diff options
Diffstat (limited to 'drivers/s390/cio/qdio_thinint.c')
| -rw-r--r-- | drivers/s390/cio/qdio_thinint.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/drivers/s390/cio/qdio_thinint.c b/drivers/s390/cio/qdio_thinint.c index 8e90e147b746..981044c83864 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; @@ -95,10 +96,10 @@ 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 +119,10 @@ 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(); } } |