diff options
Diffstat (limited to 'drivers/char/ipmi/ipmi_msghandler.c')
| -rw-r--r-- | drivers/char/ipmi/ipmi_msghandler.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/char/ipmi/ipmi_msghandler.c b/drivers/char/ipmi/ipmi_msghandler.c index 6e191ff910e6..cdac5f7037e5 100644 --- a/drivers/char/ipmi/ipmi_msghandler.c +++ b/drivers/char/ipmi/ipmi_msghandler.c @@ -4511,6 +4511,23 @@ static int panic_event(struct notifier_block *this, /* Interface is not ready. */ continue; + /* + * If we were interrupted while locking xmit_msgs_lock or + * waiting_rcv_msgs_lock, the corresponding list may be + * corrupted. In this case, drop items on the list for + * the safety. + */ + if (!spin_trylock(&intf->xmit_msgs_lock)) { + INIT_LIST_HEAD(&intf->xmit_msgs); + INIT_LIST_HEAD(&intf->hp_xmit_msgs); + } else + spin_unlock(&intf->xmit_msgs_lock); + + if (!spin_trylock(&intf->waiting_rcv_msgs_lock)) + INIT_LIST_HEAD(&intf->waiting_rcv_msgs); + else + spin_unlock(&intf->waiting_rcv_msgs_lock); + intf->run_to_completion = 1; intf->handlers->set_run_to_completion(intf->send_info, 1); } |