/*
* Special call, doesn't claim any locks. This is only to be called
* at panic or halt time, in run-to-completion mode, when the caller
* is the only CPU and the only thing that will be going is these IPMI
* calls.
*/
static void panic_halt_ipmi_set_timeout(void)
{
int send_heartbeat_now;
int rv;
/* Wait for the messages to be free. */
while (atomic_read(&panic_done_count) != 0)
ipmi_poll_interface(watchdog_user);
rv = i_ipmi_set_timeout(&panic_halt_smi_msg,
&panic_halt_recv_msg,
&send_heartbeat_now);
if (!rv) {
atomic_add(2, &panic_done_count);
if (send_heartbeat_now)
panic_halt_ipmi_heartbeat();
} else
printk(KERN_WARNING PFX
"Unable to extend the watchdog timeout.");
while (atomic_read(&panic_done_count) != 0)
ipmi_poll_interface(watchdog_user);
}
/* Wait for message to complete, spinning. */
static int ipmi_request_in_rc_mode(ipmi_user_t user,
struct ipmi_addr *addr,
struct kernel_ipmi_msg *send_msg)
{
int rv;
atomic_set(&dummy_count, 2);
rv = ipmi_request_supply_msgs(user, addr, 0, send_msg, NULL,
&halt_smi_msg, &halt_recv_msg, 0);
if (rv) {
atomic_set(&dummy_count, 0);
return rv;
}
/*
* Spin until our message is done.
*/
while (atomic_read(&dummy_count) > 0) {
ipmi_poll_interface(user);
cpu_relax();
}
return halt_recv_msg.msg.data[0];
}
