Until now the wmi-bmof driver had to allocate the binary sysfs
attribute dynamically since its size depends on the bmof buffer
returned by the firmware.
Use the new .bin_size() callback to avoid having to do this memory
allocation.
Tested on a Asus Prime B650-Plus.
Signed-off-by: Armin Wolf <W_Armin@xxxxxx>
---
drivers/platform/x86/wmi-bmof.c | 75 +++++++++++++++++----------------
1 file changed, 38 insertions(+), 37 deletions(-)
diff --git a/drivers/platform/x86/wmi-bmof.c b/drivers/platform/x86/wmi-bmof.c
index df6f0ae6e6c7..3e33da36da8a 100644
--- a/drivers/platform/x86/wmi-bmof.c
+++ b/drivers/platform/x86/wmi-bmof.c
@@ -20,66 +20,66 @@
#define WMI_BMOF_GUID "05901221-D566-11D1-B2F0-00A0C9062910"
-struct bmof_priv {
- union acpi_object *bmofdata;
- struct bin_attribute bmof_bin_attr;
-};
-
-static ssize_t read_bmof(struct file *filp, struct kobject *kobj, struct bin_attribute *attr,
+static ssize_t bmof_read(struct file *filp, struct kobject *kobj, const struct bin_attribute *attr,
char *buf, loff_t off, size_t count)
{
- struct bmof_priv *priv = container_of(attr, struct bmof_priv, bmof_bin_attr);
+ struct device *dev = kobj_to_dev(kobj);
+ union acpi_object *obj = dev_get_drvdata(dev);
- return memory_read_from_buffer(buf, count, &off, priv->bmofdata->buffer.pointer,
- priv->bmofdata->buffer.length);
+ return memory_read_from_buffer(buf, count, &off, obj->buffer.pointer, obj->buffer.length);
}
-static int wmi_bmof_probe(struct wmi_device *wdev, const void *context)
+static const BIN_ATTR_ADMIN_RO(bmof, 0);
+
+static const struct bin_attribute * const bmof_attrs[] = {
+ &bin_attr_bmof,
+ NULL
+};
+
+static size_t bmof_bin_size(struct kobject *kobj, const struct bin_attribute *attr, int n)
{
- struct bmof_priv *priv;
- int ret;
+ struct device *dev = kobj_to_dev(kobj);
+ union acpi_object *obj = dev_get_drvdata(dev);
+
+ return obj->buffer.length;
+}
- priv = devm_kzalloc(&wdev->dev, sizeof(struct bmof_priv), GFP_KERNEL);
- if (!priv)
- return -ENOMEM;
+static const struct attribute_group bmof_group = {
+ .bin_size = bmof_bin_size,
+ .bin_attrs_new = bmof_attrs,
+};
+
+static const struct attribute_group *bmof_groups[] = {
+ &bmof_group,
+ NULL
+};
- dev_set_drvdata(&wdev->dev, priv);
+static int wmi_bmof_probe(struct wmi_device *wdev, const void *context)
+{
+ union acpi_object *obj;
- priv->bmofdata = wmidev_block_query(wdev, 0);
- if (!priv->bmofdata) {
+ obj = wmidev_block_query(wdev, 0);
+ if (!obj) {
dev_err(&wdev->dev, "failed to read Binary MOF\n");
return -EIO;
}
- if (priv->bmofdata->type != ACPI_TYPE_BUFFER) {
+ if (obj->type != ACPI_TYPE_BUFFER) {
dev_err(&wdev->dev, "Binary MOF is not a buffer\n");
- ret = -EIO;
- goto err_free;
+ kfree(obj);
+ return -EIO;
}
- sysfs_bin_attr_init(&priv->bmof_bin_attr);
- priv->bmof_bin_attr.attr.name = "bmof";
- priv->bmof_bin_attr.attr.mode = 0400;
- priv->bmof_bin_attr.read = read_bmof;
- priv->bmof_bin_attr.size = priv->bmofdata->buffer.length;
-
- ret = device_create_bin_file(&wdev->dev, &priv->bmof_bin_attr);
- if (ret)
- goto err_free;
+ dev_set_drvdata(&wdev->dev, obj);
return 0;
-
- err_free:
- kfree(priv->bmofdata);
- return ret;
}
static void wmi_bmof_remove(struct wmi_device *wdev)
{
- struct bmof_priv *priv = dev_get_drvdata(&wdev->dev);
+ union acpi_object *obj = dev_get_drvdata(&wdev->dev);
- device_remove_bin_file(&wdev->dev, &priv->bmof_bin_attr);
- kfree(priv->bmofdata);
+ kfree(obj);
}
static const struct wmi_device_id wmi_bmof_id_table[] = {
@@ -90,6 +90,7 @@ static const struct wmi_device_id wmi_bmof_id_table[] = {
static struct wmi_driver wmi_bmof_driver = {
.driver = {
.name = "wmi-bmof",
+ .dev_groups = bmof_groups,
},
.probe = wmi_bmof_probe,
.remove = wmi_bmof_remove,
--
2.39.5
