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 */ 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 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