static void sclp_conbuf_emit(void)
{
struct sclp_buffer* buffer;
unsigned long flags;
int rc;
spin_lock_irqsave(&sclp_con_lock, flags);
if (sclp_conbuf)
list_add_tail(&sclp_conbuf->list, &sclp_con_outqueue);
sclp_conbuf = NULL;
if (sclp_con_queue_running || sclp_con_suspended)
goto out_unlock;
if (list_empty(&sclp_con_outqueue))
goto out_unlock;
buffer = list_first_entry(&sclp_con_outqueue, struct sclp_buffer,
list);
sclp_con_queue_running = 1;
spin_unlock_irqrestore(&sclp_con_lock, flags);
rc = sclp_emit_buffer(buffer, sclp_conbuf_callback);
if (rc)
sclp_conbuf_callback(buffer, rc);
return;
out_unlock:
spin_unlock_irqrestore(&sclp_con_lock, flags);
}
static void
sclp_conbuf_callback(struct sclp_buffer *buffer, int rc)
{
unsigned long flags;
void *page;
do {
page = sclp_unmake_buffer(buffer);
spin_lock_irqsave(&sclp_con_lock, flags);
/* */
list_del(&buffer->list);
list_add_tail((struct list_head *) page, &sclp_con_pages);
/* */
buffer = NULL;
if (!list_empty(&sclp_con_outqueue))
buffer = list_first_entry(&sclp_con_outqueue,
struct sclp_buffer, list);
if (!buffer || sclp_con_suspended) {
sclp_con_queue_running = 0;
spin_unlock_irqrestore(&sclp_con_lock, flags);
break;
}
spin_unlock_irqrestore(&sclp_con_lock, flags);
} while (sclp_emit_buffer(buffer, sclp_conbuf_callback));
}
static void
sclp_conbuf_callback(struct sclp_buffer *buffer, int rc)
{
unsigned long flags;
void *page;
do {
page = sclp_unmake_buffer(buffer);
spin_lock_irqsave(&sclp_con_lock, flags);
/* Remove buffer from outqueue */
list_del(&buffer->list);
sclp_con_buffer_count--;
list_add_tail((struct list_head *) page, &sclp_con_pages);
/* Check if there is a pending buffer on the out queue. */
buffer = NULL;
if (!list_empty(&sclp_con_outqueue))
buffer = list_entry(sclp_con_outqueue.next,
struct sclp_buffer, list);
spin_unlock_irqrestore(&sclp_con_lock, flags);
} while (buffer && sclp_emit_buffer(buffer, sclp_conbuf_callback));
}
static void
sclp_conbuf_emit(void)
{
struct sclp_buffer* buffer;
unsigned long flags;
int count;
int rc;
spin_lock_irqsave(&sclp_con_lock, flags);
buffer = sclp_conbuf;
sclp_conbuf = NULL;
if (buffer == NULL) {
spin_unlock_irqrestore(&sclp_con_lock, flags);
return;
}
list_add_tail(&buffer->list, &sclp_con_outqueue);
count = sclp_con_buffer_count++;
spin_unlock_irqrestore(&sclp_con_lock, flags);
if (count)
return;
rc = sclp_emit_buffer(buffer, sclp_conbuf_callback);
if (rc)
sclp_conbuf_callback(buffer, rc);
}
