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nfit, tools/testing/nvdimm/: unify shutdown paths 

While testing the new on-demand ARS patches we discovered that
differences between the nfit_test and normal nfit driver shutdown paths
can leak resources.  Unify the shutdown paths to trigger via a devm_
callback when the acpi_desc->dev is unbound from its driver.

Reviewed-by: Lee, Chun-Yi <jlee@suse.com>
Reported-by: Vishal Verma <vishal.l.verma@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dan Williams 2016-07-21 18:05:36 -07:00
parent bc9775d869
commit 58cd71b474
2 changed files with 24 additions and 28 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

36
drivers/acpi/nfit.c
View File

@ -2291,6 +2291,16 @@ static int acpi_nfit_check_deletions(struct acpi_nfit_desc *acpi_desc,
return 0;
}
static void acpi_nfit_destruct(void *data)
{
struct acpi_nfit_desc *acpi_desc = data;
acpi_desc->cancel = 1;
flush_workqueue(nfit_wq);
nvdimm_bus_unregister(acpi_desc->nvdimm_bus);
acpi_desc->nvdimm_bus = NULL;
}
int acpi_nfit_init(struct acpi_nfit_desc *acpi_desc, void *data, acpi_size sz)
{
struct device *dev = acpi_desc->dev;
@ -2298,6 +2308,17 @@ int acpi_nfit_init(struct acpi_nfit_desc *acpi_desc, void *data, acpi_size sz)
const void *end;
int rc;
if (!acpi_desc->nvdimm_bus) {
acpi_desc->nvdimm_bus = nvdimm_bus_register(dev,
&acpi_desc->nd_desc);
if (!acpi_desc->nvdimm_bus)
return -ENOMEM;
rc = devm_add_action_or_reset(dev, acpi_nfit_destruct,
acpi_desc);
if (rc)
return rc;
}
mutex_lock(&acpi_desc->init_mutex);
INIT_LIST_HEAD(&prev.spas);
@ -2456,9 +2477,6 @@ static int acpi_nfit_add(struct acpi_device *adev)
if (!acpi_desc)
return -ENOMEM;
acpi_nfit_desc_init(acpi_desc, &adev->dev);
acpi_desc->nvdimm_bus = nvdimm_bus_register(dev, &acpi_desc->nd_desc);
if (!acpi_desc->nvdimm_bus)
return -ENOMEM;
/* Save the acpi header for exporting the revision via sysfs */
acpi_desc->acpi_header = *tbl;
@ -2480,19 +2498,12 @@ static int acpi_nfit_add(struct acpi_device *adev)
rc = acpi_nfit_init(acpi_desc, (void *) tbl
+ sizeof(struct acpi_table_nfit),
sz - sizeof(struct acpi_table_nfit));
if (rc)
nvdimm_bus_unregister(acpi_desc->nvdimm_bus);
return rc;
}
static int acpi_nfit_remove(struct acpi_device *adev)
{
struct acpi_nfit_desc *acpi_desc = dev_get_drvdata(&adev->dev);
acpi_desc->cancel = 1;
flush_workqueue(nfit_wq);
nvdimm_bus_unregister(acpi_desc->nvdimm_bus);
/* see acpi_nfit_destruct */
return 0;
}
@ -2519,9 +2530,6 @@ static void acpi_nfit_notify(struct acpi_device *adev, u32 event)
if (!acpi_desc)
goto out_unlock;
acpi_nfit_desc_init(acpi_desc, &adev->dev);
acpi_desc->nvdimm_bus = nvdimm_bus_register(dev, &acpi_desc->nd_desc);
if (!acpi_desc->nvdimm_bus)
goto out_unlock;
} else {
/*
* Finish previous registration before considering new

16
tools/testing/nvdimm/test/nfit.c
View File

@ -1465,16 +1465,11 @@ static int nfit_test_probe(struct platform_device *pdev)
nd_desc->provider_name = NULL;
nd_desc->module = THIS_MODULE;
nd_desc->ndctl = nfit_test_ctl;
acpi_desc->nvdimm_bus = nvdimm_bus_register(&pdev->dev, nd_desc);
if (!acpi_desc->nvdimm_bus)
return -ENXIO;
rc = acpi_nfit_init(acpi_desc, nfit_test->nfit_buf,
nfit_test->nfit_size);
if (rc) {
nvdimm_bus_unregister(acpi_desc->nvdimm_bus);
if (rc)
return rc;
}
if (nfit_test->setup != nfit_test0_setup)
return 0;
@ -1484,21 +1479,14 @@ static int nfit_test_probe(struct platform_device *pdev)
rc = acpi_nfit_init(acpi_desc, nfit_test->nfit_buf,
nfit_test->nfit_size);
if (rc) {
nvdimm_bus_unregister(acpi_desc->nvdimm_bus);
if (rc)
return rc;
}
return 0;
}
static int nfit_test_remove(struct platform_device *pdev)
{
struct nfit_test *nfit_test = to_nfit_test(&pdev->dev);
struct acpi_nfit_desc *acpi_desc = &nfit_test->acpi_desc;
nvdimm_bus_unregister(acpi_desc->nvdimm_bus);
return 0;
}