void send_to_arm9(void* pReq, void* pRsp, unsigned int rsp_len)
{
// sleep some time to avoid normal and work queue overlap
msleep(100);
// initialize this work queue only once
if(send_to_arm9_wq == NULL)
{
printk(KERN_INFO "%s initialize work queue\n", __func__);
send_to_arm9_wq = create_singlethread_workqueue("send_to_arm9_wq");
INIT_WORK(&send_to_arm9_data.work, send_to_arm9_wq_func);
SET_MUTEX_FLAG(0); // initial flag is 0
SET_COMPLETE_MAIN(1); // initial complete flag is 1
SET_COMPLETE_SUB(1); // initial complete flag is 1
}
if(GET_MUTEX_FLAG() == 0)
{
#ifdef LOCAL_RAPI_DBG
printk(KERN_INFO "%s, flag : %d, do normal work\n", __func__, GET_MUTEX_FLAG());
#endif
INCREASE_MUTEX_FLAG();
SET_COMPLETE_MAIN(0);
wait_for_sub_try_finished();
do_send_to_arm9(pReq, pRsp, NORMAL_WORK_FLAG, rsp_len);
SET_COMPLETE_MAIN(1);
DECREASE_MUTEX_FLAG();
}
else
{
// hardly ever comes here in normal case.
// Previously, it took more than 30 secs for modem factory reset, and this wq was needed at that time
printk(KERN_INFO "%s, flag : %d, activate work queue\n", __func__, GET_MUTEX_FLAG());
INCREASE_MUTEX_FLAG(); // increase before getting into the work queue
SET_COMPLETE_SUB(0);
send_to_arm9_data.pReq = pReq;
send_to_arm9_data.pRsp = pRsp;
send_to_arm9_data.rsp_len = rsp_len;
queue_work(send_to_arm9_wq, &send_to_arm9_data.work);
wait_for_sub_try_finished();
}
return;
}
static void
send_to_arm9_wq_func(struct work_struct *work)
{
printk(KERN_INFO "%s, flag : %d, handle work queue\n", __func__, GET_MUTEX_FLAG() );
wait_for_main_try_finished();
do_send_to_arm9(send_to_arm9_data.pReq, send_to_arm9_data.pRsp, WORK_QUEUE_FLAG);
DECREASE_MUTEX_FLAG();
SET_COMPLETE_SUB(1);
return;
}
void send_to_arm9(void* pReq, void* pRsp)
{
msleep(100);
if(send_to_arm9_wq == NULL)
{
printk(KERN_INFO "%s initialize work queue\n", __func__);
send_to_arm9_wq = create_singlethread_workqueue("send_to_arm9_wq");
INIT_WORK(&send_to_arm9_data.work, send_to_arm9_wq_func);
SET_MUTEX_FLAG(0);
SET_COMPLETE_MAIN(1);
SET_COMPLETE_SUB(1);
}
if(GET_MUTEX_FLAG() == 0)
{
#ifdef LOCAL_RAPI_DBG
printk(KERN_INFO "%s, flag : %d, do normal work\n", __func__, GET_MUTEX_FLAG());
#endif
INCREASE_MUTEX_FLAG();
SET_COMPLETE_MAIN(0);
wait_for_sub_try_finished();
do_send_to_arm9(pReq, pRsp, NORMAL_WORK_FLAG);
SET_COMPLETE_MAIN(1);
DECREASE_MUTEX_FLAG();
}
else
{
printk(KERN_INFO "%s, flag : %d, activate work queue\n", __func__, GET_MUTEX_FLAG());
INCREASE_MUTEX_FLAG();
SET_COMPLETE_SUB(0);
send_to_arm9_data.pReq = pReq;
send_to_arm9_data.pRsp = pRsp;
queue_work(send_to_arm9_wq, &send_to_arm9_data.work);
wait_for_sub_try_finished();
}
return;
}