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IOC mediator: fix IOC mediator blocks acrn-dm shutdown flow

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This patch resolves IOC mediator deinit function is blocked due to IOC mediator
core thread enters into sleep by epoll_wait, then pthread_join cannot return.

Trigger an event to wakeup core thread when IOC mediator deinit is invoked.

Signed-off-by: Yuan Liu <yuan1.liu@intel.com>
Reviewed-by: Liang Yang <liang3.yang@intel.com>
Acked-by: Yu Wang <yu1.wang@intel.com>
This commit is contained in:
Yuan Liu 2018-07-12 14:23:50 +08:00 committed by lijinxia
parent 159d57b703
commit b7436272e7
2 changed files with 8 additions and 2 deletions
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7
devicemodel/hw/platform/ioc.c
View File

@ -973,6 +973,10 @@ ioc_process_events(struct ioc_dev *ioc, enum ioc_ch_id id)
return;
}
/* IOC_E_KNOCK event is only used to wakeup core thread */
if (evt == IOC_E_KNOCK)
return;
for (i = 0; i < ARRAY_SIZE(ioc_state_tbl); i++) {
if (evt == ioc_state_tbl[i].evt &&
ioc->state == ioc_state_tbl[i].cur_stat) {
@ -1154,7 +1158,7 @@ ioc_core_thread(void *arg)
}
/* Start to epoll wait loop */
for (;;) {
while (!ioc->closing) {
n = epoll_wait(ioc->epfd, eventlist, IOC_MAX_EVENTS, -1);
if (n < 0 && errno != EINTR) {
DPRINTF("ioc epoll wait error:%s, exit ioc core\r\n",
@ -1284,6 +1288,7 @@ ioc_kill_workers(struct ioc_dev *ioc)
ioc->closing = 1;
/* Stop IOC core thread */
ioc_update_event(ioc->evt_fd, IOC_E_KNOCK);
close(ioc->epfd);
ioc->epfd = IOC_INIT_FD;
pthread_join(ioc->tid, NULL);

3
devicemodel/include/ioc.h
View File

@ -659,7 +659,8 @@ enum ioc_event_type {
IOC_E_RAM_REFRESH,
IOC_E_HB_INACTIVE,
IOC_E_SHUTDOWN,
IOC_E_RESUME
IOC_E_RESUME,
IOC_E_KNOCK,
};
/*