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Device properties framework fix for v4.13-rc1

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This fixes a problem with bool properties that could be seen as
 "true" when the property was not present at all by adding a special
 helper for bool properties with checks for all of the requisute
 conditions (Sakari Ailus).
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Merge tag 'devprop-fix-4.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull device properties framework fix from Rafael Wysocki:
 "This fixes a problem with bool properties that could be seen as "true"
  when the property was not present at all by adding a special helper
  for bool properties with checks for all of the requisute conditions
  (Sakari Ailus)"

* tag 'devprop-fix-4.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  device property: Introduce fwnode_call_bool_op() for ops that return bool
This commit is contained in:
Linus Torvalds 2017-07-14 22:39:35 -07:00
commit 96d0d831a5
2 changed files with 7 additions and 3 deletions
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6
drivers/base/property.c
View File

@ -253,10 +253,10 @@ bool fwnode_property_present(struct fwnode_handle *fwnode, const char *propname)
{
bool ret;
ret = fwnode_call_int_op(fwnode, property_present, propname);
ret = fwnode_call_bool_op(fwnode, property_present, propname);
if (ret == false && !IS_ERR_OR_NULL(fwnode) &&
!IS_ERR_OR_NULL(fwnode->secondary))
ret = fwnode_call_int_op(fwnode->secondary, property_present,
ret = fwnode_call_bool_op(fwnode->secondary, property_present,
propname);
return ret;
}
@ -1027,7 +1027,7 @@ EXPORT_SYMBOL_GPL(fwnode_handle_put);
*/
bool fwnode_device_is_available(struct fwnode_handle *fwnode)
{
return fwnode_call_int_op(fwnode, device_is_available);
return fwnode_call_bool_op(fwnode, device_is_available);
}
EXPORT_SYMBOL_GPL(fwnode_device_is_available);

4
include/linux/fwnode.h
View File

@ -99,6 +99,10 @@ struct fwnode_operations {
(fwnode ? (fwnode_has_op(fwnode, op) ? \
(fwnode)->ops->op(fwnode, ## __VA_ARGS__) : -ENXIO) : \
-EINVAL)
#define fwnode_call_bool_op(fwnode, op, ...) \
(fwnode ? (fwnode_has_op(fwnode, op) ? \
(fwnode)->ops->op(fwnode, ## __VA_ARGS__) : false) : \
false)
#define fwnode_call_ptr_op(fwnode, op, ...) \
(fwnode_has_op(fwnode, op) ? \
(fwnode)->ops->op(fwnode, ## __VA_ARGS__) : NULL)