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authorLinus Torvalds <torvalds@linux-foundation.org>2019-07-27 18:25:51 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2019-07-27 18:25:51 +0300
commit523634db145a22cd5562714d4c59ea74686afe38 (patch)
tree14f3fa773866d9afe83af9257ff0dffac84e25ac /drivers/nvdimm/pfn_devs.c
parent5168afe6ef596eaf2ff7a533b780c79ce14445e4 (diff)
parent87a30e1f05d73a34e6d1895065541369131aaf1c (diff)
downloadlinux-523634db145a22cd5562714d4c59ea74686afe38.tar.xz
Merge tag 'libnvdimm-fixes-5.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm
Pull libnvdimm fixes from Dan Williams: "A collection of locking and async operations fixes for v5.3-rc2. These had been soaking in a branch targeting the merge window, but missed due to a regression hunt. This fixed up version has otherwise been in -next this past week with no reported issues. In order to gain confidence in the locking changes the pull also includes a debug / instrumentation patch to enable lockdep coverage for libnvdimm subsystem operations that depend on the device_lock for exclusion. As mentioned in the changelog it is a hack, but it works and documents the locking expectations of the sub-system in a way that others can use lockdep to verify. The driver core touches got an ack from Greg. Summary: - Fix duplicate device_unregister() calls (multiple threads competing to do unregister work when scheduling device removal from a sysfs attribute of the self-same device). - Fix badblocks registration order bug. Ensure region badblocks are initialized in advance of namespace registration. - Fix a deadlock between the bus lock and probe operations. - Export device-core infrastructure to coordinate async operations via the device ->dead state. - Add device-core infrastructure to validate device_lock() usage with lockdep" * tag 'libnvdimm-fixes-5.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm: driver-core, libnvdimm: Let device subsystems add local lockdep coverage libnvdimm/bus: Fix wait_nvdimm_bus_probe_idle() ABBA deadlock libnvdimm/bus: Stop holding nvdimm_bus_list_mutex over __nd_ioctl() libnvdimm/bus: Prepare the nd_ioctl() path to be re-entrant libnvdimm/region: Register badblocks before namespaces libnvdimm/bus: Prevent duplicate device_unregister() calls drivers/base: Introduce kill_device()
Diffstat (limited to 'drivers/nvdimm/pfn_devs.c')
-rw-r--r--drivers/nvdimm/pfn_devs.c24
1 files changed, 12 insertions, 12 deletions
diff --git a/drivers/nvdimm/pfn_devs.c b/drivers/nvdimm/pfn_devs.c
index df2bdbd22450..3e7b11cf1aae 100644
--- a/drivers/nvdimm/pfn_devs.c
+++ b/drivers/nvdimm/pfn_devs.c
@@ -67,7 +67,7 @@ static ssize_t mode_store(struct device *dev,
struct nd_pfn *nd_pfn = to_nd_pfn_safe(dev);
ssize_t rc = 0;
- device_lock(dev);
+ nd_device_lock(dev);
nvdimm_bus_lock(dev);
if (dev->driver)
rc = -EBUSY;
@@ -89,7 +89,7 @@ static ssize_t mode_store(struct device *dev,
dev_dbg(dev, "result: %zd wrote: %s%s", rc, buf,
buf[len - 1] == '\n' ? "" : "\n");
nvdimm_bus_unlock(dev);
- device_unlock(dev);
+ nd_device_unlock(dev);
return rc ? rc : len;
}
@@ -132,14 +132,14 @@ static ssize_t align_store(struct device *dev,
struct nd_pfn *nd_pfn = to_nd_pfn_safe(dev);
ssize_t rc;
- device_lock(dev);
+ nd_device_lock(dev);
nvdimm_bus_lock(dev);
rc = nd_size_select_store(dev, buf, &nd_pfn->align,
nd_pfn_supported_alignments());
dev_dbg(dev, "result: %zd wrote: %s%s", rc, buf,
buf[len - 1] == '\n' ? "" : "\n");
nvdimm_bus_unlock(dev);
- device_unlock(dev);
+ nd_device_unlock(dev);
return rc ? rc : len;
}
@@ -161,11 +161,11 @@ static ssize_t uuid_store(struct device *dev,
struct nd_pfn *nd_pfn = to_nd_pfn_safe(dev);
ssize_t rc;
- device_lock(dev);
+ nd_device_lock(dev);
rc = nd_uuid_store(dev, &nd_pfn->uuid, buf, len);
dev_dbg(dev, "result: %zd wrote: %s%s", rc, buf,
buf[len - 1] == '\n' ? "" : "\n");
- device_unlock(dev);
+ nd_device_unlock(dev);
return rc ? rc : len;
}
@@ -190,13 +190,13 @@ static ssize_t namespace_store(struct device *dev,
struct nd_pfn *nd_pfn = to_nd_pfn_safe(dev);
ssize_t rc;
- device_lock(dev);
+ nd_device_lock(dev);
nvdimm_bus_lock(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);
+ nd_device_unlock(dev);
return rc;
}
@@ -208,7 +208,7 @@ static ssize_t resource_show(struct device *dev,
struct nd_pfn *nd_pfn = to_nd_pfn_safe(dev);
ssize_t rc;
- device_lock(dev);
+ nd_device_lock(dev);
if (dev->driver) {
struct nd_pfn_sb *pfn_sb = nd_pfn->pfn_sb;
u64 offset = __le64_to_cpu(pfn_sb->dataoff);
@@ -222,7 +222,7 @@ static ssize_t resource_show(struct device *dev,
/* no address to convey if the pfn instance is disabled */
rc = -ENXIO;
}
- device_unlock(dev);
+ nd_device_unlock(dev);
return rc;
}
@@ -234,7 +234,7 @@ static ssize_t size_show(struct device *dev,
struct nd_pfn *nd_pfn = to_nd_pfn_safe(dev);
ssize_t rc;
- device_lock(dev);
+ nd_device_lock(dev);
if (dev->driver) {
struct nd_pfn_sb *pfn_sb = nd_pfn->pfn_sb;
u64 offset = __le64_to_cpu(pfn_sb->dataoff);
@@ -250,7 +250,7 @@ static ssize_t size_show(struct device *dev,
/* no size to convey if the pfn instance is disabled */
rc = -ENXIO;
}
- device_unlock(dev);
+ nd_device_unlock(dev);
return rc;
}