mirror of
https://github.com/torvalds/linux.git
synced 2024-11-27 14:41:39 +00:00
1f97507463
All drivers return 0 in their remove callback and the driver core ignores the return value of nvdimm_bus_remove() anyhow. So simplify by changing the driver remove callback to return void and return 0 unconditionally to the upper layer. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Link: https://lore.kernel.org/r/20210212171043.2136580-2-u.kleine-koenig@pengutronix.de Signed-off-by: Dan Williams <dan.j.williams@intel.com>
146 lines
3.1 KiB
C
146 lines
3.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Copyright(c) 2013-2015 Intel Corporation. All rights reserved.
|
|
*/
|
|
#include <linux/vmalloc.h>
|
|
#include <linux/module.h>
|
|
#include <linux/device.h>
|
|
#include <linux/sizes.h>
|
|
#include <linux/ndctl.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/nd.h>
|
|
#include "label.h"
|
|
#include "nd.h"
|
|
|
|
static int nvdimm_probe(struct device *dev)
|
|
{
|
|
struct nvdimm_drvdata *ndd;
|
|
int rc;
|
|
|
|
rc = nvdimm_security_setup_events(dev);
|
|
if (rc < 0) {
|
|
dev_err(dev, "security event setup failed: %d\n", rc);
|
|
return rc;
|
|
}
|
|
|
|
rc = nvdimm_check_config_data(dev);
|
|
if (rc) {
|
|
/* not required for non-aliased nvdimm, ex. NVDIMM-N */
|
|
if (rc == -ENOTTY)
|
|
rc = 0;
|
|
return rc;
|
|
}
|
|
|
|
/*
|
|
* The locked status bit reflects explicit status codes from the
|
|
* label reading commands, revalidate it each time the driver is
|
|
* activated and re-reads the label area.
|
|
*/
|
|
nvdimm_clear_locked(dev);
|
|
|
|
ndd = kzalloc(sizeof(*ndd), GFP_KERNEL);
|
|
if (!ndd)
|
|
return -ENOMEM;
|
|
|
|
dev_set_drvdata(dev, ndd);
|
|
ndd->dpa.name = dev_name(dev);
|
|
ndd->ns_current = -1;
|
|
ndd->ns_next = -1;
|
|
ndd->dpa.start = 0;
|
|
ndd->dpa.end = -1;
|
|
ndd->dev = dev;
|
|
get_device(dev);
|
|
kref_init(&ndd->kref);
|
|
|
|
/*
|
|
* Attempt to unlock, if the DIMM supports security commands,
|
|
* otherwise the locked indication is determined by explicit
|
|
* status codes from the label reading commands.
|
|
*/
|
|
rc = nvdimm_security_unlock(dev);
|
|
if (rc < 0)
|
|
dev_dbg(dev, "failed to unlock dimm: %d\n", rc);
|
|
|
|
|
|
/*
|
|
* EACCES failures reading the namespace label-area-properties
|
|
* are interpreted as the DIMM capacity being locked but the
|
|
* namespace labels themselves being accessible.
|
|
*/
|
|
rc = nvdimm_init_nsarea(ndd);
|
|
if (rc == -EACCES) {
|
|
/*
|
|
* See nvdimm_namespace_common_probe() where we fail to
|
|
* allow namespaces to probe while the DIMM is locked,
|
|
* but we do allow for namespace enumeration.
|
|
*/
|
|
nvdimm_set_locked(dev);
|
|
rc = 0;
|
|
}
|
|
if (rc)
|
|
goto err;
|
|
|
|
/*
|
|
* EACCES failures reading the namespace label-data are
|
|
* interpreted as the label area being locked in addition to the
|
|
* DIMM capacity. We fail the dimm probe to prevent regions from
|
|
* attempting to parse the label area.
|
|
*/
|
|
rc = nd_label_data_init(ndd);
|
|
if (rc == -EACCES)
|
|
nvdimm_set_locked(dev);
|
|
if (rc)
|
|
goto err;
|
|
|
|
dev_dbg(dev, "config data size: %d\n", ndd->nsarea.config_size);
|
|
|
|
nvdimm_bus_lock(dev);
|
|
if (ndd->ns_current >= 0) {
|
|
rc = nd_label_reserve_dpa(ndd);
|
|
if (rc == 0)
|
|
nvdimm_set_labeling(dev);
|
|
}
|
|
nvdimm_bus_unlock(dev);
|
|
|
|
if (rc)
|
|
goto err;
|
|
|
|
return 0;
|
|
|
|
err:
|
|
put_ndd(ndd);
|
|
return rc;
|
|
}
|
|
|
|
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);
|
|
put_ndd(ndd);
|
|
}
|
|
|
|
static struct nd_device_driver nvdimm_driver = {
|
|
.probe = nvdimm_probe,
|
|
.remove = nvdimm_remove,
|
|
.drv = {
|
|
.name = "nvdimm",
|
|
},
|
|
.type = ND_DRIVER_DIMM,
|
|
};
|
|
|
|
int __init nvdimm_init(void)
|
|
{
|
|
return nd_driver_register(&nvdimm_driver);
|
|
}
|
|
|
|
void nvdimm_exit(void)
|
|
{
|
|
driver_unregister(&nvdimm_driver.drv);
|
|
}
|
|
|
|
MODULE_ALIAS_ND_DEVICE(ND_DEVICE_DIMM);
|