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 */
ipc_uevent_work(struct work_struct * data)13 static 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 
ipc_uevent_send(struct device * dev,char * uevent)28 void 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 }
45