diff options
Diffstat (limited to 'drivers/s390/char')
| -rw-r--r-- | drivers/s390/char/raw3270.c | 9 | ||||
| -rw-r--r-- | drivers/s390/char/sclp_config.c | 2 | ||||
| -rw-r--r-- | drivers/s390/char/sclp_vt220.c | 28 | ||||
| -rw-r--r-- | drivers/s390/char/tape.h | 3 | ||||
| -rw-r--r-- | drivers/s390/char/tape_3590.c | 2 | ||||
| -rw-r--r-- | drivers/s390/char/tape_block.c | 4 | ||||
| -rw-r--r-- | drivers/s390/char/tape_core.c | 16 |
7 files changed, 26 insertions, 38 deletions
diff --git a/drivers/s390/char/raw3270.c b/drivers/s390/char/raw3270.c index 0d98f1f..848ef7e 100644 --- a/drivers/s390/char/raw3270.c +++ b/drivers/s390/char/raw3270.c @@ -549,7 +549,6 @@ raw3270_start_init(struct raw3270 *rp, struct raw3270_view *view, struct raw3270_request *rq) { unsigned long flags; - wait_queue_head_t wq; int rc; #ifdef CONFIG_TN3270_CONSOLE @@ -566,20 +565,20 @@ raw3270_start_init(struct raw3270 *rp, struct raw3270_view *view, return rq->rc; } #endif - init_waitqueue_head(&wq); rq->callback = raw3270_wake_init; - rq->callback_data = &wq; + rq->callback_data = &raw3270_wait_queue; spin_lock_irqsave(get_ccwdev_lock(view->dev->cdev), flags); rc = __raw3270_start(rp, view, rq); spin_unlock_irqrestore(get_ccwdev_lock(view->dev->cdev), flags); if (rc) return rc; /* Now wait for the completion. */ - rc = wait_event_interruptible(wq, raw3270_request_final(rq)); + rc = wait_event_interruptible(raw3270_wait_queue, + raw3270_request_final(rq)); if (rc == -ERESTARTSYS) { /* Interrupted by a signal. */ raw3270_halt_io(view->dev, rq); /* No wait for the halt to complete. */ - wait_event(wq, raw3270_request_final(rq)); + wait_event(raw3270_wait_queue, raw3270_request_final(rq)); return -ERESTARTSYS; } return rq->rc; diff --git a/drivers/s390/char/sclp_config.c b/drivers/s390/char/sclp_config.c index 9e784d5..ad05a87 100644 --- a/drivers/s390/char/sclp_config.c +++ b/drivers/s390/char/sclp_config.c @@ -40,7 +40,7 @@ static void sclp_cpu_capability_notify(struct work_struct *work) put_online_cpus(); } -static void sclp_cpu_change_notify(struct work_struct *work) +static void __ref sclp_cpu_change_notify(struct work_struct *work) { smp_rescan_cpus(); } diff --git a/drivers/s390/char/sclp_vt220.c b/drivers/s390/char/sclp_vt220.c index 35707c0..3e577f6 100644 --- a/drivers/s390/char/sclp_vt220.c +++ b/drivers/s390/char/sclp_vt220.c @@ -71,9 +71,6 @@ static struct list_head sclp_vt220_outqueue; /* Number of requests in outqueue */ static int sclp_vt220_outqueue_count; -/* Wait queue used to delay write requests while we've run out of buffers */ -static wait_queue_head_t sclp_vt220_waitq; - /* Timer used for delaying write requests to merge subsequent messages into * a single buffer */ static struct timer_list sclp_vt220_timer; @@ -133,7 +130,6 @@ sclp_vt220_process_queue(struct sclp_vt220_request *request) } while (request && __sclp_vt220_emit(request)); if (request == NULL && sclp_vt220_flush_later) sclp_vt220_emit_current(); - wake_up(&sclp_vt220_waitq); /* Check if the tty needs a wake up call */ if (sclp_vt220_tty != NULL) { tty_wakeup(sclp_vt220_tty); @@ -383,7 +379,7 @@ sclp_vt220_timeout(unsigned long data) */ static int __sclp_vt220_write(const unsigned char *buf, int count, int do_schedule, - int convertlf, int may_schedule) + int convertlf, int may_fail) { unsigned long flags; void *page; @@ -395,15 +391,14 @@ __sclp_vt220_write(const unsigned char *buf, int count, int do_schedule, overall_written = 0; spin_lock_irqsave(&sclp_vt220_lock, flags); do { - /* Create a sclp output buffer if none exists yet */ + /* Create an sclp output buffer if none exists yet */ if (sclp_vt220_current_request == NULL) { while (list_empty(&sclp_vt220_empty)) { spin_unlock_irqrestore(&sclp_vt220_lock, flags); - if (in_interrupt() || !may_schedule) - sclp_sync_wait(); + if (may_fail) + goto out; else - wait_event(sclp_vt220_waitq, - !list_empty(&sclp_vt220_empty)); + sclp_sync_wait(); spin_lock_irqsave(&sclp_vt220_lock, flags); } page = (void *) sclp_vt220_empty.next; @@ -437,6 +432,7 @@ __sclp_vt220_write(const unsigned char *buf, int count, int do_schedule, add_timer(&sclp_vt220_timer); } spin_unlock_irqrestore(&sclp_vt220_lock, flags); +out: return overall_written; } @@ -520,19 +516,11 @@ sclp_vt220_close(struct tty_struct *tty, struct file *filp) * character to the tty device. If the kernel uses this routine, * it must call the flush_chars() routine (if defined) when it is * done stuffing characters into the driver. - * - * NOTE: include/linux/tty_driver.h specifies that a character should be - * ignored if there is no room in the queue. This driver implements a different - * semantic in that it will block when there is no more room left. - * - * FIXME: putchar can currently be called from BH and other non blocking - * handlers so this semantic isn't a good idea. */ static int sclp_vt220_put_char(struct tty_struct *tty, unsigned char ch) { - __sclp_vt220_write(&ch, 1, 0, 0, 1); - return 1; + return __sclp_vt220_write(&ch, 1, 0, 0, 1); } /* @@ -653,7 +641,6 @@ static int __init __sclp_vt220_init(void) spin_lock_init(&sclp_vt220_lock); INIT_LIST_HEAD(&sclp_vt220_empty); INIT_LIST_HEAD(&sclp_vt220_outqueue); - init_waitqueue_head(&sclp_vt220_waitq); init_timer(&sclp_vt220_timer); sclp_vt220_current_request = NULL; sclp_vt220_buffered_chars = 0; @@ -786,6 +773,7 @@ sclp_vt220_con_init(void) { int rc; + INIT_LIST_HEAD(&sclp_vt220_register.list); if (!CONSOLE_IS_SCLP) return 0; rc = __sclp_vt220_init(); diff --git a/drivers/s390/char/tape.h b/drivers/s390/char/tape.h index dddf8d6..d0d565a 100644 --- a/drivers/s390/char/tape.h +++ b/drivers/s390/char/tape.h @@ -231,6 +231,9 @@ struct tape_device { /* Request queue. */ struct list_head req_queue; + /* Request wait queue. */ + wait_queue_head_t wait_queue; + /* Each tape device has (currently) two minor numbers. */ int first_minor; diff --git a/drivers/s390/char/tape_3590.c b/drivers/s390/char/tape_3590.c index 8246ef3..42ce791 100644 --- a/drivers/s390/char/tape_3590.c +++ b/drivers/s390/char/tape_3590.c @@ -1598,7 +1598,7 @@ tape_3590_setup_device(struct tape_device *device) rc = tape_3590_read_dev_chars(device, rdc_data); if (rc) { DBF_LH(3, "Read device characteristics failed!\n"); - goto fail_kmalloc; + goto fail_rdc_data; } rc = tape_std_assign(device); if (rc) diff --git a/drivers/s390/char/tape_block.c b/drivers/s390/char/tape_block.c index ddc4a11..95da72b 100644 --- a/drivers/s390/char/tape_block.c +++ b/drivers/s390/char/tape_block.c @@ -179,11 +179,11 @@ tapeblock_requeue(struct work_struct *work) { tapeblock_end_request(req, -EIO); continue; } + blkdev_dequeue_request(req); + nr_queued++; spin_unlock_irq(&device->blk_data.request_queue_lock); rc = tapeblock_start_request(device, req); spin_lock_irq(&device->blk_data.request_queue_lock); - blkdev_dequeue_request(req); - nr_queued++; } spin_unlock_irq(&device->blk_data.request_queue_lock); atomic_set(&device->blk_data.requeue_scheduled, 0); diff --git a/drivers/s390/char/tape_core.c b/drivers/s390/char/tape_core.c index 76e44eb..c20e3c5 100644 --- a/drivers/s390/char/tape_core.c +++ b/drivers/s390/char/tape_core.c @@ -449,6 +449,7 @@ tape_alloc_device(void) INIT_LIST_HEAD(&device->req_queue); INIT_LIST_HEAD(&device->node); init_waitqueue_head(&device->state_change_wq); + init_waitqueue_head(&device->wait_queue); device->tape_state = TS_INIT; device->medium_state = MS_UNKNOWN; *device->modeset_byte = 0; @@ -954,21 +955,19 @@ __tape_wake_up(struct tape_request *request, void *data) int tape_do_io(struct tape_device *device, struct tape_request *request) { - wait_queue_head_t wq; int rc; - init_waitqueue_head(&wq); spin_lock_irq(get_ccwdev_lock(device->cdev)); /* Setup callback */ request->callback = __tape_wake_up; - request->callback_data = &wq; + request->callback_data = &device->wait_queue; /* Add request to request queue and try to start it. */ rc = __tape_start_request(device, request); spin_unlock_irq(get_ccwdev_lock(device->cdev)); if (rc) return rc; /* Request added to the queue. Wait for its completion. */ - wait_event(wq, (request->callback == NULL)); + wait_event(device->wait_queue, (request->callback == NULL)); /* Get rc from request */ return request->rc; } @@ -989,20 +988,19 @@ int tape_do_io_interruptible(struct tape_device *device, struct tape_request *request) { - wait_queue_head_t wq; int rc; - init_waitqueue_head(&wq); spin_lock_irq(get_ccwdev_lock(device->cdev)); /* Setup callback */ request->callback = __tape_wake_up_interruptible; - request->callback_data = &wq; + request->callback_data = &device->wait_queue; rc = __tape_start_request(device, request); spin_unlock_irq(get_ccwdev_lock(device->cdev)); if (rc) return rc; /* Request added to the queue. Wait for its completion. */ - rc = wait_event_interruptible(wq, (request->callback == NULL)); + rc = wait_event_interruptible(device->wait_queue, + (request->callback == NULL)); if (rc != -ERESTARTSYS) /* Request finished normally. */ return request->rc; @@ -1015,7 +1013,7 @@ tape_do_io_interruptible(struct tape_device *device, /* Wait for the interrupt that acknowledges the halt. */ do { rc = wait_event_interruptible( - wq, + device->wait_queue, (request->callback == NULL) ); } while (rc == -ERESTARTSYS); |