driver-core, libnvdimm: Let device subsystems add local lockdep coverage
For good reason, the standard device_lock() is marked
lockdep_set_novalidate_class() because there is simply no sane way to
describe the myriad ways the device_lock() ordered with other locks.
However, that leaves subsystems that know their own local device_lock()
ordering rules to find lock ordering mistakes manually. Instead,
introduce an optional / additional lockdep-enabled lock that a subsystem
can acquire in all the same paths that the device_lock() is acquired.
A conversion of the NFIT driver and NVDIMM subsystem to a
lockdep-validate device_lock() scheme is included. The
debug_nvdimm_lock() implementation implements the correct lock-class and
stacking order for the libnvdimm device topology hierarchy.
Yes, this is a hack, but hopefully it is a useful hack for other
subsystems device_lock() debug sessions. Quoting Greg:
"Yeah, it feels a bit hacky but it's really up to a subsystem to mess up
using it as much as anything else, so user beware :)
I don't object to it if it makes things easier for you to debug."
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Ira Weiny <ira.weiny@intel.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Dave Jiang <dave.jiang@intel.com>
Cc: Keith Busch <keith.busch@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Vishal Verma <vishal.l.verma@intel.com>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Link: https://lore.kernel.org/r/156341210661.292348.7014034644265455704.stgit@dwillia2-desk3.amr.corp.intel.com
alistair/sunxi64-5.4-dsi
Dan Williams
parent
ca6bf264f6
commit
87a30e1f05
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@ -1282,7 +1282,7 @@ static ssize_t hw_error_scrub_store(struct device *dev,
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if (rc)
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return rc;
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device_lock(dev);
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nfit_device_lock(dev);
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nd_desc = dev_get_drvdata(dev);
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if (nd_desc) {
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struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc);
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@ -1299,7 +1299,7 @@ static ssize_t hw_error_scrub_store(struct device *dev,
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break;
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}
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}
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device_unlock(dev);
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nfit_device_unlock(dev);
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if (rc)
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return rc;
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return size;
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@ -1319,7 +1319,7 @@ static ssize_t scrub_show(struct device *dev,
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ssize_t rc = -ENXIO;
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bool busy;
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device_lock(dev);
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nfit_device_lock(dev);
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nd_desc = dev_get_drvdata(dev);
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if (!nd_desc) {
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device_unlock(dev);
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@ -1339,7 +1339,7 @@ static ssize_t scrub_show(struct device *dev,
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}
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mutex_unlock(&acpi_desc->init_mutex);
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device_unlock(dev);
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nfit_device_unlock(dev);
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return rc;
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}
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@ -1356,14 +1356,14 @@ static ssize_t scrub_store(struct device *dev,
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if (val != 1)
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return -EINVAL;
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device_lock(dev);
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nfit_device_lock(dev);
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nd_desc = dev_get_drvdata(dev);
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if (nd_desc) {
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struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc);
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rc = acpi_nfit_ars_rescan(acpi_desc, ARS_REQ_LONG);
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}
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device_unlock(dev);
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nfit_device_unlock(dev);
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if (rc)
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return rc;
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return size;
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@ -1749,9 +1749,9 @@ static void acpi_nvdimm_notify(acpi_handle handle, u32 event, void *data)
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struct acpi_device *adev = data;
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struct device *dev = &adev->dev;
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device_lock(dev->parent);
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nfit_device_lock(dev->parent);
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__acpi_nvdimm_notify(dev, event);
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device_unlock(dev->parent);
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nfit_device_unlock(dev->parent);
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}
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static bool acpi_nvdimm_has_method(struct acpi_device *adev, char *method)
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@ -3457,8 +3457,8 @@ static int acpi_nfit_flush_probe(struct nvdimm_bus_descriptor *nd_desc)
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struct device *dev = acpi_desc->dev;
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/* Bounce the device lock to flush acpi_nfit_add / acpi_nfit_notify */
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device_lock(dev);
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device_unlock(dev);
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nfit_device_lock(dev);
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nfit_device_unlock(dev);
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/* Bounce the init_mutex to complete initial registration */
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mutex_lock(&acpi_desc->init_mutex);
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@ -3602,8 +3602,8 @@ void acpi_nfit_shutdown(void *data)
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* acpi_nfit_ars_rescan() submissions have had a chance to
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* either submit or see ->cancel set.
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*/
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device_lock(bus_dev);
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device_unlock(bus_dev);
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nfit_device_lock(bus_dev);
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nfit_device_unlock(bus_dev);
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flush_workqueue(nfit_wq);
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}
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@ -3746,9 +3746,9 @@ EXPORT_SYMBOL_GPL(__acpi_nfit_notify);
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static void acpi_nfit_notify(struct acpi_device *adev, u32 event)
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{
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device_lock(&adev->dev);
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nfit_device_lock(&adev->dev);
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__acpi_nfit_notify(&adev->dev, adev->handle, event);
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device_unlock(&adev->dev);
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nfit_device_unlock(&adev->dev);
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}
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static const struct acpi_device_id acpi_nfit_ids[] = {
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@ -312,6 +312,30 @@ static inline struct acpi_nfit_desc *to_acpi_desc(
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return container_of(nd_desc, struct acpi_nfit_desc, nd_desc);
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}
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#ifdef CONFIG_PROVE_LOCKING
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static inline void nfit_device_lock(struct device *dev)
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{
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device_lock(dev);
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mutex_lock(&dev->lockdep_mutex);
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}
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static inline void nfit_device_unlock(struct device *dev)
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{
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mutex_unlock(&dev->lockdep_mutex);
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device_unlock(dev);
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}
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#else
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static inline void nfit_device_lock(struct device *dev)
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{
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device_lock(dev);
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}
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static inline void nfit_device_unlock(struct device *dev)
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{
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device_unlock(dev);
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}
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#endif
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const guid_t *to_nfit_uuid(enum nfit_uuids id);
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int acpi_nfit_init(struct acpi_nfit_desc *acpi_desc, void *nfit, acpi_size sz);
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void acpi_nfit_shutdown(void *data);
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@ -1663,6 +1663,9 @@ void device_initialize(struct device *dev)
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kobject_init(&dev->kobj, &device_ktype);
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INIT_LIST_HEAD(&dev->dma_pools);
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mutex_init(&dev->mutex);
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#ifdef CONFIG_PROVE_LOCKING
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mutex_init(&dev->lockdep_mutex);
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#endif
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lockdep_set_novalidate_class(&dev->mutex);
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spin_lock_init(&dev->devres_lock);
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INIT_LIST_HEAD(&dev->devres_head);
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@ -62,14 +62,14 @@ static ssize_t sector_size_store(struct device *dev,
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struct nd_btt *nd_btt = to_nd_btt(dev);
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ssize_t rc;
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device_lock(dev);
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nd_device_lock(dev);
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nvdimm_bus_lock(dev);
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rc = nd_size_select_store(dev, buf, &nd_btt->lbasize,
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btt_lbasize_supported);
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dev_dbg(dev, "result: %zd wrote: %s%s", rc, buf,
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buf[len - 1] == '\n' ? "" : "\n");
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nvdimm_bus_unlock(dev);
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device_unlock(dev);
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nd_device_unlock(dev);
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return rc ? rc : len;
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}
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@ -91,11 +91,11 @@ static ssize_t uuid_store(struct device *dev,
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struct nd_btt *nd_btt = to_nd_btt(dev);
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ssize_t rc;
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device_lock(dev);
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nd_device_lock(dev);
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rc = nd_uuid_store(dev, &nd_btt->uuid, buf, len);
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dev_dbg(dev, "result: %zd wrote: %s%s", rc, buf,
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buf[len - 1] == '\n' ? "" : "\n");
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device_unlock(dev);
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nd_device_unlock(dev);
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return rc ? rc : len;
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}
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@ -120,13 +120,13 @@ static ssize_t namespace_store(struct device *dev,
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struct nd_btt *nd_btt = to_nd_btt(dev);
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ssize_t rc;
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device_lock(dev);
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nd_device_lock(dev);
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nvdimm_bus_lock(dev);
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rc = nd_namespace_store(dev, &nd_btt->ndns, buf, len);
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dev_dbg(dev, "result: %zd wrote: %s%s", rc, buf,
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buf[len - 1] == '\n' ? "" : "\n");
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nvdimm_bus_unlock(dev);
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device_unlock(dev);
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nd_device_unlock(dev);
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return rc;
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}
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@ -138,14 +138,14 @@ static ssize_t size_show(struct device *dev,
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struct nd_btt *nd_btt = to_nd_btt(dev);
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ssize_t rc;
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device_lock(dev);
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nd_device_lock(dev);
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if (dev->driver)
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rc = sprintf(buf, "%llu\n", nd_btt->size);
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else {
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/* no size to convey if the btt instance is disabled */
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rc = -ENXIO;
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}
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device_unlock(dev);
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nd_device_unlock(dev);
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return rc;
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}
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@ -26,7 +26,7 @@
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int nvdimm_major;
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static int nvdimm_bus_major;
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static struct class *nd_class;
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struct class *nd_class;
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static DEFINE_IDA(nd_ida);
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static int to_nd_device_type(struct device *dev)
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@ -91,7 +91,10 @@ static int nvdimm_bus_probe(struct device *dev)
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dev->driver->name, dev_name(dev));
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nvdimm_bus_probe_start(nvdimm_bus);
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debug_nvdimm_lock(dev);
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rc = nd_drv->probe(dev);
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debug_nvdimm_unlock(dev);
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if (rc == 0)
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nd_region_probe_success(nvdimm_bus, dev);
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else
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@ -113,8 +116,11 @@ static int nvdimm_bus_remove(struct device *dev)
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struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev);
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int rc = 0;
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if (nd_drv->remove)
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if (nd_drv->remove) {
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debug_nvdimm_lock(dev);
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rc = nd_drv->remove(dev);
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debug_nvdimm_unlock(dev);
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}
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nd_region_disable(nvdimm_bus, dev);
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dev_dbg(&nvdimm_bus->dev, "%s.remove(%s) = %d\n", dev->driver->name,
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@ -140,7 +146,7 @@ static void nvdimm_bus_shutdown(struct device *dev)
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void nd_device_notify(struct device *dev, enum nvdimm_event event)
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{
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device_lock(dev);
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nd_device_lock(dev);
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if (dev->driver) {
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struct nd_device_driver *nd_drv;
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@ -148,7 +154,7 @@ void nd_device_notify(struct device *dev, enum nvdimm_event event)
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if (nd_drv->notify)
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nd_drv->notify(dev, event);
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}
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device_unlock(dev);
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nd_device_unlock(dev);
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}
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EXPORT_SYMBOL(nd_device_notify);
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@ -296,7 +302,7 @@ static void nvdimm_bus_release(struct device *dev)
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kfree(nvdimm_bus);
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}
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static bool is_nvdimm_bus(struct device *dev)
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bool is_nvdimm_bus(struct device *dev)
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{
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return dev->release == nvdimm_bus_release;
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}
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@ -575,9 +581,9 @@ void nd_device_unregister(struct device *dev, enum nd_async_mode mode)
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* or otherwise let the async path handle it if the
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* unregistration was already queued.
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*/
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device_lock(dev);
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nd_device_lock(dev);
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killed = kill_device(dev);
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device_unlock(dev);
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nd_device_unlock(dev);
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if (!killed)
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return;
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@ -888,10 +894,10 @@ void wait_nvdimm_bus_probe_idle(struct device *dev)
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if (nvdimm_bus->probe_active == 0)
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break;
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nvdimm_bus_unlock(dev);
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device_unlock(dev);
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nd_device_unlock(dev);
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wait_event(nvdimm_bus->wait,
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nvdimm_bus->probe_active == 0);
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device_lock(dev);
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nd_device_lock(dev);
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nvdimm_bus_lock(dev);
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} while (true);
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}
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@ -1107,7 +1113,7 @@ static int __nd_ioctl(struct nvdimm_bus *nvdimm_bus, struct nvdimm *nvdimm,
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goto out;
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}
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device_lock(dev);
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nd_device_lock(dev);
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nvdimm_bus_lock(dev);
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rc = nd_cmd_clear_to_send(nvdimm_bus, nvdimm, func, buf);
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if (rc)
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@ -1129,7 +1135,7 @@ static int __nd_ioctl(struct nvdimm_bus *nvdimm_bus, struct nvdimm *nvdimm,
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out_unlock:
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nvdimm_bus_unlock(dev);
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device_unlock(dev);
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nd_device_unlock(dev);
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out:
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kfree(in_env);
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kfree(out_env);
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@ -246,7 +246,7 @@ static int nd_uuid_parse(struct device *dev, u8 *uuid_out, const char *buf,
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*
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* Enforce that uuids can only be changed while the device is disabled
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* (driver detached)
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* LOCKING: expects device_lock() is held on entry
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* LOCKING: expects nd_device_lock() is held on entry
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*/
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int nd_uuid_store(struct device *dev, u8 **uuid_out, const char *buf,
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size_t len)
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@ -347,15 +347,15 @@ static DEVICE_ATTR_RO(provider);
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static int flush_namespaces(struct device *dev, void *data)
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{
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device_lock(dev);
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device_unlock(dev);
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nd_device_lock(dev);
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nd_device_unlock(dev);
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return 0;
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}
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static int flush_regions_dimms(struct device *dev, void *data)
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{
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device_lock(dev);
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device_unlock(dev);
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nd_device_lock(dev);
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nd_device_unlock(dev);
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device_for_each_child(dev, NULL, flush_namespaces);
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return 0;
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}
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@ -484,12 +484,12 @@ static ssize_t security_store(struct device *dev,
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* done while probing is idle and the DIMM is not in active use
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* in any region.
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*/
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device_lock(dev);
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nd_device_lock(dev);
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nvdimm_bus_lock(dev);
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wait_nvdimm_bus_probe_idle(dev);
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rc = __security_store(dev, buf, len);
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nvdimm_bus_unlock(dev);
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device_unlock(dev);
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nd_device_unlock(dev);
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return rc;
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}
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@ -410,7 +410,7 @@ static ssize_t alt_name_store(struct device *dev,
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struct nd_region *nd_region = to_nd_region(dev->parent);
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ssize_t rc;
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device_lock(dev);
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nd_device_lock(dev);
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nvdimm_bus_lock(dev);
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wait_nvdimm_bus_probe_idle(dev);
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rc = __alt_name_store(dev, buf, len);
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@ -418,7 +418,7 @@ static ssize_t alt_name_store(struct device *dev,
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rc = nd_namespace_label_update(nd_region, dev);
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dev_dbg(dev, "%s(%zd)\n", rc < 0 ? "fail " : "", rc);
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nvdimm_bus_unlock(dev);
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device_unlock(dev);
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nd_device_unlock(dev);
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return rc < 0 ? rc : len;
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}
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@ -1077,7 +1077,7 @@ static ssize_t size_store(struct device *dev,
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if (rc)
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return rc;
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device_lock(dev);
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nd_device_lock(dev);
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nvdimm_bus_lock(dev);
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wait_nvdimm_bus_probe_idle(dev);
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rc = __size_store(dev, val);
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@ -1103,7 +1103,7 @@ static ssize_t size_store(struct device *dev,
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dev_dbg(dev, "%llx %s (%d)\n", val, rc < 0 ? "fail" : "success", rc);
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nvdimm_bus_unlock(dev);
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device_unlock(dev);
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nd_device_unlock(dev);
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|
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return rc < 0 ? rc : len;
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}
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|
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@ -1286,7 +1286,7 @@ static ssize_t uuid_store(struct device *dev,
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} else
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return -ENXIO;
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|
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device_lock(dev);
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nd_device_lock(dev);
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nvdimm_bus_lock(dev);
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wait_nvdimm_bus_probe_idle(dev);
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if (to_ndns(dev)->claim)
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|
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@ -1302,7 +1302,7 @@ static ssize_t uuid_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 < 0 ? rc : len;
|
||||
}
|
||||
|
|
@ -1376,7 +1376,7 @@ static ssize_t sector_size_store(struct device *dev,
|
|||
} else
|
||||
return -ENXIO;
|
||||
|
||||
device_lock(dev);
|
||||
nd_device_lock(dev);
|
||||
nvdimm_bus_lock(dev);
|
||||
if (to_ndns(dev)->claim)
|
||||
rc = -EBUSY;
|
||||
|
|
@ -1387,7 +1387,7 @@ static ssize_t sector_size_store(struct device *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);
|
||||
nd_device_unlock(dev);
|
||||
|
||||
return rc ? rc : len;
|
||||
}
|
||||
|
|
@ -1502,9 +1502,9 @@ static ssize_t holder_show(struct device *dev,
|
|||
struct nd_namespace_common *ndns = to_ndns(dev);
|
||||
ssize_t rc;
|
||||
|
||||
device_lock(dev);
|
||||
nd_device_lock(dev);
|
||||
rc = sprintf(buf, "%s\n", ndns->claim ? dev_name(ndns->claim) : "");
|
||||
device_unlock(dev);
|
||||
nd_device_unlock(dev);
|
||||
|
||||
return rc;
|
||||
}
|
||||
|
|
@ -1541,7 +1541,7 @@ static ssize_t holder_class_store(struct device *dev,
|
|||
struct nd_region *nd_region = to_nd_region(dev->parent);
|
||||
ssize_t rc;
|
||||
|
||||
device_lock(dev);
|
||||
nd_device_lock(dev);
|
||||
nvdimm_bus_lock(dev);
|
||||
wait_nvdimm_bus_probe_idle(dev);
|
||||
rc = __holder_class_store(dev, buf);
|
||||
|
|
@ -1549,7 +1549,7 @@ static ssize_t holder_class_store(struct device *dev,
|
|||
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);
|
||||
nd_device_unlock(dev);
|
||||
|
||||
return rc < 0 ? rc : len;
|
||||
}
|
||||
|
|
@ -1560,7 +1560,7 @@ static ssize_t holder_class_show(struct device *dev,
|
|||
struct nd_namespace_common *ndns = to_ndns(dev);
|
||||
ssize_t rc;
|
||||
|
||||
device_lock(dev);
|
||||
nd_device_lock(dev);
|
||||
if (ndns->claim_class == NVDIMM_CCLASS_NONE)
|
||||
rc = sprintf(buf, "\n");
|
||||
else if ((ndns->claim_class == NVDIMM_CCLASS_BTT) ||
|
||||
|
|
@ -1572,7 +1572,7 @@ static ssize_t holder_class_show(struct device *dev,
|
|||
rc = sprintf(buf, "dax\n");
|
||||
else
|
||||
rc = sprintf(buf, "<unknown>\n");
|
||||
device_unlock(dev);
|
||||
nd_device_unlock(dev);
|
||||
|
||||
return rc;
|
||||
}
|
||||
|
|
@ -1586,7 +1586,7 @@ static ssize_t mode_show(struct device *dev,
|
|||
char *mode;
|
||||
ssize_t rc;
|
||||
|
||||
device_lock(dev);
|
||||
nd_device_lock(dev);
|
||||
claim = ndns->claim;
|
||||
if (claim && is_nd_btt(claim))
|
||||
mode = "safe";
|
||||
|
|
@ -1599,7 +1599,7 @@ static ssize_t mode_show(struct device *dev,
|
|||
else
|
||||
mode = "raw";
|
||||
rc = sprintf(buf, "%s\n", mode);
|
||||
device_unlock(dev);
|
||||
nd_device_unlock(dev);
|
||||
|
||||
return rc;
|
||||
}
|
||||
|
|
@ -1703,8 +1703,8 @@ struct nd_namespace_common *nvdimm_namespace_common_probe(struct device *dev)
|
|||
* Flush any in-progess probes / removals in the driver
|
||||
* for the raw personality of this namespace.
|
||||
*/
|
||||
device_lock(&ndns->dev);
|
||||
device_unlock(&ndns->dev);
|
||||
nd_device_lock(&ndns->dev);
|
||||
nd_device_unlock(&ndns->dev);
|
||||
if (ndns->dev.driver) {
|
||||
dev_dbg(&ndns->dev, "is active, can't bind %s\n",
|
||||
dev_name(dev));
|
||||
|
|
|
|||
|
|
@ -9,6 +9,7 @@
|
|||
#include <linux/sizes.h>
|
||||
#include <linux/mutex.h>
|
||||
#include <linux/nd.h>
|
||||
#include "nd.h"
|
||||
|
||||
extern struct list_head nvdimm_bus_list;
|
||||
extern struct mutex nvdimm_bus_list_mutex;
|
||||
|
|
@ -182,4 +183,71 @@ ssize_t nd_namespace_store(struct device *dev,
|
|||
struct nd_namespace_common **_ndns, const char *buf,
|
||||
size_t len);
|
||||
struct nd_pfn *to_nd_pfn_safe(struct device *dev);
|
||||
bool is_nvdimm_bus(struct device *dev);
|
||||
|
||||
#ifdef CONFIG_PROVE_LOCKING
|
||||
extern struct class *nd_class;
|
||||
|
||||
enum {
|
||||
LOCK_BUS,
|
||||
LOCK_NDCTL,
|
||||
LOCK_REGION,
|
||||
LOCK_DIMM = LOCK_REGION,
|
||||
LOCK_NAMESPACE,
|
||||
LOCK_CLAIM,
|
||||
};
|
||||
|
||||
static inline void debug_nvdimm_lock(struct device *dev)
|
||||
{
|
||||
if (is_nd_region(dev))
|
||||
mutex_lock_nested(&dev->lockdep_mutex, LOCK_REGION);
|
||||
else if (is_nvdimm(dev))
|
||||
mutex_lock_nested(&dev->lockdep_mutex, LOCK_DIMM);
|
||||
else if (is_nd_btt(dev) || is_nd_pfn(dev) || is_nd_dax(dev))
|
||||
mutex_lock_nested(&dev->lockdep_mutex, LOCK_CLAIM);
|
||||
else if (dev->parent && (is_nd_region(dev->parent)))
|
||||
mutex_lock_nested(&dev->lockdep_mutex, LOCK_NAMESPACE);
|
||||
else if (is_nvdimm_bus(dev))
|
||||
mutex_lock_nested(&dev->lockdep_mutex, LOCK_BUS);
|
||||
else if (dev->class && dev->class == nd_class)
|
||||
mutex_lock_nested(&dev->lockdep_mutex, LOCK_NDCTL);
|
||||
else
|
||||
dev_WARN(dev, "unknown lock level\n");
|
||||
}
|
||||
|
||||
static inline void debug_nvdimm_unlock(struct device *dev)
|
||||
{
|
||||
mutex_unlock(&dev->lockdep_mutex);
|
||||
}
|
||||
|
||||
static inline void nd_device_lock(struct device *dev)
|
||||
{
|
||||
device_lock(dev);
|
||||
debug_nvdimm_lock(dev);
|
||||
}
|
||||
|
||||
static inline void nd_device_unlock(struct device *dev)
|
||||
{
|
||||
debug_nvdimm_unlock(dev);
|
||||
device_unlock(dev);
|
||||
}
|
||||
#else
|
||||
static inline void nd_device_lock(struct device *dev)
|
||||
{
|
||||
device_lock(dev);
|
||||
}
|
||||
|
||||
static inline void nd_device_unlock(struct device *dev)
|
||||
{
|
||||
device_unlock(dev);
|
||||
}
|
||||
|
||||
static inline void debug_nvdimm_lock(struct device *dev)
|
||||
{
|
||||
}
|
||||
|
||||
static inline void debug_nvdimm_unlock(struct device *dev)
|
||||
{
|
||||
}
|
||||
#endif
|
||||
#endif /* __ND_CORE_H__ */
|
||||
|
|
|
|||
|
|
@ -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;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -520,8 +520,8 @@ static int nd_pmem_remove(struct device *dev)
|
|||
nvdimm_namespace_detach_btt(to_nd_btt(dev));
|
||||
else {
|
||||
/*
|
||||
* Note, this assumes device_lock() context to not race
|
||||
* nd_pmem_notify()
|
||||
* Note, this assumes nd_device_lock() context to not
|
||||
* race nd_pmem_notify()
|
||||
*/
|
||||
sysfs_put(pmem->bb_state);
|
||||
pmem->bb_state = NULL;
|
||||
|
|
|
|||
|
|
@ -102,7 +102,7 @@ static int nd_region_remove(struct device *dev)
|
|||
nvdimm_bus_unlock(dev);
|
||||
|
||||
/*
|
||||
* Note, this assumes device_lock() context to not race
|
||||
* Note, this assumes nd_device_lock() context to not race
|
||||
* nd_region_notify()
|
||||
*/
|
||||
sysfs_put(nd_region->bb_state);
|
||||
|
|
|
|||
|
|
@ -329,7 +329,7 @@ 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);
|
||||
nd_device_lock(dev);
|
||||
nvdimm_bus_lock(dev);
|
||||
wait_nvdimm_bus_probe_idle(dev);
|
||||
if (nd_region->ndr_mappings) {
|
||||
|
|
@ -346,7 +346,7 @@ static ssize_t set_cookie_show(struct device *dev,
|
|||
}
|
||||
}
|
||||
nvdimm_bus_unlock(dev);
|
||||
device_unlock(dev);
|
||||
nd_device_unlock(dev);
|
||||
|
||||
if (rc)
|
||||
return rc;
|
||||
|
|
@ -422,12 +422,12 @@ 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);
|
||||
nd_device_lock(dev);
|
||||
nvdimm_bus_lock(dev);
|
||||
wait_nvdimm_bus_probe_idle(dev);
|
||||
available = nd_region_available_dpa(nd_region);
|
||||
nvdimm_bus_unlock(dev);
|
||||
device_unlock(dev);
|
||||
nd_device_unlock(dev);
|
||||
|
||||
return sprintf(buf, "%llu\n", available);
|
||||
}
|
||||
|
|
@ -439,12 +439,12 @@ static ssize_t max_available_extent_show(struct device *dev,
|
|||
struct nd_region *nd_region = to_nd_region(dev);
|
||||
unsigned long long available = 0;
|
||||
|
||||
device_lock(dev);
|
||||
nd_device_lock(dev);
|
||||
nvdimm_bus_lock(dev);
|
||||
wait_nvdimm_bus_probe_idle(dev);
|
||||
available = nd_region_allocatable_dpa(nd_region);
|
||||
nvdimm_bus_unlock(dev);
|
||||
device_unlock(dev);
|
||||
nd_device_unlock(dev);
|
||||
|
||||
return sprintf(buf, "%llu\n", available);
|
||||
}
|
||||
|
|
@ -563,12 +563,12 @@ static ssize_t region_badblocks_show(struct device *dev,
|
|||
struct nd_region *nd_region = to_nd_region(dev);
|
||||
ssize_t rc;
|
||||
|
||||
device_lock(dev);
|
||||
nd_device_lock(dev);
|
||||
if (dev->driver)
|
||||
rc = badblocks_show(&nd_region->bb, buf, 0);
|
||||
else
|
||||
rc = -ENXIO;
|
||||
device_unlock(dev);
|
||||
nd_device_unlock(dev);
|
||||
|
||||
return rc;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -909,6 +909,8 @@ struct dev_links_info {
|
|||
* This identifies the device type and carries type-specific
|
||||
* information.
|
||||
* @mutex: Mutex to synchronize calls to its driver.
|
||||
* @lockdep_mutex: An optional debug lock that a subsystem can use as a
|
||||
* peer lock to gain localized lockdep coverage of the device_lock.
|
||||
* @bus: Type of bus device is on.
|
||||
* @driver: Which driver has allocated this
|
||||
* @platform_data: Platform data specific to the device.
|
||||
|
|
@ -991,6 +993,9 @@ struct device {
|
|||
core doesn't touch it */
|
||||
void *driver_data; /* Driver data, set and get with
|
||||
dev_set_drvdata/dev_get_drvdata */
|
||||
#ifdef CONFIG_PROVE_LOCKING
|
||||
struct mutex lockdep_mutex;
|
||||
#endif
|
||||
struct mutex mutex; /* mutex to synchronize calls to
|
||||
* its driver.
|
||||
*/
|
||||
|
|
|
|||
Loading…
Reference in New Issue