iosm_ipc_uevent.c (1038B)
1// SPDX-License-Identifier: GPL-2.0-only 2/* 3 * Copyright (C) 2020-21 Intel Corporation. 4 */ 5 6#include <linux/device.h> 7#include <linux/kobject.h> 8#include <linux/slab.h> 9 10#include "iosm_ipc_uevent.h" 11 12/* Update the uevent in work queue context */ 13static void ipc_uevent_work(struct work_struct *data) 14{ 15 struct ipc_uevent_info *info; 16 char *envp[2] = { NULL, NULL }; 17 18 info = container_of(data, struct ipc_uevent_info, work); 19 20 envp[0] = info->uevent; 21 22 if (kobject_uevent_env(&info->dev->kobj, KOBJ_CHANGE, envp)) 23 pr_err("uevent %s failed to sent", info->uevent); 24 25 kfree(info); 26} 27 28void ipc_uevent_send(struct device *dev, char *uevent) 29{ 30 struct ipc_uevent_info *info = kzalloc(sizeof(*info), GFP_ATOMIC); 31 32 if (!info) 33 return; 34 35 /* Initialize the kernel work queue */ 36 INIT_WORK(&info->work, ipc_uevent_work); 37 38 /* Store the device and event information */ 39 info->dev = dev; 40 snprintf(info->uevent, MAX_UEVENT_LEN, "IOSM_EVENT=%s", uevent); 41 42 /* Schedule uevent in process context using work queue */ 43 schedule_work(&info->work); 44}