[PATCH v5 05/14] software node: clean up property_copy_string_array()

Dmitry Torokhov
2019-10-11T23:07:36Z

Because property_copy_string_array() stores the newly allocated pointer in the
destination property, we have an awkward code in property_entry_copy_data()
where we fetch the new pointer from dst.

Let's change property_copy_string_array() to return pointer and rely on the
common path in property_entry_copy_data() to store it in destination structure.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
drivers/base/swnode.c | 19 ++++++++-----------
1 file changed, 8 insertions(+), 11 deletions(-)

diff --git a/drivers/base/swnode.c b/drivers/base/swnode.c
index a1f3f0994f9f..2f2248c9003c 100644
--- a/drivers/base/swnode.c
+++ b/drivers/base/swnode.c
@@ -337,8 +337,8 @@ static void property_entry_free_data(const struct property_entry *p)
kfree(p->name);
}

-static int property_copy_string_array(struct property_entry *dst,
- const struct property_entry *src)
+static const char * const *
+property_copy_string_array(const struct property_entry *src)
{
const char **d;
size_t nval = src->length / sizeof(*d);
@@ -346,7 +346,7 @@ static int property_copy_string_array(struct property_entry *dst,

d = kcalloc(nval, sizeof(*d), GFP_KERNEL);
if (!d)
- return -ENOMEM;
+ return NULL;

for (i = 0; i < nval; i++) {
d[i] = kstrdup(src->pointer.str[i], GFP_KERNEL);
@@ -354,12 +354,11 @@ static int property_copy_string_array(struct property_entry *dst,
while (--i >= 0)
kfree(d[i]);
kfree(d);
- return -ENOMEM;
+ return NULL;
}
}

- dst->pointer.str = d;
- return 0;
+ return d;
}

static int property_entry_copy_data(struct property_entry *dst,
@@ -367,17 +366,15 @@ static int property_entry_copy_data(struct property_entry *dst,
{
const void *pointer = property_get_pointer(src);
const void *new;
- int error;

if (src->is_array) {
if (!src->length)
return -ENODATA;

if (src->type == DEV_PROP_STRING) {
- error = property_copy_string_array(dst, src);
- if (error)
- return error;
- new = dst->pointer.str;
+ new = property_copy_string_array(src);
+ if (!new)
+ return -ENOMEM;
} else {
new = kmemdup(pointer, src->length, GFP_KERNEL);
if (!new)
--
2.23.0.700.g56cf767bdb-goog