/**
* chp_cfg_cancel_deconfigure - cancel chpid deconfiguration request
* @chpid - channel-path ID
*
* Cancel an active channel-path deconfiguration request if it has not yet
* been performed.
*/
void chp_cfg_cancel_deconfigure(struct chp_id chpid)
{
CIO_MSG_EVENT(2, "chp_cfg_cancel:%x.%02x\n", chpid.cssid, chpid.id);
mutex_lock(&cfg_lock);
if (cfg_get_task(chpid) == cfg_deconfigure)
cfg_set_task(chpid, cfg_none);
mutex_unlock(&cfg_lock);
}
/**
* chp_cfg_schedule - schedule chpid configuration request
* @chpid - channel-path ID
* @configure - Non-zero for configure, zero for deconfigure
*
* Schedule a channel-path configuration/deconfiguration request.
*/
void chp_cfg_schedule(struct chp_id chpid, int configure)
{
CIO_MSG_EVENT(2, "chp_cfg_sched%x.%02x=%d\n", chpid.cssid, chpid.id,
configure);
mutex_lock(&cfg_lock);
cfg_set_task(chpid, configure ? cfg_configure : cfg_deconfigure);
cfg_busy = 1;
mutex_unlock(&cfg_lock);
queue_work(chp_wq, &cfg_work);
}
/* Perform one configure/deconfigure request. Reschedule work function until
* last request. */
static void cfg_func(struct work_struct *work)
{
struct chp_id chpid;
enum cfg_task_t t;
int rc;
mutex_lock(&cfg_lock);
t = cfg_none;
chp_id_for_each(&chpid) {
t = cfg_get_task(chpid);
if (t != cfg_none) {
cfg_set_task(chpid, cfg_none);
break;
}
}
mutex_unlock(&cfg_lock);
switch (t) {
case cfg_configure:
rc = sclp_chp_configure(chpid);
if (rc)
CIO_MSG_EVENT(2, "chp: sclp_chp_configure(%x.%02x)="
"%d\n", chpid.cssid, chpid.id, rc);
else {
info_expire();
chsc_chp_online(chpid);
}
break;
case cfg_deconfigure:
rc = sclp_chp_deconfigure(chpid);
if (rc)
CIO_MSG_EVENT(2, "chp: sclp_chp_deconfigure(%x.%02x)="
"%d\n", chpid.cssid, chpid.id, rc);
else {
info_expire();
chsc_chp_offline(chpid);
}
break;
case cfg_none:
/* Get updated information after last change. */
info_update();
mutex_lock(&cfg_lock);
cfg_busy = 0;
mutex_unlock(&cfg_lock);
wake_up_interruptible(&cfg_wait_queue);
return;
}
queue_work(chp_wq, &cfg_work);
}
/* Perform one configure/deconfigure request. Reschedule work function until
* last request. */
static void cfg_func(void *data)
{
struct chp_id chpid;
enum cfg_task_t t;
mutex_lock(&cfg_lock);
t = cfg_none;
chp_id_for_each(&chpid) {
t = cfg_get_task(chpid);
if (t != cfg_none) {
cfg_set_task(chpid, cfg_none);
break;
}
}
mutex_unlock(&cfg_lock);
switch (t) {
case cfg_configure:
sclp_chp_configure(chpid);
info_expire();
chsc_chp_online(chpid);
break;
case cfg_deconfigure:
sclp_chp_deconfigure(chpid);
info_expire();
chsc_chp_offline(chpid);
break;
case cfg_none:
/* Get updated information after last change. */
info_update();
mutex_lock(&cfg_lock);
cfg_busy = 0;
mutex_unlock(&cfg_lock);
wake_up_interruptible(&cfg_wait_queue);
return;
}
queue_work(chp_wq, &cfg_work);
}