diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/s390/cio/qdio_main.c | 35 | ||||
| -rw-r--r-- | drivers/s390/cio/qdio_thinint.c | 8 |
2 files changed, 28 insertions, 15 deletions
diff --git a/drivers/s390/cio/qdio_main.c b/drivers/s390/cio/qdio_main.c index fa902703996..1974ec7bf0e 100644 --- a/drivers/s390/cio/qdio_main.c +++ b/drivers/s390/cio/qdio_main.c @@ -778,21 +778,17 @@ static void __qdio_outbound_processing(struct qdio_q *q) spin_unlock_irqrestore(&q->lock, flags); - if (queue_type(q) == QDIO_ZFCP_QFMT) { + if (queue_type(q) == QDIO_ZFCP_QFMT) if (!pci_out_supported(q) && !qdio_outbound_q_done(q)) - tasklet_schedule(&q->tasklet); - return; - } + goto sched; /* bail out for HiperSockets unicast queues */ if (queue_type(q) == QDIO_IQDIO_QFMT && !multicast_outbound(q)) return; if ((queue_type(q) == QDIO_IQDIO_QFMT) && - (atomic_read(&q->nr_buf_used)) > QDIO_IQDIO_POLL_LVL) { - tasklet_schedule(&q->tasklet); - return; - } + (atomic_read(&q->nr_buf_used)) > QDIO_IQDIO_POLL_LVL) + goto sched; if (q->u.out.pci_out_enabled) return; @@ -810,6 +806,12 @@ static void __qdio_outbound_processing(struct qdio_q *q) qdio_perf_stat_inc(&perf_stats.debug_tl_out_timer); } } + return; + +sched: + if (unlikely(q->irq_ptr->state == QDIO_IRQ_STATE_STOPPED)) + return; + tasklet_schedule(&q->tasklet); } /* outbound tasklet */ @@ -822,6 +824,9 @@ void qdio_outbound_processing(unsigned long data) void qdio_outbound_timer(unsigned long data) { struct qdio_q *q = (struct qdio_q *)data; + + if (unlikely(q->irq_ptr->state == QDIO_IRQ_STATE_STOPPED)) + return; tasklet_schedule(&q->tasklet); } @@ -863,6 +868,9 @@ static void qdio_int_handler_pci(struct qdio_irq *irq_ptr) int i; struct qdio_q *q; + if (unlikely(irq_ptr->state == QDIO_IRQ_STATE_STOPPED)) + return; + qdio_perf_stat_inc(&perf_stats.pci_int); for_each_input_queue(irq_ptr, q, i) @@ -1090,11 +1098,11 @@ static void qdio_shutdown_queues(struct ccw_device *cdev) int i; for_each_input_queue(irq_ptr, q, i) - tasklet_disable(&q->tasklet); + tasklet_kill(&q->tasklet); for_each_output_queue(irq_ptr, q, i) { - tasklet_disable(&q->tasklet); del_timer(&q->u.out.timer); + tasklet_kill(&q->tasklet); } } @@ -1125,6 +1133,12 @@ int qdio_shutdown(struct ccw_device *cdev, int how) return 0; } + /* + * Indicate that the device is going down. Scheduling the queue + * tasklets is forbidden from here on. + */ + qdio_set_state(irq_ptr, QDIO_IRQ_STATE_STOPPED); + tiqdio_remove_input_queues(irq_ptr); qdio_shutdown_queues(cdev); qdio_shutdown_debug_entries(irq_ptr, cdev); @@ -1556,7 +1570,6 @@ static void handle_outbound(struct qdio_q *q, unsigned int callflags, qdio_perf_stat_inc(&perf_stats.fast_requeue); } out: - /* Fixme: could wait forever if called from process context */ tasklet_schedule(&q->tasklet); } diff --git a/drivers/s390/cio/qdio_thinint.c b/drivers/s390/cio/qdio_thinint.c index 981044c8386..c7c5512a892 100644 --- a/drivers/s390/cio/qdio_thinint.c +++ b/drivers/s390/cio/qdio_thinint.c @@ -101,7 +101,6 @@ void tiqdio_add_input_queues(struct qdio_irq *irq_ptr) list_add_rcu(&q->entry, &tiq_list); mutex_unlock(&tiq_list_lock); xchg(irq_ptr->dsci, 1); - tasklet_schedule(&tiqdio_tasklet); } /* @@ -159,7 +158,6 @@ static void __tiqdio_inbound_processing(struct qdio_q *q) */ qdio_check_outbound_after_thinint(q); -again: if (!qdio_inbound_q_moved(q)) return; @@ -167,7 +165,8 @@ again: 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); @@ -177,7 +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); } } |