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| author | Dan Williams <dan.j.williams@intel.com> | 2015-04-25 03:56:17 -0400 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2015-06-24 21:24:10 -0400 |
| commit | e6dfb2de47768efe8cc37c9a1863d2aff81440fb (patch) | |
| tree | a1ad89328d88a37195f23ca9421071fc29e6722f /drivers/nvdimm/bus.c | |
| parent | 45def22c1fab85764646746ce38d45b2f3281fa5 (diff) | |
| download | linux-e6dfb2de47768efe8cc37c9a1863d2aff81440fb.tar.bz2 | |
libnvdimm, nfit: dimm/memory-devices
Enable nvdimm devices to be registered on a nvdimm_bus. The kernel
assigned device id for nvdimm devicesis dynamic. If userspace needs a
more static identifier it should consult a provider-specific attribute.
In the case where NFIT is the provider, the 'nmemX/nfit/handle' or
'nmemX/nfit/serial' attributes may be used for this purpose.
Cc: Neil Brown <neilb@suse.de>
Cc: <linux-acpi@vger.kernel.org>
Cc: Greg KH <gregkh@linuxfoundation.org>
Cc: Robert Moore <robert.moore@intel.com>
Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Christoph Hellwig <hch@lst.de>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Toshi Kani <toshi.kani@hp.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/nvdimm/bus.c')
| -rw-r--r-- | drivers/nvdimm/bus.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/drivers/nvdimm/bus.c b/drivers/nvdimm/bus.c index 3f7c690a5d0c..a8802577fb55 100644 --- a/drivers/nvdimm/bus.c +++ b/drivers/nvdimm/bus.c @@ -13,6 +13,7 @@ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include <linux/uaccess.h> #include <linux/fcntl.h> +#include <linux/async.h> #include <linux/slab.h> #include <linux/fs.h> #include <linux/io.h> @@ -21,6 +22,10 @@ static int nvdimm_bus_major; static struct class *nd_class; +struct bus_type nvdimm_bus_type = { + .name = "nd", +}; + int nvdimm_bus_create_ndctl(struct nvdimm_bus *nvdimm_bus) { dev_t devt = MKDEV(nvdimm_bus_major, nvdimm_bus->id); @@ -59,9 +64,13 @@ int __init nvdimm_bus_init(void) { int rc; + rc = bus_register(&nvdimm_bus_type); + if (rc) + return rc; + rc = register_chrdev(0, "ndctl", &nvdimm_bus_fops); if (rc < 0) - return rc; + goto err_chrdev; nvdimm_bus_major = rc; nd_class = class_create(THIS_MODULE, "nd"); @@ -72,6 +81,8 @@ int __init nvdimm_bus_init(void) err_class: unregister_chrdev(nvdimm_bus_major, "ndctl"); + err_chrdev: + bus_unregister(&nvdimm_bus_type); return rc; } @@ -80,4 +91,5 @@ void __exit nvdimm_bus_exit(void) { class_destroy(nd_class); unregister_chrdev(nvdimm_bus_major, "ndctl"); + bus_unregister(&nvdimm_bus_type); } |