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Device properties framework fixes for v4.14-rc5

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- Fix a device properties management issue, introduced during the
    4.9 cycle, that causes device properties associated with a
    parent device to go away on a removal of its child in some
    cases (Jarkko Nikula).
 
  - Fix inconsistencies in error codes returned by a new function
    helper in the device properties framework depending on the
    underlying low-level firmware interface, DT or ACPI, by making the
    meaning of error codes returned in the ACPI case agree with the
    meaning of DT error codes in analogous situations (Sakari Ailus).
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Merge tag 'devprop-4.14-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull device properties framework fixes from Rafael Wysocki:
 "These fix an issue related to device removal introduced during the 4.9
  cycle and fix up new functionality added recently.

  Specifics:

   - Fix a device properties management issue, introduced during the 4.9
     cycle, that causes device properties associated with a parent
     device to go away on a removal of its child in some cases (Jarkko
     Nikula).

   - Fix inconsistencies in error codes returned by a new function
     helper in the device properties framework depending on the
     underlying low-level firmware interface, DT or ACPI, by making the
     meaning of error codes returned in the ACPI case agree with the
     meaning of DT error codes in analogous situations (Sakari Ailus)"

* tag 'devprop-4.14-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPI: properties: Fix __acpi_node_get_property_reference() return codes
  ACPI: properties: Align return codes of __acpi_node_get_property_reference()
  device property: Track owner device of device property
This commit is contained in:
Linus Torvalds 2017-10-12 17:37:23 -07:00
commit 3d7882769b
2 changed files with 28 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
drivers/acpi/property.c
View File

@ -571,10 +571,9 @@ static int acpi_data_get_property_array(const struct acpi_device_data *data,
* }
* }
*
* Calling this function with index %2 return %-ENOENT and with index %3
* returns the last entry. If the property does not contain any more values
* %-ENODATA is returned. The NULL entry must be single integer and
* preferably contain value %0.
* Calling this function with index %2 or index %3 return %-ENOENT. If the
* property does not contain any more values %-ENOENT is returned. The NULL
* entry must be single integer and preferably contain value %0.
*
* Return: %0 on success, negative error code on failure.
*/
@ -590,11 +589,11 @@ int __acpi_node_get_property_reference(const struct fwnode_handle *fwnode,
data = acpi_device_data_of_node(fwnode);
if (!data)
return -EINVAL;
return -ENOENT;
ret = acpi_data_get_property(data, propname, ACPI_TYPE_ANY, &obj);
if (ret)
return ret;
return ret == -EINVAL ? -ENOENT : -EINVAL;
/*
* The simplest case is when the value is a single reference. Just
@ -606,7 +605,7 @@ int __acpi_node_get_property_reference(const struct fwnode_handle *fwnode,
ret = acpi_bus_get_device(obj->reference.handle, &device);
if (ret)
return ret;
return ret == -ENODEV ? -EINVAL : ret;
args->adev = device;
args->nargs = 0;
@ -622,8 +621,10 @@ int __acpi_node_get_property_reference(const struct fwnode_handle *fwnode,
* The index argument is then used to determine which reference
* the caller wants (along with the arguments).
*/
if (obj->type != ACPI_TYPE_PACKAGE || index >= obj->package.count)
return -EPROTO;
if (obj->type != ACPI_TYPE_PACKAGE)
return -EINVAL;
if (index >= obj->package.count)
return -ENOENT;
element = obj->package.elements;
end = element + obj->package.count;
@ -635,7 +636,7 @@ int __acpi_node_get_property_reference(const struct fwnode_handle *fwnode,
ret = acpi_bus_get_device(element->reference.handle,
&device);
if (ret)
return -ENODEV;
return -EINVAL;
nargs = 0;
element++;
@ -649,11 +650,11 @@ int __acpi_node_get_property_reference(const struct fwnode_handle *fwnode,
else if (type == ACPI_TYPE_LOCAL_REFERENCE)
break;
else
return -EPROTO;
return -EINVAL;
}
if (nargs > MAX_ACPI_REFERENCE_ARGS)
return -EPROTO;
return -EINVAL;
if (idx == index) {
args->adev = device;
@ -670,13 +671,13 @@ int __acpi_node_get_property_reference(const struct fwnode_handle *fwnode,
return -ENOENT;
element++;
} else {
return -EPROTO;
return -EINVAL;
}
idx++;
}
return -ENODATA;
return -ENOENT;
}
EXPORT_SYMBOL_GPL(__acpi_node_get_property_reference);

19
drivers/base/property.c
View File

@ -21,6 +21,7 @@
#include <linux/phy.h>
struct property_set {
struct device *dev;
struct fwnode_handle fwnode;
const struct property_entry *properties;
};
@ -682,6 +683,10 @@ EXPORT_SYMBOL_GPL(fwnode_property_match_string);
* Caller is responsible to call fwnode_handle_put() on the returned
* args->fwnode pointer.
*
* Returns: %0 on success
* %-ENOENT when the index is out of bounds, the index has an empty
* reference or the property was not found
* %-EINVAL on parse error
*/
int fwnode_property_get_reference_args(const struct fwnode_handle *fwnode,
const char *prop, const char *nargs_prop,
@ -891,6 +896,7 @@ static struct property_set *pset_copy_set(const struct property_set *pset)
void device_remove_properties(struct device *dev)
{
struct fwnode_handle *fwnode;
struct property_set *pset;
fwnode = dev_fwnode(dev);
if (!fwnode)
@ -900,16 +906,16 @@ void device_remove_properties(struct device *dev)
* the pset. If there is no real firmware node (ACPI/DT) primary
* will hold the pset.
*/
if (is_pset_node(fwnode)) {
pset = to_pset_node(fwnode);
if (pset) {
set_primary_fwnode(dev, NULL);
pset_free_set(to_pset_node(fwnode));
} else {
fwnode = fwnode->secondary;
if (!IS_ERR(fwnode) && is_pset_node(fwnode)) {
pset = to_pset_node(fwnode->secondary);
if (pset && dev == pset->dev)
set_secondary_fwnode(dev, NULL);
pset_free_set(to_pset_node(fwnode));
}
}
if (pset && dev == pset->dev)
pset_free_set(pset);
}
EXPORT_SYMBOL_GPL(device_remove_properties);
@ -938,6 +944,7 @@ int device_add_properties(struct device *dev,
p->fwnode.ops = &pset_fwnode_ops;
set_secondary_fwnode(dev, &p->fwnode);
p->dev = dev;
return 0;
}
EXPORT_SYMBOL_GPL(device_add_properties);