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Device properties framework update for 4.18-rc1

Browse source 
Modify the device properties framework to remove union aliasing
 from it (Andy Shevchenko).
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Merge tag 'dp-4.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull device properties framework update from Rafael Wysocki:
 "Modify the device properties framework to remove union aliasing from
  it (Andy Shevchenko)"

* tag 'dp-4.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  device property: Get rid of union aliasing
This commit is contained in:
Linus Torvalds 2018-06-05 10:13:13 -07:00
commit a74e0c4c9c
3 changed files with 117 additions and 47 deletions
Download patch file Download diff file Expand all files Collapse all files

104
drivers/base/property.c
View file

@ -56,6 +56,72 @@ pset_prop_get(const struct property_set *pset, const char *name)
return NULL;
}
static const void *property_get_pointer(const struct property_entry *prop)
{
switch (prop->type) {
case DEV_PROP_U8:
if (prop->is_array)
return prop->pointer.u8_data;
return &prop->value.u8_data;
case DEV_PROP_U16:
if (prop->is_array)
return prop->pointer.u16_data;
return &prop->value.u16_data;
case DEV_PROP_U32:
if (prop->is_array)
return prop->pointer.u32_data;
return &prop->value.u32_data;
case DEV_PROP_U64:
if (prop->is_array)
return prop->pointer.u64_data;
return &prop->value.u64_data;
case DEV_PROP_STRING:
if (prop->is_array)
return prop->pointer.str;
return &prop->value.str;
default:
return NULL;
}
}
static void property_set_pointer(struct property_entry *prop, const void *pointer)
{
switch (prop->type) {
case DEV_PROP_U8:
if (prop->is_array)
prop->pointer.u8_data = pointer;
else
prop->value.u8_data = *((u8 *)pointer);
break;
case DEV_PROP_U16:
if (prop->is_array)
prop->pointer.u16_data = pointer;
else
prop->value.u16_data = *((u16 *)pointer);
break;
case DEV_PROP_U32:
if (prop->is_array)
prop->pointer.u32_data = pointer;
else
prop->value.u32_data = *((u32 *)pointer);
break;
case DEV_PROP_U64:
if (prop->is_array)
prop->pointer.u64_data = pointer;
else
prop->value.u64_data = *((u64 *)pointer);
break;
case DEV_PROP_STRING:
if (prop->is_array)
prop->pointer.str = pointer;
else
prop->value.str = pointer;
break;
default:
break;
}
}
static const void *pset_prop_find(const struct property_set *pset,
const char *propname, size_t length)
{
@ -65,10 +131,7 @@ static const void *pset_prop_find(const struct property_set *pset,
prop = pset_prop_get(pset, propname);
if (!prop)
return ERR_PTR(-EINVAL);
if (prop->is_array)
pointer = prop->pointer.raw_data;
else
pointer = &prop->value.raw_data;
pointer = property_get_pointer(prop);
if (!pointer)
return ERR_PTR(-ENODATA);
if (length > prop->length)
@ -698,16 +761,17 @@ EXPORT_SYMBOL_GPL(fwnode_property_get_reference_args);
static void property_entry_free_data(const struct property_entry *p)
{
const void *pointer = property_get_pointer(p);
size_t i, nval;
if (p->is_array) {
if (p->is_string && p->pointer.str) {
if (p->type == DEV_PROP_STRING && p->pointer.str) {
nval = p->length / sizeof(const char *);
for (i = 0; i < nval; i++)
kfree(p->pointer.str[i]);
}
kfree(p->pointer.raw_data);
} else if (p->is_string) {
kfree(pointer);
} else if (p->type == DEV_PROP_STRING) {
kfree(p->value.str);
}
kfree(p->name);
@ -716,7 +780,7 @@ static void property_entry_free_data(const struct property_entry *p)
static int property_copy_string_array(struct property_entry *dst,
const struct property_entry *src)
{
char **d;
const char **d;
size_t nval = src->length / sizeof(*d);
int i;
@ -734,40 +798,44 @@ static int property_copy_string_array(struct property_entry *dst,
}
}
dst->pointer.raw_data = d;
dst->pointer.str = d;
return 0;
}
static int property_entry_copy_data(struct property_entry *dst,
const struct property_entry *src)
{
const void *pointer = property_get_pointer(src);
const void *new;
int error;
if (src->is_array) {
if (!src->length)
return -ENODATA;
if (src->is_string) {
if (src->type == DEV_PROP_STRING) {
error = property_copy_string_array(dst, src);
if (error)
return error;
new = dst->pointer.str;
} else {
dst->pointer.raw_data = kmemdup(src->pointer.raw_data,
src->length, GFP_KERNEL);
if (!dst->pointer.raw_data)
new = kmemdup(pointer, src->length, GFP_KERNEL);
if (!new)
return -ENOMEM;
}
} else if (src->is_string) {
dst->value.str = kstrdup(src->value.str, GFP_KERNEL);
if (!dst->value.str && src->value.str)
} else if (src->type == DEV_PROP_STRING) {
new = kstrdup(src->value.str, GFP_KERNEL);
if (!new && src->value.str)
return -ENOMEM;
} else {
dst->value.raw_data = src->value.raw_data;
new = pointer;
}
dst->length = src->length;
dst->is_array = src->is_array;
dst->is_string = src->is_string;
dst->type = src->type;
property_set_pointer(dst, new);
dst->name = kstrdup(src->name, GFP_KERNEL);
if (!dst->name)