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nvdimm: Introduce guard() for nvdimm_bus_lock

Browse Source 
Converting nvdimm_bus_lock/unlock to guard() to clean up usage
of gotos for error handling and avoid future mistakes of missed
unlock on error paths.

Link: https://lore.kernel.org/linux-cxl/20250917163623.00004a3c@huawei.com/
Suggested-by: Jonathan Cameron <jonathan.cameron@huawei.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Acked-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
This commit is contained in:
Dave Jiang
2025-09-23 10:40:12 -07:00
committed by Ira Weiny
parent d1a599a813
commit 0020839be0
14 changed files with 195 additions and 252 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/nvdimm/badrange.c
View File

@@ -278,8 +278,7 @@ void nvdimm_badblocks_populate(struct nd_region *nd_region,
}
nvdimm_bus = walk_to_nvdimm_bus(&nd_region->dev);
nvdimm_bus_lock(&nvdimm_bus->dev);
guard(nvdimm_bus)(&nvdimm_bus->dev);
badblocks_populate(&nvdimm_bus->badrange, bb, range);
nvdimm_bus_unlock(&nvdimm_bus->dev);
}
EXPORT_SYMBOL_GPL(nvdimm_badblocks_populate);

24
drivers/nvdimm/btt_devs.c
View File

@@ -50,14 +50,12 @@ static ssize_t sector_size_store(struct device *dev,
struct nd_btt *nd_btt = to_nd_btt(dev);
ssize_t rc;
device_lock(dev);
nvdimm_bus_lock(dev);
guard(device)(dev);
guard(nvdimm_bus)(dev);
rc = nd_size_select_store(dev, buf, &nd_btt->lbasize,
btt_lbasize_supported);
dev_dbg(dev, "result: %zd wrote: %s%s", rc, buf,
buf[len - 1] == '\n' ? "" : "\n");
nvdimm_bus_unlock(dev);
device_unlock(dev);
return rc ? rc : len;
}
@@ -93,13 +91,10 @@ static ssize_t namespace_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct nd_btt *nd_btt = to_nd_btt(dev);
ssize_t rc;
nvdimm_bus_lock(dev);
rc = sprintf(buf, "%s\n", nd_btt->ndns
guard(nvdimm_bus)(dev);
return sprintf(buf, "%s\n", nd_btt->ndns
? dev_name(&nd_btt->ndns->dev) : "");
nvdimm_bus_unlock(dev);
return rc;
}
static ssize_t namespace_store(struct device *dev,
@@ -108,13 +103,11 @@ static ssize_t namespace_store(struct device *dev,
struct nd_btt *nd_btt = to_nd_btt(dev);
ssize_t rc;
device_lock(dev);
nvdimm_bus_lock(dev);
guard(device)(dev);
guard(nvdimm_bus)(dev);
rc = nd_namespace_store(dev, &nd_btt->ndns, buf, len);
dev_dbg(dev, "result: %zd wrote: %s%s", rc, buf,
buf[len - 1] == '\n' ? "" : "\n");
nvdimm_bus_unlock(dev);
device_unlock(dev);
return rc;
}
@@ -351,9 +344,8 @@ int nd_btt_probe(struct device *dev, struct nd_namespace_common *ndns)
return -ENODEV;
}
nvdimm_bus_lock(&ndns->dev);
btt_dev = __nd_btt_create(nd_region, 0, NULL, ndns);
nvdimm_bus_unlock(&ndns->dev);
scoped_guard(nvdimm_bus, &ndns->dev)
btt_dev = __nd_btt_create(nd_region, 0, NULL, ndns);
if (!btt_dev)
return -ENOMEM;
btt_sb = devm_kzalloc(dev, sizeof(*btt_sb), GFP_KERNEL);

6
drivers/nvdimm/bus.c
View File

@@ -64,17 +64,15 @@ static struct module *to_bus_provider(struct device *dev)
static void nvdimm_bus_probe_start(struct nvdimm_bus *nvdimm_bus)
{
nvdimm_bus_lock(&nvdimm_bus->dev);
guard(nvdimm_bus)(&nvdimm_bus->dev);
nvdimm_bus->probe_active++;
nvdimm_bus_unlock(&nvdimm_bus->dev);
}
static void nvdimm_bus_probe_end(struct nvdimm_bus *nvdimm_bus)
{
nvdimm_bus_lock(&nvdimm_bus->dev);
guard(nvdimm_bus)(&nvdimm_bus->dev);
if (--nvdimm_bus->probe_active == 0)
wake_up(&nvdimm_bus->wait);
nvdimm_bus_unlock(&nvdimm_bus->dev);
}
static int nvdimm_bus_probe(struct device *dev)

7
drivers/nvdimm/claim.c
View File

@@ -34,11 +34,10 @@ void nd_detach_ndns(struct device *dev,
if (!ndns)
return;
get_device(&ndns->dev);
nvdimm_bus_lock(&ndns->dev);
struct device *ndev __free(put_device) = get_device(&ndns->dev);
guard(nvdimm_bus)(ndev);
__nd_detach_ndns(dev, _ndns);
nvdimm_bus_unlock(&ndns->dev);
put_device(&ndns->dev);
}
bool __nd_attach_ndns(struct device *dev, struct nd_namespace_common *attach,

17
drivers/nvdimm/core.c
View File

@@ -141,9 +141,8 @@ static void nvdimm_map_put(void *data)
struct nvdimm_map *nvdimm_map = data;
struct nvdimm_bus *nvdimm_bus = nvdimm_map->nvdimm_bus;
nvdimm_bus_lock(&nvdimm_bus->dev);
guard(nvdimm_bus)(&nvdimm_bus->dev);
kref_put(&nvdimm_map->kref, nvdimm_map_release);
nvdimm_bus_unlock(&nvdimm_bus->dev);
}
/**
@@ -158,13 +157,13 @@ void *devm_nvdimm_memremap(struct device *dev, resource_size_t offset,
{
struct nvdimm_map *nvdimm_map;
nvdimm_bus_lock(dev);
nvdimm_map = find_nvdimm_map(dev, offset);
if (!nvdimm_map)
nvdimm_map = alloc_nvdimm_map(dev, offset, size, flags);
else
kref_get(&nvdimm_map->kref);
nvdimm_bus_unlock(dev);
scoped_guard(nvdimm_bus, dev) {
nvdimm_map = find_nvdimm_map(dev, offset);
if (!nvdimm_map)
nvdimm_map = alloc_nvdimm_map(dev, offset, size, flags);
else
kref_get(&nvdimm_map->kref);
}
if (!nvdimm_map)
return NULL;

12
drivers/nvdimm/dax_devs.c
View File

@@ -104,12 +104,12 @@ int nd_dax_probe(struct device *dev, struct nd_namespace_common *ndns)
return -ENODEV;
}
nvdimm_bus_lock(&ndns->dev);
nd_dax = nd_dax_alloc(nd_region);
dax_dev = nd_dax_devinit(nd_dax, ndns);
nvdimm_bus_unlock(&ndns->dev);
if (!dax_dev)
return -ENOMEM;
scoped_guard(nvdimm_bus, &ndns->dev) {
nd_dax = nd_dax_alloc(nd_region);
dax_dev = nd_dax_devinit(nd_dax, ndns);
if (!dax_dev)
return -ENOMEM;
}
pfn_sb = devm_kmalloc(dev, sizeof(*pfn_sb), GFP_KERNEL);
nd_pfn = &nd_dax->nd_pfn;
nd_pfn->pfn_sb = pfn_sb;

5
drivers/nvdimm/dimm.c
View File

@@ -117,9 +117,8 @@ static void nvdimm_remove(struct device *dev)
{
struct nvdimm_drvdata *ndd = dev_get_drvdata(dev);
nvdimm_bus_lock(dev);
dev_set_drvdata(dev, NULL);
nvdimm_bus_unlock(dev);
scoped_guard(nvdimm_bus, dev)
dev_set_drvdata(dev, NULL);
put_ndd(ndd);
}

48
drivers/nvdimm/dimm_devs.c
View File

@@ -226,10 +226,10 @@ void nvdimm_drvdata_release(struct kref *kref)
struct resource *res, *_r;
dev_dbg(dev, "trace\n");
nvdimm_bus_lock(dev);
for_each_dpa_resource_safe(ndd, res, _r)
nvdimm_free_dpa(ndd, res);
nvdimm_bus_unlock(dev);
scoped_guard(nvdimm_bus, dev) {
for_each_dpa_resource_safe(ndd, res, _r)
nvdimm_free_dpa(ndd, res);
}
kvfree(ndd->data);
kfree(ndd);
@@ -319,23 +319,20 @@ static DEVICE_ATTR_RO(state);
static ssize_t __available_slots_show(struct nvdimm_drvdata *ndd, char *buf)
{
struct device *dev;
ssize_t rc;
u32 nfree;
if (!ndd)
return -ENXIO;
dev = ndd->dev;
nvdimm_bus_lock(dev);
guard(nvdimm_bus)(dev);
nfree = nd_label_nfree(ndd);
if (nfree - 1 > nfree) {
dev_WARN_ONCE(dev, 1, "we ate our last label?\n");
nfree = 0;
} else
nfree--;
rc = sprintf(buf, "%d\n", nfree);
nvdimm_bus_unlock(dev);
return rc;
return sprintf(buf, "%d\n", nfree);
}
static ssize_t available_slots_show(struct device *dev,
@@ -388,21 +385,15 @@ static ssize_t security_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t len)
{
ssize_t rc;
/*
* Require all userspace triggered security management to be
* done while probing is idle and the DIMM is not in active use
* in any region.
*/
device_lock(dev);
nvdimm_bus_lock(dev);
guard(device)(dev);
guard(nvdimm_bus)(dev);
wait_nvdimm_bus_probe_idle(dev);
rc = nvdimm_security_store(dev, buf, len);
nvdimm_bus_unlock(dev);
device_unlock(dev);
return rc;
return nvdimm_security_store(dev, buf, len);
}
static DEVICE_ATTR_RW(security);
@@ -454,9 +445,8 @@ static ssize_t result_show(struct device *dev, struct device_attribute *attr, ch
if (!nvdimm->fw_ops)
return -EOPNOTSUPP;
nvdimm_bus_lock(dev);
guard(nvdimm_bus)(dev);
result = nvdimm->fw_ops->activate_result(nvdimm);
nvdimm_bus_unlock(dev);
switch (result) {
case NVDIMM_FWA_RESULT_NONE:
@@ -483,9 +473,8 @@ static ssize_t activate_show(struct device *dev, struct device_attribute *attr,
if (!nvdimm->fw_ops)
return -EOPNOTSUPP;
nvdimm_bus_lock(dev);
guard(nvdimm_bus)(dev);
state = nvdimm->fw_ops->activate_state(nvdimm);
nvdimm_bus_unlock(dev);
switch (state) {
case NVDIMM_FWA_IDLE:
@@ -516,9 +505,8 @@ static ssize_t activate_store(struct device *dev, struct device_attribute *attr,
else
return -EINVAL;
nvdimm_bus_lock(dev);
guard(nvdimm_bus)(dev);
rc = nvdimm->fw_ops->arm(nvdimm, arg);
nvdimm_bus_unlock(dev);
if (rc < 0)
return rc;
@@ -545,9 +533,8 @@ static umode_t nvdimm_firmware_visible(struct kobject *kobj, struct attribute *a
if (!nvdimm->fw_ops)
return 0;
nvdimm_bus_lock(dev);
guard(nvdimm_bus)(dev);
cap = nd_desc->fw_ops->capability(nd_desc);
nvdimm_bus_unlock(dev);
if (cap < NVDIMM_FWA_CAP_QUIESCE)
return 0;
@@ -641,11 +628,10 @@ void nvdimm_delete(struct nvdimm *nvdimm)
bool dev_put = false;
/* We are shutting down. Make state frozen artificially. */
nvdimm_bus_lock(dev);
set_bit(NVDIMM_SECURITY_FROZEN, &nvdimm->sec.flags);
if (test_and_clear_bit(NDD_WORK_PENDING, &nvdimm->flags))
dev_put = true;
nvdimm_bus_unlock(dev);
scoped_guard(nvdimm_bus, dev) {
set_bit(NVDIMM_SECURITY_FROZEN, &nvdimm->sec.flags);
dev_put = test_and_clear_bit(NDD_WORK_PENDING, &nvdimm->flags);
}
cancel_delayed_work_sync(&nvdimm->dwork);
if (dev_put)
put_device(dev);

119
drivers/nvdimm/namespace_devs.c
View File

@@ -264,15 +264,13 @@ static ssize_t alt_name_store(struct device *dev,
struct nd_region *nd_region = to_nd_region(dev->parent);
ssize_t rc;
device_lock(dev);
nvdimm_bus_lock(dev);
guard(device)(dev);
guard(nvdimm_bus)(dev);
wait_nvdimm_bus_probe_idle(dev);
rc = __alt_name_store(dev, buf, len);
if (rc >= 0)
rc = nd_namespace_label_update(nd_region, dev);
dev_dbg(dev, "%s(%zd)\n", rc < 0 ? "fail " : "", rc);
nvdimm_bus_unlock(dev);
device_unlock(dev);
return rc < 0 ? rc : len;
}
@@ -849,8 +847,8 @@ static ssize_t size_store(struct device *dev,
if (rc)
return rc;
device_lock(dev);
nvdimm_bus_lock(dev);
guard(device)(dev);
guard(nvdimm_bus)(dev);
wait_nvdimm_bus_probe_idle(dev);
rc = __size_store(dev, val);
if (rc >= 0)
@@ -866,9 +864,6 @@ static ssize_t size_store(struct device *dev,
dev_dbg(dev, "%llx %s (%d)\n", val, rc < 0 ? "fail" : "success", rc);
nvdimm_bus_unlock(dev);
device_unlock(dev);
return rc < 0 ? rc : len;
}
@@ -891,13 +886,8 @@ resource_size_t __nvdimm_namespace_capacity(struct nd_namespace_common *ndns)
resource_size_t nvdimm_namespace_capacity(struct nd_namespace_common *ndns)
{
resource_size_t size;
nvdimm_bus_lock(&ndns->dev);
size = __nvdimm_namespace_capacity(ndns);
nvdimm_bus_unlock(&ndns->dev);
return size;
guard(nvdimm_bus)(&ndns->dev);
return __nvdimm_namespace_capacity(ndns);
}
EXPORT_SYMBOL(nvdimm_namespace_capacity);
@@ -1044,8 +1034,8 @@ static ssize_t uuid_store(struct device *dev,
} else
return -ENXIO;
device_lock(dev);
nvdimm_bus_lock(dev);
guard(device)(dev);
guard(nvdimm_bus)(dev);
wait_nvdimm_bus_probe_idle(dev);
if (to_ndns(dev)->claim)
rc = -EBUSY;
@@ -1059,8 +1049,6 @@ static ssize_t uuid_store(struct device *dev,
kfree(uuid);
dev_dbg(dev, "result: %zd wrote: %s%s", rc, buf,
buf[len - 1] == '\n' ? "" : "\n");
nvdimm_bus_unlock(dev);
device_unlock(dev);
return rc < 0 ? rc : len;
}
@@ -1119,20 +1107,30 @@ static ssize_t sector_size_store(struct device *dev,
} else
return -ENXIO;
device_lock(dev);
nvdimm_bus_lock(dev);
if (to_ndns(dev)->claim)
rc = -EBUSY;
if (rc >= 0)
rc = nd_size_select_store(dev, buf, lbasize, supported);
if (rc >= 0)
rc = nd_namespace_label_update(nd_region, dev);
dev_dbg(dev, "result: %zd %s: %s%s", rc, rc < 0 ? "tried" : "wrote",
buf, buf[len - 1] == '\n' ? "" : "\n");
nvdimm_bus_unlock(dev);
device_unlock(dev);
guard(device)(dev);
guard(nvdimm_bus)(dev);
if (to_ndns(dev)->claim) {
dev_dbg(dev, "namespace %s already claimed\n", dev_name(dev));
return -EBUSY;
}
return rc ? rc : len;
rc = nd_size_select_store(dev, buf, lbasize, supported);
if (rc < 0) {
dev_dbg(dev, "size select fail: %zd tried: %s%s", rc,
buf, buf[len - 1] == '\n' ? "" : "\n");
return rc;
}
rc = nd_namespace_label_update(nd_region, dev);
if (rc < 0) {
dev_dbg(dev, "label update fail: %zd tried: %s%s",
rc, buf, buf[len - 1] == '\n' ? "" : "\n");
return rc;
}
dev_dbg(dev, "wrote: %s%s", buf, buf[len - 1] == '\n' ? "" : "\n");
return len;
}
static DEVICE_ATTR_RW(sector_size);
@@ -1145,7 +1143,7 @@ static ssize_t dpa_extents_show(struct device *dev,
int count = 0, i;
u32 flags = 0;
nvdimm_bus_lock(dev);
guard(nvdimm_bus)(dev);
if (is_namespace_pmem(dev)) {
struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
@@ -1154,7 +1152,7 @@ static ssize_t dpa_extents_show(struct device *dev,
}
if (!uuid)
goto out;
return sprintf(buf, "%d\n", count);
nd_label_gen_id(&label_id, uuid, flags);
for (i = 0; i < nd_region->ndr_mappings; i++) {
@@ -1166,8 +1164,6 @@ static ssize_t dpa_extents_show(struct device *dev,
if (strcmp(res->name, label_id.id) == 0)
count++;
}
out:
nvdimm_bus_unlock(dev);
return sprintf(buf, "%d\n", count);
}
@@ -1279,15 +1275,13 @@ static ssize_t holder_class_store(struct device *dev,
struct nd_region *nd_region = to_nd_region(dev->parent);
int rc;
device_lock(dev);
nvdimm_bus_lock(dev);
guard(device)(dev);
guard(nvdimm_bus)(dev);
wait_nvdimm_bus_probe_idle(dev);
rc = __holder_class_store(dev, buf);
if (rc >= 0)
rc = nd_namespace_label_update(nd_region, dev);
dev_dbg(dev, "%s(%d)\n", rc < 0 ? "fail " : "", rc);
nvdimm_bus_unlock(dev);
device_unlock(dev);
return rc < 0 ? rc : len;
}
@@ -2152,31 +2146,38 @@ static int init_active_labels(struct nd_region *nd_region)
nd_region);
}
static int create_relevant_namespaces(struct nd_region *nd_region, int *type,
struct device ***devs)
{
int rc;
guard(nvdimm_bus)(&nd_region->dev);
rc = init_active_labels(nd_region);
if (rc)
return rc;
*type = nd_region_to_nstype(nd_region);
switch (*type) {
case ND_DEVICE_NAMESPACE_IO:
*devs = create_namespace_io(nd_region);
break;
case ND_DEVICE_NAMESPACE_PMEM:
*devs = create_namespaces(nd_region);
break;
}
return 0;
}
int nd_region_register_namespaces(struct nd_region *nd_region, int *err)
{
struct device **devs = NULL;
int i, rc = 0, type;
*err = 0;
nvdimm_bus_lock(&nd_region->dev);
rc = init_active_labels(nd_region);
if (rc) {
nvdimm_bus_unlock(&nd_region->dev);
rc = create_relevant_namespaces(nd_region, &type, &devs);
if (rc)
return rc;
}
type = nd_region_to_nstype(nd_region);
switch (type) {
case ND_DEVICE_NAMESPACE_IO:
devs = create_namespace_io(nd_region);
break;
case ND_DEVICE_NAMESPACE_PMEM:
devs = create_namespaces(nd_region);
break;
default:
break;
}
nvdimm_bus_unlock(&nd_region->dev);
if (!devs)
return -ENODEV;

3
drivers/nvdimm/nd.h
View File

@@ -632,6 +632,9 @@ u64 nd_region_interleave_set_cookie(struct nd_region *nd_region,
u64 nd_region_interleave_set_altcookie(struct nd_region *nd_region);
void nvdimm_bus_lock(struct device *dev);
void nvdimm_bus_unlock(struct device *dev);
DEFINE_GUARD(nvdimm_bus, struct device *,
if (_T) nvdimm_bus_lock(_T), if (_T) nvdimm_bus_unlock(_T));
bool is_nvdimm_bus_locked(struct device *dev);
void nvdimm_check_and_set_ro(struct gendisk *disk);
void nvdimm_drvdata_release(struct kref *kref);

61
drivers/nvdimm/pfn_devs.c
View File

@@ -56,30 +56,26 @@ static ssize_t mode_store(struct device *dev,
{
struct nd_pfn *nd_pfn = to_nd_pfn_safe(dev);
ssize_t rc = 0;
size_t n = len - 1;
device_lock(dev);
nvdimm_bus_lock(dev);
guard(device)(dev);
guard(nvdimm_bus)(dev);
if (dev->driver)
rc = -EBUSY;
else {
size_t n = len - 1;
return -EBUSY;
if (strncmp(buf, "pmem\n", n) == 0
|| strncmp(buf, "pmem", n) == 0) {
nd_pfn->mode = PFN_MODE_PMEM;
} else if (strncmp(buf, "ram\n", n) == 0
|| strncmp(buf, "ram", n) == 0)
nd_pfn->mode = PFN_MODE_RAM;
else if (strncmp(buf, "none\n", n) == 0
|| strncmp(buf, "none", n) == 0)
nd_pfn->mode = PFN_MODE_NONE;
else
rc = -EINVAL;
}
if (strncmp(buf, "pmem\n", n) == 0
|| strncmp(buf, "pmem", n) == 0) {
nd_pfn->mode = PFN_MODE_PMEM;
} else if (strncmp(buf, "ram\n", n) == 0
|| strncmp(buf, "ram", n) == 0)
nd_pfn->mode = PFN_MODE_RAM;
else if (strncmp(buf, "none\n", n) == 0
|| strncmp(buf, "none", n) == 0)
nd_pfn->mode = PFN_MODE_NONE;
else
rc = -EINVAL;
dev_dbg(dev, "result: %zd wrote: %s%s", rc, buf,
buf[len - 1] == '\n' ? "" : "\n");
nvdimm_bus_unlock(dev);
device_unlock(dev);
return rc ? rc : len;
}
@@ -125,14 +121,12 @@ static ssize_t align_store(struct device *dev,
unsigned long aligns[MAX_NVDIMM_ALIGN] = { [0] = 0, };
ssize_t rc;
device_lock(dev);
nvdimm_bus_lock(dev);
guard(device)(dev);
guard(nvdimm_bus)(dev);
rc = nd_size_select_store(dev, buf, &nd_pfn->align,
nd_pfn_supported_alignments(aligns));
dev_dbg(dev, "result: %zd wrote: %s%s", rc, buf,
buf[len - 1] == '\n' ? "" : "\n");
nvdimm_bus_unlock(dev);
device_unlock(dev);
return rc ? rc : len;
}
@@ -168,13 +162,10 @@ static ssize_t namespace_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct nd_pfn *nd_pfn = to_nd_pfn_safe(dev);
ssize_t rc;
nvdimm_bus_lock(dev);
rc = sprintf(buf, "%s\n", nd_pfn->ndns
guard(nvdimm_bus)(dev);
return sprintf(buf, "%s\n", nd_pfn->ndns
? dev_name(&nd_pfn->ndns->dev) : "");
nvdimm_bus_unlock(dev);
return rc;
}
static ssize_t namespace_store(struct device *dev,
@@ -183,13 +174,11 @@ static ssize_t namespace_store(struct device *dev,
struct nd_pfn *nd_pfn = to_nd_pfn_safe(dev);
ssize_t rc;
device_lock(dev);
nvdimm_bus_lock(dev);
guard(device)(dev);
guard(nvdimm_bus)(dev);
rc = nd_namespace_store(dev, &nd_pfn->ndns, buf, len);
dev_dbg(dev, "result: %zd wrote: %s%s", rc, buf,
buf[len - 1] == '\n' ? "" : "\n");
nvdimm_bus_unlock(dev);
device_unlock(dev);
return rc;
}
@@ -639,10 +628,10 @@ int nd_pfn_probe(struct device *dev, struct nd_namespace_common *ndns)
return -ENODEV;
}
nvdimm_bus_lock(&ndns->dev);
nd_pfn = nd_pfn_alloc(nd_region);
pfn_dev = nd_pfn_devinit(nd_pfn, ndns);
nvdimm_bus_unlock(&ndns->dev);
scoped_guard(nvdimm_bus, &ndns->dev) {
nd_pfn = nd_pfn_alloc(nd_region);
pfn_dev = nd_pfn_devinit(nd_pfn, ndns);
}
if (!pfn_dev)
return -ENOMEM;
pfn_sb = devm_kmalloc(dev, sizeof(*pfn_sb), GFP_KERNEL);

14
drivers/nvdimm/region.c
View File

@@ -87,13 +87,13 @@ static void nd_region_remove(struct device *dev)
device_for_each_child(dev, NULL, child_unregister);
/* flush attribute readers and disable */
nvdimm_bus_lock(dev);
nd_region->ns_seed = NULL;
nd_region->btt_seed = NULL;
nd_region->pfn_seed = NULL;
nd_region->dax_seed = NULL;
dev_set_drvdata(dev, NULL);
nvdimm_bus_unlock(dev);
scoped_guard(nvdimm_bus, dev) {
nd_region->ns_seed = NULL;
nd_region->btt_seed = NULL;
nd_region->pfn_seed = NULL;
nd_region->dax_seed = NULL;
dev_set_drvdata(dev, NULL);
}
/*
* Note, this assumes device_lock() context to not race

118
drivers/nvdimm/region_devs.c
View File

@@ -102,31 +102,44 @@ static int nd_region_invalidate_memregion(struct nd_region *nd_region)
return 0;
}
int nd_region_activate(struct nd_region *nd_region)
static int get_flush_data(struct nd_region *nd_region, size_t *size, int *num_flush)
{
int i, j, rc, num_flush = 0;
struct nd_region_data *ndrd;
struct device *dev = &nd_region->dev;
size_t flush_data_size = sizeof(void *);
int _num_flush = 0;
int i;
nvdimm_bus_lock(&nd_region->dev);
guard(nvdimm_bus)(&nd_region->dev);
for (i = 0; i < nd_region->ndr_mappings; i++) {
struct nd_mapping *nd_mapping = &nd_region->mapping[i];
struct nvdimm *nvdimm = nd_mapping->nvdimm;
if (test_bit(NDD_SECURITY_OVERWRITE, &nvdimm->flags)) {
nvdimm_bus_unlock(&nd_region->dev);
if (test_bit(NDD_SECURITY_OVERWRITE, &nvdimm->flags))
return -EBUSY;
}
/* at least one null hint slot per-dimm for the "no-hint" case */
flush_data_size += sizeof(void *);
num_flush = min_not_zero(num_flush, nvdimm->num_flush);
_num_flush = min_not_zero(_num_flush, nvdimm->num_flush);
if (!nvdimm->num_flush)
continue;
flush_data_size += nvdimm->num_flush * sizeof(void *);
}
nvdimm_bus_unlock(&nd_region->dev);
*size = flush_data_size;
*num_flush = _num_flush;
return 0;
}
int nd_region_activate(struct nd_region *nd_region)
{
int i, j, rc, num_flush;
struct nd_region_data *ndrd;
struct device *dev = &nd_region->dev;
size_t flush_data_size;
rc = get_flush_data(nd_region, &flush_data_size, &num_flush);
if (rc)
return rc;
rc = nd_region_invalidate_memregion(nd_region);
if (rc)
@@ -327,8 +340,8 @@ static ssize_t set_cookie_show(struct device *dev,
* the v1.1 namespace label cookie definition. To read all this
* data we need to wait for probing to settle.
*/
device_lock(dev);
nvdimm_bus_lock(dev);
guard(device)(dev);
guard(nvdimm_bus)(dev);
wait_nvdimm_bus_probe_idle(dev);
if (nd_region->ndr_mappings) {
struct nd_mapping *nd_mapping = &nd_region->mapping[0];
@@ -343,8 +356,6 @@ static ssize_t set_cookie_show(struct device *dev,
nsindex));
}
}
nvdimm_bus_unlock(dev);
device_unlock(dev);
if (rc)
return rc;
@@ -393,7 +404,6 @@ static ssize_t available_size_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct nd_region *nd_region = to_nd_region(dev);
unsigned long long available = 0;
/*
* Flush in-flight updates and grab a snapshot of the available
@@ -401,14 +411,11 @@ static ssize_t available_size_show(struct device *dev,
* memory nvdimm_bus_lock() is dropped, but that's userspace's
* problem to not race itself.
*/
device_lock(dev);
nvdimm_bus_lock(dev);
guard(device)(dev);
guard(nvdimm_bus)(dev);
wait_nvdimm_bus_probe_idle(dev);
available = nd_region_available_dpa(nd_region);
nvdimm_bus_unlock(dev);
device_unlock(dev);
return sprintf(buf, "%llu\n", available);
return sprintf(buf, "%llu\n", nd_region_available_dpa(nd_region));
}
static DEVICE_ATTR_RO(available_size);
@@ -416,16 +423,12 @@ static ssize_t max_available_extent_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct nd_region *nd_region = to_nd_region(dev);
unsigned long long available = 0;
device_lock(dev);
nvdimm_bus_lock(dev);
guard(device)(dev);
guard(nvdimm_bus)(dev);
wait_nvdimm_bus_probe_idle(dev);
available = nd_region_allocatable_dpa(nd_region);
nvdimm_bus_unlock(dev);
device_unlock(dev);
return sprintf(buf, "%llu\n", available);
return sprintf(buf, "%llu\n", nd_region_allocatable_dpa(nd_region));
}
static DEVICE_ATTR_RO(max_available_extent);
@@ -433,16 +436,12 @@ static ssize_t init_namespaces_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct nd_region_data *ndrd = dev_get_drvdata(dev);
ssize_t rc;
nvdimm_bus_lock(dev);
if (ndrd)
rc = sprintf(buf, "%d/%d\n", ndrd->ns_active, ndrd->ns_count);
else
rc = -ENXIO;
nvdimm_bus_unlock(dev);
guard(nvdimm_bus)(dev);
if (!ndrd)
return -ENXIO;
return rc;
return sprintf(buf, "%d/%d\n", ndrd->ns_active, ndrd->ns_count);
}
static DEVICE_ATTR_RO(init_namespaces);
@@ -450,15 +449,12 @@ static ssize_t namespace_seed_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct nd_region *nd_region = to_nd_region(dev);
ssize_t rc;
nvdimm_bus_lock(dev);
guard(nvdimm_bus)(dev);
if (nd_region->ns_seed)
rc = sprintf(buf, "%s\n", dev_name(nd_region->ns_seed));
else
rc = sprintf(buf, "\n");
nvdimm_bus_unlock(dev);
return rc;
return sprintf(buf, "%s\n", dev_name(nd_region->ns_seed));
return sprintf(buf, "\n");
}
static DEVICE_ATTR_RO(namespace_seed);
@@ -466,16 +462,12 @@ static ssize_t btt_seed_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct nd_region *nd_region = to_nd_region(dev);
ssize_t rc;
nvdimm_bus_lock(dev);
guard(nvdimm_bus)(dev);
if (nd_region->btt_seed)
rc = sprintf(buf, "%s\n", dev_name(nd_region->btt_seed));
else
rc = sprintf(buf, "\n");
nvdimm_bus_unlock(dev);
return sprintf(buf, "%s\n", dev_name(nd_region->btt_seed));
return rc;
return sprintf(buf, "\n");
}
static DEVICE_ATTR_RO(btt_seed);
@@ -483,16 +475,12 @@ static ssize_t pfn_seed_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct nd_region *nd_region = to_nd_region(dev);
ssize_t rc;
nvdimm_bus_lock(dev);
guard(nvdimm_bus)(dev);
if (nd_region->pfn_seed)
rc = sprintf(buf, "%s\n", dev_name(nd_region->pfn_seed));
else
rc = sprintf(buf, "\n");
nvdimm_bus_unlock(dev);
return sprintf(buf, "%s\n", dev_name(nd_region->pfn_seed));
return rc;
return sprintf(buf, "\n");
}
static DEVICE_ATTR_RO(pfn_seed);
@@ -500,16 +488,12 @@ static ssize_t dax_seed_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct nd_region *nd_region = to_nd_region(dev);
ssize_t rc;
nvdimm_bus_lock(dev);
guard(nvdimm_bus)(dev);
if (nd_region->dax_seed)
rc = sprintf(buf, "%s\n", dev_name(nd_region->dax_seed));
else
rc = sprintf(buf, "\n");
nvdimm_bus_unlock(dev);
return sprintf(buf, "%s\n", dev_name(nd_region->dax_seed));
return rc;
return sprintf(buf, "\n");
}
static DEVICE_ATTR_RO(dax_seed);
@@ -581,9 +565,8 @@ static ssize_t align_store(struct device *dev,
* times ensure it does not change for the duration of the
* allocation.
*/
nvdimm_bus_lock(dev);
guard(nvdimm_bus)(dev);
nd_region->align = val;
nvdimm_bus_unlock(dev);
return len;
}
@@ -890,7 +873,7 @@ void nd_mapping_free_labels(struct nd_mapping *nd_mapping)
*/
void nd_region_advance_seeds(struct nd_region *nd_region, struct device *dev)
{
nvdimm_bus_lock(dev);
guard(nvdimm_bus)(dev);
if (nd_region->ns_seed == dev) {
nd_region_create_ns_seed(nd_region);
} else if (is_nd_btt(dev)) {
@@ -915,7 +898,6 @@ void nd_region_advance_seeds(struct nd_region *nd_region, struct device *dev)
if (nd_region->ns_seed == &nd_dax->nd_pfn.ndns->dev)
nd_region_create_ns_seed(nd_region);
}
nvdimm_bus_unlock(dev);
}
/**

10
drivers/nvdimm/security.c
View File

@@ -219,12 +219,9 @@ static int __nvdimm_security_unlock(struct nvdimm *nvdimm)
int nvdimm_security_unlock(struct device *dev)
{
struct nvdimm *nvdimm = to_nvdimm(dev);
int rc;
nvdimm_bus_lock(dev);
rc = __nvdimm_security_unlock(nvdimm);
nvdimm_bus_unlock(dev);
return rc;
guard(nvdimm_bus)(dev);
return __nvdimm_security_unlock(nvdimm);
}
static int check_security_state(struct nvdimm *nvdimm)
@@ -490,9 +487,8 @@ void nvdimm_security_overwrite_query(struct work_struct *work)
struct nvdimm *nvdimm =
container_of(work, typeof(*nvdimm), dwork.work);
nvdimm_bus_lock(&nvdimm->dev);
guard(nvdimm_bus)(&nvdimm->dev);
__nvdimm_security_overwrite_query(nvdimm);
nvdimm_bus_unlock(&nvdimm->dev);
}
#define OPS \