diff options
Diffstat (limited to 'drivers/s390/char/raw3270.c')
| -rw-r--r-- | drivers/s390/char/raw3270.c | 35 |
1 files changed, 31 insertions, 4 deletions
diff --git a/drivers/s390/char/raw3270.c b/drivers/s390/char/raw3270.c index 2cdec21e8924..15b3459f8656 100644 --- a/drivers/s390/char/raw3270.c +++ b/drivers/s390/char/raw3270.c @@ -276,6 +276,15 @@ __raw3270_start(struct raw3270 *rp, struct raw3270_view *view, } int +raw3270_view_active(struct raw3270_view *view) +{ + struct raw3270 *rp = view->dev; + + return rp && rp->view == view && + !test_bit(RAW3270_FLAGS_FROZEN, &rp->flags); +} + +int raw3270_start(struct raw3270_view *view, struct raw3270_request *rq) { unsigned long flags; @@ -623,6 +632,8 @@ raw3270_reset_device_cb(struct raw3270_request *rq, void *data) raw3270_size_device_done(rp); } else raw3270_writesf_readpart(rp); + memset(&rp->init_reset, 0, sizeof(rp->init_reset)); + memset(&rp->init_data, 0, sizeof(rp->init_data)); } static int @@ -630,9 +641,10 @@ __raw3270_reset_device(struct raw3270 *rp) { int rc; + /* Check if reset is already pending */ + if (rp->init_reset.view) + return -EBUSY; /* Store reset data stream to init_data/init_reset */ - memset(&rp->init_reset, 0, sizeof(rp->init_reset)); - memset(&rp->init_data, 0, sizeof(rp->init_data)); rp->init_data[0] = TW_KR; rp->init_reset.ccw.cmd_code = TC_EWRITEA; rp->init_reset.ccw.flags = CCW_FLAG_SLI; @@ -776,22 +788,37 @@ raw3270_setup_device(struct ccw_device *cdev, struct raw3270 *rp, char *ascebc) } #ifdef CONFIG_TN3270_CONSOLE +/* Tentative definition - see below for actual definition. */ +static struct ccw_driver raw3270_ccw_driver; + /* * Setup 3270 device configured as console. */ -struct raw3270 __init *raw3270_setup_console(struct ccw_device *cdev) +struct raw3270 __init *raw3270_setup_console(void) { + struct ccw_device *cdev; unsigned long flags; struct raw3270 *rp; char *ascebc; int rc; + cdev = ccw_device_create_console(&raw3270_ccw_driver); + if (IS_ERR(cdev)) + return ERR_CAST(cdev); + rp = kzalloc(sizeof(struct raw3270), GFP_KERNEL | GFP_DMA); ascebc = kzalloc(256, GFP_KERNEL); rc = raw3270_setup_device(cdev, rp, ascebc); if (rc) return ERR_PTR(rc); set_bit(RAW3270_FLAGS_CONSOLE, &rp->flags); + + rc = ccw_device_enable_console(cdev); + if (rc) { + ccw_device_destroy_console(cdev); + return ERR_PTR(rc); + } + spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); do { __raw3270_reset_device(rp); @@ -826,7 +853,7 @@ raw3270_create_device(struct ccw_device *cdev) char *ascebc; int rc; - rp = kmalloc(sizeof(struct raw3270), GFP_KERNEL | GFP_DMA); + rp = kzalloc(sizeof(struct raw3270), GFP_KERNEL | GFP_DMA); if (!rp) return ERR_PTR(-ENOMEM); ascebc = kmalloc(256, GFP_KERNEL); |