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path: root/drivers/s390/cio/qdio_thinint.c
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Diffstat (limited to 'drivers/s390/cio/qdio_thinint.c')
-rw-r--r--drivers/s390/cio/qdio_thinint.c23
1 files changed, 14 insertions, 9 deletions
diff --git a/drivers/s390/cio/qdio_thinint.c b/drivers/s390/cio/qdio_thinint.c
index 8e90e147b74..c655d011a78 100644
--- a/drivers/s390/cio/qdio_thinint.c
+++ b/drivers/s390/cio/qdio_thinint.c
@@ -31,6 +31,7 @@
/* list of thin interrupt input queues */
static LIST_HEAD(tiq_list);
+DEFINE_MUTEX(tiq_list_lock);
/* adapter local summary indicator */
static unsigned char *tiqdio_alsi;
@@ -95,12 +96,11 @@ void tiqdio_add_input_queues(struct qdio_irq *irq_ptr)
if (!css_qdio_omit_svs && irq_ptr->siga_flag.sync)
css_qdio_omit_svs = 1;
- for_each_input_queue(irq_ptr, q, i) {
+ mutex_lock(&tiq_list_lock);
+ for_each_input_queue(irq_ptr, q, i)
list_add_rcu(&q->entry, &tiq_list);
- synchronize_rcu();
- }
+ mutex_unlock(&tiq_list_lock);
xchg(irq_ptr->dsci, 1);
- tasklet_schedule(&tiqdio_tasklet);
}
/*
@@ -118,7 +118,10 @@ void tiqdio_remove_input_queues(struct qdio_irq *irq_ptr)
/* if establish triggered an error */
if (!q || !q->entry.prev || !q->entry.next)
continue;
+
+ mutex_lock(&tiq_list_lock);
list_del_rcu(&q->entry);
+ mutex_unlock(&tiq_list_lock);
synchronize_rcu();
}
}
@@ -155,15 +158,15 @@ static void __tiqdio_inbound_processing(struct qdio_q *q)
*/
qdio_check_outbound_after_thinint(q);
-again:
if (!qdio_inbound_q_moved(q))
return;
- qdio_kick_inbound_handler(q);
+ qdio_kick_handler(q);
if (!tiqdio_inbound_q_done(q)) {
qdio_perf_stat_inc(&perf_stats.thinint_inbound_loop);
- goto again;
+ if (likely(q->irq_ptr->state != QDIO_IRQ_STATE_STOPPED))
+ tasklet_schedule(&q->tasklet);
}
qdio_stop_polling(q);
@@ -173,7 +176,8 @@ again:
*/
if (!tiqdio_inbound_q_done(q)) {
qdio_perf_stat_inc(&perf_stats.thinint_inbound_loop2);
- goto again;
+ if (likely(q->irq_ptr->state != QDIO_IRQ_STATE_STOPPED))
+ tasklet_schedule(&q->tasklet);
}
}
@@ -366,10 +370,11 @@ void qdio_shutdown_thinint(struct qdio_irq *irq_ptr)
void __exit tiqdio_unregister_thinints(void)
{
- tasklet_disable(&tiqdio_tasklet);
+ WARN_ON(!list_empty(&tiq_list));
if (tiqdio_alsi) {
s390_unregister_adapter_interrupt(tiqdio_alsi, QDIO_AIRQ_ISC);
isc_unregister(QDIO_AIRQ_ISC);
}
+ tasklet_kill(&tiqdio_tasklet);
}