - l--; /* retry with new label at this index */ + list_move_tail(&label_ent->list, &list); + label_ent->label = NULL; } + list_splice_tail_init(&list, &nd_mapping->labels); - if (num_freed > l) { - /* - * num_freed will only ever be > l when we delete the last - * label - */ - kfree(nd_mapping->labels); - nd_mapping->labels = NULL; - dev_dbg(ndd->dev, "%s: no more labels\n", __func__); + if (active == 0) { + nd_mapping_free_labels(nd_mapping); + dev_dbg(ndd->dev, "%s: no more active labels\n", __func__); } + mutex_unlock(&nd_mapping->lock); return nd_label_write_index(ndd, ndd->ns_next, nd_inc_seq(__le32_to_cpu(nsindex->seq)), 0); diff --git a/drivers/nvdimm/namespace_devs.c b/drivers/nvdimm/namespace_devs.c index 4f0a21308417..9f4188c78120 100644 --- a/drivers/nvdimm/namespace_devs.c +++ b/drivers/nvdimm/namespace_devs.c @@ -14,6 +14,7 @@ #include <linux/device.h> #include <linux/slab.h> #include <linux/pmem.h> +#include <linux/list.h> #include <linux/nd.h> #include "nd-core.h" #include "nd.h" @@ -1089,7 +1090,7 @@ static int namespace_update_uuid(struct nd_region *nd_region, * * FIXME: can we delete uuid with zero dpa allocated? */ - if (nd_mapping->labels) + if (list_empty(&nd_mapping->labels)) return -EBUSY; } @@ -1491,14 +1492,19 @@ static bool has_uuid_at_pos(struct nd_region *nd_region, u8 *uuid, for (i = 0; i < nd_region->ndr_mappings; i++) { struct nd_mapping *nd_mapping = &nd_region->mapping[i]; - struct nd_namespace_label *nd_label; + struct nd_label_ent *label_ent; bool found_uuid = false; - int l; - for_each_label(l, nd_label, nd_mapping->labels) { - u64 isetcookie = __le64_to_cpu(nd_label->isetcookie); - u16 position = __le16_to_cpu(nd_label->position); - u16 nlabel = __le16_to_cpu(nd_label->nlabel); + list_for_each_entry(label_ent, &nd_mapping->labels, list) { + struct nd_namespace_label *nd_label = label_ent->label; + u16 position, nlabel; + u64 isetcookie; + + if (!nd_label) + continue; + isetcookie = __le64_to_cpu(nd_label->isetcookie); + position = __le16_to_cpu(nd_label->position); + nlabel = __le16_to_cpu(nd_label->nlabel); if (isetcookie != cookie) continue; @@ -1528,7 +1534,6 @@ static bool has_uuid_at_pos(struct nd_region *nd_region, u8 *uuid, static int select_pmem_id(struct nd_region *nd_region, u8 *pmem_id) { - struct nd_namespace_label *select = NULL; int i; if (!pmem_id) @@ -1536,35 +1541,47 @@ static int select_pmem_id(struct nd_region *nd_region, u8 *pmem_id) for (i = 0; i < nd_region->ndr_mappings; i++) { struct nd_mapping *nd_mapping = &nd_region->mapping[i]; - struct nd_namespace_label *nd_label; + struct nd_namespace_label *nd_label = NULL; u64 hw_start, hw_end, pmem_start, pmem_end; - int l; + struct nd_label_ent *label_ent; - for_each_label(l, nd_label, nd_mapping->labels) + mutex_lock(&nd_mapping->lock); + list_for_each_entry(label_ent, &nd_mapping->labels, list) { + nd_label = label_ent->label; + if (!nd_label) + continue; if (memcmp(nd_label->uuid, pmem_id, NSLABEL_UUID_LEN) == 0) break; + nd_label = NULL; + } + mutex_unlock(&nd_mapping->lock); if (!nd_label) { WARN_ON(1); return -EINVAL; } - select = nd_label; /* * Check that this label is compliant with the dpa * range published in NFIT */ hw_start = nd_mapping->start; hw_end = hw_start + nd_mapping->size; - pmem_start = __le64_to_cpu(select->dpa); - pmem_end = pmem_start + __le64_to_cpu(select->rawsize); + pmem_start = __le64_to_cpu(nd_label->dpa); + pmem_end = pmem_start + __le64_to_cpu(nd_label->rawsize); if (pmem_start == hw_start && pmem_end <= hw_end) /* pass */; else return -EINVAL; - nd_mapping->labels[0] = select; - nd_mapping->labels[1] = NULL; + mutex_lock(&nd_mapping->lock); + label_ent = list_first_entry(&nd_mapping->labels, + typeof(*label_ent), list); + label_ent->label = nd_label; + list_del(&label_ent->list); + nd_mapping_free_labels(nd_mapping); + list_add(&label_ent->list, &nd_mapping->labels); + mutex_unlock(&nd_mapping->lock); } return 0; } @@ -1577,11 +1594,12 @@ static int find_pmem_label_set(struct nd_region *nd_region, struct nd_namespace_pmem *nspm) { u64 cookie = nd_region_interleave_set_cookie(nd_region); - struct nd_namespace_label *nd_label; u8 select_id[NSLABEL_UUID_LEN]; + struct nd_label_ent *label_ent; + struct nd_mapping *nd_mapping; resource_size_t size = 0; u8 *pmem_id = NULL; - int rc = -ENODEV, l; + int rc = 0; u16 i; if (cookie == 0) { @@ -1593,13 +1611,19 @@ static int find_pmem_label_set(struct nd_region *nd_region, * Find a complete set of labels by uuid. By definition we can start * with any mapping as the reference label */ - for_each_label(l, nd_label, nd_region->mapping[0].labels) { - u64 isetcookie = __le64_to_cpu(nd_label->isetcookie); + for (i = 0; i < nd_region->ndr_mappings; i++) { + nd_mapping = &nd_region->mapping[i]; + mutex_lock_nested(&nd_mapping->lock, i); + } + list_for_each_entry(label_ent, &nd_region->mapping[0].labels, list) { + struct nd_namespace_label *nd_label = label_ent->label; - if (isetcookie != cookie) + if (!nd_label) + continue; + if (__le64_to_cpu(nd_label->isetcookie) != cookie) continue; - for (i = 0; nd_region->ndr_mappings; i++) + for (i = 0; i < nd_region->ndr_mappings; i++) if (!has_uuid_at_pos(nd_region, nd_label->uuid, cookie, i)) break; @@ -1611,18 +1635,27 @@ static int find_pmem_label_set(struct nd_region *nd_region, * dimm with two instances of the same uuid. */ rc = -EINVAL; - goto err; + break; } else if (pmem_id) { /* * If there is more than one valid uuid set, we * need userspace to clean this up. */ rc = -EBUSY; - goto err; + break; } memcpy(select_id, nd_label->uuid, NSLABEL_UUID_LEN); pmem_id = select_id; } + for (i = 0; i < nd_region->ndr_mappings; i++) { + int reverse = nd_region->ndr_mappings - 1 - i; + + nd_mapping = &nd_region->mapping[reverse]; + mutex_unlock(&nd_mapping->lock); + } + + if (rc) + goto err; /* * Fix up each mapping's 'labels' to have the validated pmem label for @@ -1638,8 +1671,19 @@ static int find_pmem_label_set(struct nd_region *nd_region, /* Calculate total size and populate namespace properties from label0 */ for (i = 0; i < nd_region->ndr_mappings; i++) { - struct nd_mapping *nd_mapping = &nd_region->mapping[i]; - struct nd_namespace_label *label0 = nd_mapping->labels[0]; + struct nd_namespace_label *label0; + + nd_mapping = &nd_region->mapping[i]; + mutex_lock(&nd_mapping->lock); + label_ent = list_first_entry_or_null(&nd_mapping->labels, + typeof(*label_ent), list); + label0 = label_ent ? label_ent->label : 0; + mutex_unlock(&nd_mapping->lock); + + if (!label0) { + WARN_ON(1); + continue; + } size += __le64_to_cpu(label0->rawsize); if (__le16_to_cpu(label0->position) != 0) @@ -1700,8 +1744,9 @@ static struct device **create_namespace_pmem(struct nd_region *nd_region) for (i = 0; i < nd_region->ndr_mappings; i++) { struct nd_mapping *nd_mapping = &nd_region->mapping[i]; - kfree(nd_mapping->labels); - nd_mapping->labels = NULL; + mutex_lock(&nd_mapping->lock); + nd_mapping_free_labels(nd_mapping); + mutex_unlock(&nd_mapping->lock); } /* Publish a zero-sized namespace for userspace to configure. */ @@ -1822,25 +1867,25 @@ void nd_region_create_btt_seed(struct nd_region *nd_region) dev_err(&nd_region->dev, "failed to create btt namespace\n"); } -static struct device **create_namespace_blk(struct nd_region *nd_region) +static struct device **scan_labels(struct nd_region *nd_region, + struct nd_mapping *nd_mapping) { - struct nd_mapping *nd_mapping = &nd_region->mapping[0]; - struct nd_namespace_label *nd_label; + struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); struct device *dev, **devs = NULL; struct nd_namespace_blk *nsblk; - struct nvdimm_drvdata *ndd; - int i, l, count = 0; - struct resource *res; - - if (nd_region->ndr_mappings == 0) - return NULL; + struct nd_label_ent *label_ent; + int i, count = 0; - ndd = to_ndd(nd_mapping); - for_each_label(l, nd_label, nd_mapping->labels) { - u32 flags = __le32_to_cpu(nd_label->flags); + list_for_each_entry(label_ent, &nd_mapping->labels, list) { + struct nd_namespace_label *nd_label = label_ent->label; char *name[NSLABEL_NAME_LEN]; struct device **__devs; + struct resource *res; + u32 flags; + if (!nd_label) + continue; + flags = __le32_to_cpu(nd_label->flags); if (flags & NSLABEL_FLAG_LOCAL) /* pass */; else @@ -1899,12 +1944,7 @@ static struct device **create_namespace_blk(struct nd_region *nd_region) if (count == 0) { /* Publish a zero-sized namespace for userspace to configure. */ - for (i = 0; i < nd_region->ndr_mappings; i++) { - struct nd_mapping *nd_mapping = &nd_region->mapping[i]; - - kfree(nd_mapping->labels); - nd_mapping->labels = NULL; - } + nd_mapping_free_labels(nd_mapping); devs = kcalloc(2, sizeof(dev), GFP_KERNEL); if (!devs) @@ -1920,8 +1960,8 @@ static struct device **create_namespace_blk(struct nd_region *nd_region) return devs; -err: - for (i = 0; i < count; i++) { + err: + for (i = 0; devs[i]; i++) { nsblk = to_nd_namespace_blk(devs[i]); namespace_blk_release(&nsblk->common.dev); } @@ -1929,6 +1969,21 @@ err: return NULL; } +static struct device **create_namespace_blk(struct nd_region *nd_region) +{ + struct nd_mapping *nd_mapping = &nd_region->mapping[0]; + struct device **devs; + + if (nd_region->ndr_mappings == 0) + return NULL; + + mutex_lock(&nd_mapping->lock); + devs = scan_labels(nd_region, nd_mapping); + mutex_unlock(&nd_mapping->lock); + + return devs; +} + static int init_active_labels(struct nd_region *nd_region) { int i; @@ -1937,6 +1992,7 @@ static int init_active_labels(struct nd_region *nd_region) struct nd_mapping *nd_mapping = &nd_region->mapping[i]; struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); struct nvdimm *nvdimm = nd_mapping->nvdimm; + struct nd_label_ent *label_ent; int count, j; /* @@ -1958,16 +2014,27 @@ static int init_active_labels(struct nd_region *nd_region) dev_dbg(ndd->dev, "%s: %d\n", __func__, count); if (!count) continue; - nd_mapping->labels = kcalloc(count + 1, sizeof(void *), - GFP_KERNEL); - if (!nd_mapping->labels) - return -ENOMEM; for (j = 0; j < count; j++) { struct nd_namespace_label *label; + label_ent = kzalloc(sizeof(*label_ent), GFP_KERNEL); + if (!label_ent) + break; label = nd_label_active(ndd, j); - nd_mapping->labels[j] = label; + label_ent->label = label; + + mutex_lock(&nd_mapping->lock); + list_add_tail(&label_ent->list, &nd_mapping->labels); + mutex_unlock(&nd_mapping->lock); } + + if (j >= count) + continue; + + mutex_lock(&nd_mapping->lock); + nd_mapping_free_labels(nd_mapping); + mutex_unlock(&nd_mapping->lock); + return -ENOMEM; } return 0; diff --git a/drivers/nvdimm/nd-core.h b/drivers/nvdimm/nd-core.h index 1414784c6c2b..fb3ade0d4a83 100644 --- a/drivers/nvdimm/nd-core.h +++ b/drivers/nvdimm/nd-core.h @@ -73,6 +73,7 @@ bool nd_is_uuid_unique(struct device *dev, u8 *uuid); struct nd_region; struct nvdimm_drvdata; struct nd_mapping; +void nd_mapping_free_labels(struct nd_mapping *nd_mapping); resource_size_t nd_pmem_available_dpa(struct nd_region *nd_region, struct nd_mapping *nd_mapping, resource_size_t *overlap); resource_size_t nd_blk_available_dpa(struct nd_mapping *nd_mapping); diff --git a/drivers/nvdimm/nd.h b/drivers/nvdimm/nd.h index e58c40824e1f..f67c61f1a8a4 100644 --- a/drivers/nvdimm/nd.h +++ b/drivers/nvdimm/nd.h @@ -83,9 +83,6 @@ static inline struct nd_namespace_index *to_next_namespace_index( (unsigned long long) (res ? resource_size(res) : 0), \ (unsigned long long) (res ? res->start : 0), ##arg) -#define for_each_label(l, label, labels) \ - for (l = 0; (label = labels ? labels[l] : NULL); l++) - #define for_each_dpa_resource(ndd, res) \ for (res = (ndd)->dpa.child; res; res = res->sibling) @@ -98,11 +95,22 @@ struct nd_percpu_lane { spinlock_t lock; }; +struct nd_label_ent { + struct list_head list; + struct nd_namespace_label *label; +}; + +enum nd_mapping_lock_class { + ND_MAPPING_CLASS0, + ND_MAPPING_UUID_SCAN, +}; + struct nd_mapping { struct nvdimm *nvdimm; - struct nd_namespace_label **labels; u64 start; u64 size; + struct list_head labels; + struct mutex lock; /* * @ndd is for private use at region enable / disable time for * get_ndd() + put_ndd(), all other nd_mapping to ndd diff --git a/drivers/nvdimm/region_devs.c b/drivers/nvdimm/region_devs.c index 0ff43cbb15e3..19bcd68c4141 100644 --- a/drivers/nvdimm/region_devs.c +++ b/drivers/nvdimm/region_devs.c @@ -487,6 +487,17 @@ u64 nd_region_interleave_set_cookie(struct nd_region *nd_region) return 0; } +void nd_mapping_free_labels(struct nd_mapping *nd_mapping) +{ + struct nd_label_ent *label_ent, *e; + + WARN_ON(!mutex_is_locked(&nd_mapping->lock)); + list_for_each_entry_safe(label_ent, e, &nd_mapping->labels, list) { + list_del(&label_ent->list); + kfree(label_ent); + } +} + /* * Upon successful probe/remove, take/release a reference on the * associated interleave set (if present), and plant new btt + namespace @@ -507,8 +518,10 @@ static void nd_region_notify_driver_action(struct nvdimm_bus *nvdimm_bus, struct nvdimm_drvdata *ndd = nd_mapping->ndd; struct nvdimm *nvdimm = nd_mapping->nvdimm; - kfree(nd_mapping->labels); - nd_mapping->labels = NULL; + mutex_lock(&nd_mapping->lock); + nd_mapping_free_labels(nd_mapping); + mutex_unlock(&nd_mapping->lock); + put_ndd(ndd); nd_mapping->ndd = NULL; if (ndd) @@ -816,6 +829,8 @@ static struct nd_region *nd_region_create(struct nvdimm_bus *nvdimm_bus, nd_region->mapping[i].nvdimm = nvdimm; nd_region->mapping[i].start = mapping->start; nd_region->mapping[i].size = mapping->size; + INIT_LIST_HEAD(&nd_region->mapping[i].labels); + mutex_init(&nd_region->mapping[i].lock); get_device(&nvdimm->dev); } |