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Power management and ACPI fixes for final v4.5

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- Revert a recent ACPICA commit that has been reverted
    upstream, because it caused problems to happen on user
    systems and the problem it attempted to address will not be
    relevant any more after upcoming ACPI specification changes
    (Bob Moore).
 
  - Fix crash in the generic device properties framework introduced
    by a recent change that forgot to check pointers against error
    values in addition to checking them against NULL (Heikki Krogerus).
 
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Merge tag 'pm+acpi-4.5-final' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management and ACPI fixes from Rafael Wysocki:
 "Two more fixes for issues introduced recently, one in the generic
  device properties framework and one in ACPICA.

  Specifics:

   - Revert a recent ACPICA commit that has been reverted upstream,
     because it caused problems to happen on user systems and the
     problem it attempted to address will not be relevant any more after
     upcoming ACPI specification changes (Bob Moore).

   - Fix crash in the generic device properties framework introduced by
     a recent change that forgot to check pointers against error values
     in addition to checking them against NULL (Heikki Krogerus)"

* tag 'pm+acpi-4.5-final' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  device property: fwnode->secondary may contain ERR_PTR(-ENODEV)
  ACPICA: Revert "Parser: Fix for SuperName method invocation"
This commit is contained in:
Linus Torvalds 2016-03-11 10:45:03 -08:00
commit 7ae9c768e1
2 changed files with 8 additions and 9 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

9
drivers/acpi/acpica/psargs.c
View file

@ -269,8 +269,7 @@ acpi_ps_get_next_namepath(struct acpi_walk_state *walk_state,
*/
if (ACPI_SUCCESS(status) &&
possible_method_call && (node->type == ACPI_TYPE_METHOD)) {
if (GET_CURRENT_ARG_TYPE(walk_state->arg_types) ==
ARGP_SUPERNAME) {
if (walk_state->opcode == AML_UNLOAD_OP) {
/*
* acpi_ps_get_next_namestring has increased the AML pointer,
* so we need to restore the saved AML pointer for method call.
@ -697,7 +696,7 @@ static union acpi_parse_object *acpi_ps_get_next_field(struct acpi_parse_state
*
* PARAMETERS: walk_state - Current state
* parser_state - Current parser state object
* arg_type - The parser argument type (ARGP_*)
* arg_type - The argument type (AML_*_ARG)
* return_arg - Where the next arg is returned
*
* RETURN: Status, and an op object containing the next argument.
@ -817,9 +816,9 @@ acpi_ps_get_next_arg(struct acpi_walk_state *walk_state,
return_ACPI_STATUS(AE_NO_MEMORY);
}
/* super_name allows argument to be a method call */
/* To support super_name arg of Unload */
if (arg_type == ARGP_SUPERNAME) {
if (walk_state->opcode == AML_UNLOAD_OP) {
status =
acpi_ps_get_next_namepath(walk_state,
parser_state, arg,

8
drivers/base/property.c
View file

@ -218,7 +218,7 @@ bool fwnode_property_present(struct fwnode_handle *fwnode, const char *propname)
bool ret;
ret = __fwnode_property_present(fwnode, propname);
if (ret == false && fwnode && fwnode->secondary)
if (ret == false && fwnode && !IS_ERR_OR_NULL(fwnode->secondary))
ret = __fwnode_property_present(fwnode->secondary, propname);
return ret;
}
@ -423,7 +423,7 @@ EXPORT_SYMBOL_GPL(device_property_match_string);
int _ret_; \
_ret_ = FWNODE_PROP_READ(_fwnode_, _propname_, _type_, _proptype_, \
_val_, _nval_); \
if (_ret_ == -EINVAL && _fwnode_ && _fwnode_->secondary) \
if (_ret_ == -EINVAL && _fwnode_ && !IS_ERR_OR_NULL(_fwnode_->secondary)) \
_ret_ = FWNODE_PROP_READ(_fwnode_->secondary, _propname_, _type_, \
_proptype_, _val_, _nval_); \
_ret_; \
@ -593,7 +593,7 @@ int fwnode_property_read_string_array(struct fwnode_handle *fwnode,
int ret;
ret = __fwnode_property_read_string_array(fwnode, propname, val, nval);
if (ret == -EINVAL && fwnode && fwnode->secondary)
if (ret == -EINVAL && fwnode && !IS_ERR_OR_NULL(fwnode->secondary))
ret = __fwnode_property_read_string_array(fwnode->secondary,
propname, val, nval);
return ret;
@ -621,7 +621,7 @@ int fwnode_property_read_string(struct fwnode_handle *fwnode,
int ret;
ret = __fwnode_property_read_string(fwnode, propname, val);
if (ret == -EINVAL && fwnode && fwnode->secondary)
if (ret == -EINVAL && fwnode && !IS_ERR_OR_NULL(fwnode->secondary))
ret = __fwnode_property_read_string(fwnode->secondary,
propname, val);
return ret;