diff options
Diffstat (limited to 'drivers/s390/cio/css.c')
| -rw-r--r-- | drivers/s390/cio/css.c | 37 |
1 files changed, 33 insertions, 4 deletions
diff --git a/drivers/s390/cio/css.c b/drivers/s390/cio/css.c index 65939e2..0bf7166 100644 --- a/drivers/s390/cio/css.c +++ b/drivers/s390/cio/css.c @@ -580,12 +580,24 @@ css_cm_enable_store(struct device *dev, struct device_attribute *attr, static DEVICE_ATTR(cm_enable, 0644, css_cm_enable_show, css_cm_enable_store); -static inline void __init -setup_css(int nr) +static inline int __init setup_css(int nr) { u32 tod_high; + int ret; memset(css[nr], 0, sizeof(struct channel_subsystem)); + css[nr]->pseudo_subchannel = + kzalloc(sizeof(*css[nr]->pseudo_subchannel), GFP_KERNEL); + if (!css[nr]->pseudo_subchannel) + return -ENOMEM; + css[nr]->pseudo_subchannel->dev.parent = &css[nr]->device; + css[nr]->pseudo_subchannel->dev.release = css_subchannel_release; + sprintf(css[nr]->pseudo_subchannel->dev.bus_id, "defunct"); + ret = cio_create_sch_lock(css[nr]->pseudo_subchannel); + if (ret) { + kfree(css[nr]->pseudo_subchannel); + return ret; + } mutex_init(&css[nr]->mutex); css[nr]->valid = 1; css[nr]->cssid = nr; @@ -593,6 +605,7 @@ setup_css(int nr) css[nr]->device.release = channel_subsystem_release; tod_high = (u32) (get_clock() >> 32); css_generate_pgid(css[nr], tod_high); + return 0; } /* @@ -629,10 +642,12 @@ init_channel_subsystem (void) ret = -ENOMEM; goto out_unregister; } - setup_css(i); - ret = device_register(&css[i]->device); + ret = setup_css(i); if (ret) goto out_free; + ret = device_register(&css[i]->device); + if (ret) + goto out_free_all; if (css_characteristics_avail && css_chsc_characteristics.secm) { ret = device_create_file(&css[i]->device, @@ -640,6 +655,9 @@ init_channel_subsystem (void) if (ret) goto out_device; } + ret = device_register(&css[i]->pseudo_subchannel->dev); + if (ret) + goto out_file; } css_init_done = 1; @@ -647,13 +665,19 @@ init_channel_subsystem (void) for_each_subchannel(__init_channel_subsystem, NULL); return 0; +out_file: + device_remove_file(&css[i]->device, &dev_attr_cm_enable); out_device: device_unregister(&css[i]->device); +out_free_all: + kfree(css[i]->pseudo_subchannel->lock); + kfree(css[i]->pseudo_subchannel); out_free: kfree(css[i]); out_unregister: while (i > 0) { i--; + device_unregister(&css[i]->pseudo_subchannel->dev); if (css_characteristics_avail && css_chsc_characteristics.secm) device_remove_file(&css[i]->device, &dev_attr_cm_enable); @@ -665,6 +689,11 @@ out: return ret; } +int sch_is_pseudo_sch(struct subchannel *sch) +{ + return sch == to_css(sch->dev.parent)->pseudo_subchannel; +} + /* * find a driver for a subchannel. They identify by the subchannel * type with the exception that the console subchannel driver has its own |
