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platform/mellanox: mlxreg-hotplug: Add environmental data to uevent 

Send "udev" event with environmental data in order to allow handling
"ENV{}" variables in "udev" rules.

Signed-off-by: Vadim Pasternak <vadimp@mellanox.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
This commit is contained in:
Vadim Pasternak 2020-07-14 15:01:57 +03:00 committed by Andy Shevchenko
parent 0a43f7be57
commit 92d020f979
1 changed files with 20 additions and 2 deletions
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22
drivers/platform/mellanox/mlxreg-hotplug.c
View File

@ -16,6 +16,7 @@
#include <linux/platform_data/mlxreg.h>
#include <linux/platform_device.h>
#include <linux/spinlock.h>
#include <linux/string_helpers.h>
#include <linux/regmap.h>
#include <linux/workqueue.h>
@ -71,6 +72,23 @@ struct mlxreg_hotplug_priv_data {
u8 not_asserted;
};
/* Environment variables array for udev. */
static char *mlxreg_hotplug_udev_envp[] = { NULL, NULL };
static int
mlxreg_hotplug_udev_event_send(struct kobject *kobj,
struct mlxreg_core_data *data, bool action)
{
char event_str[MLXREG_CORE_LABEL_MAX_SIZE + 2];
char label[MLXREG_CORE_LABEL_MAX_SIZE] = { 0 };
mlxreg_hotplug_udev_envp[0] = event_str;
string_upper(label, data->label);
snprintf(event_str, MLXREG_CORE_LABEL_MAX_SIZE, "%s=%d", label, !!action);
return kobject_uevent_env(kobj, KOBJ_CHANGE, mlxreg_hotplug_udev_envp);
}
static int mlxreg_hotplug_device_create(struct mlxreg_hotplug_priv_data *priv,
struct mlxreg_core_data *data)
{
@ -78,7 +96,7 @@ static int mlxreg_hotplug_device_create(struct mlxreg_hotplug_priv_data *priv,
struct i2c_client *client;
/* Notify user by sending hwmon uevent. */
kobject_uevent(&priv->hwmon->kobj, KOBJ_CHANGE);
mlxreg_hotplug_udev_event_send(&priv->hwmon->kobj, data, true);
/*
* Return if adapter number is negative. It could be in case hotplug
@ -118,7 +136,7 @@ mlxreg_hotplug_device_destroy(struct mlxreg_hotplug_priv_data *priv,
struct mlxreg_core_data *data)
{
/* Notify user by sending hwmon uevent. */
kobject_uevent(&priv->hwmon->kobj, KOBJ_CHANGE);
mlxreg_hotplug_udev_event_send(&priv->hwmon->kobj, data, false);
if (data->hpdev.client) {
i2c_unregister_device(data->hpdev.client);