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| author | Sebastian Ott <sebott@linux.vnet.ibm.com> | 2013-04-13 12:58:55 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2013-04-17 14:07:31 +0200 |
| commit | c135ad1caffe2b35d6316758a605a2b63ca22bb3 (patch) | |
| tree | f1b34819c6d3c1102cea9cc4d202013ef01d3fa9 /drivers/s390/cio/css.c | |
| parent | f10ccca7a555f5e80ed7ecff58e7dfdab03860da (diff) | |
| download | linux-c135ad1caffe2b35d6316758a605a2b63ca22bb3.tar.bz2 | |
s390/cio: split subchannel registration
Split the subchannel registration in device_initialize and device_add
and move the initialization part inside the allocation function. With
this change we can use refcounting during the complete lifespan of a
subchannel which is important for devices where we do the actually
registration at a later time.
Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com>
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/cio/css.c')
| -rw-r--r-- | drivers/s390/cio/css.c | 37 |
1 files changed, 18 insertions, 19 deletions
diff --git a/drivers/s390/cio/css.c b/drivers/s390/cio/css.c index 658d9349c837..8a1294b1cbaf 100644 --- a/drivers/s390/cio/css.c +++ b/drivers/s390/cio/css.c @@ -137,8 +137,21 @@ out: static void css_sch_todo(struct work_struct *work); -static struct subchannel * -css_alloc_subchannel(struct subchannel_id schid) +static void css_subchannel_release(struct device *dev) +{ + struct subchannel *sch; + + sch = to_subchannel(dev); + if (!cio_is_console(sch->schid)) { + /* Reset intparm to zeroes. */ + sch->config.intparm = 0; + cio_commit_config(sch); + kfree(sch->lock); + kfree(sch); + } +} + +static struct subchannel *css_alloc_subchannel(struct subchannel_id schid) { struct subchannel *sch; int ret; @@ -152,24 +165,11 @@ css_alloc_subchannel(struct subchannel_id schid) return ERR_PTR(ret); } INIT_WORK(&sch->todo_work, css_sch_todo); + sch->dev.release = &css_subchannel_release; + device_initialize(&sch->dev); return sch; } -static void -css_subchannel_release(struct device *dev) -{ - struct subchannel *sch; - - sch = to_subchannel(dev); - if (!cio_is_console(sch->schid)) { - /* Reset intparm to zeroes. */ - sch->config.intparm = 0; - cio_commit_config(sch); - kfree(sch->lock); - kfree(sch); - } -} - static int css_sch_device_register(struct subchannel *sch) { int ret; @@ -177,7 +177,7 @@ static int css_sch_device_register(struct subchannel *sch) mutex_lock(&sch->reg_mutex); dev_set_name(&sch->dev, "0.%x.%04x", sch->schid.ssid, sch->schid.sch_no); - ret = device_register(&sch->dev); + ret = device_add(&sch->dev); mutex_unlock(&sch->reg_mutex); return ret; } @@ -282,7 +282,6 @@ static int css_register_subchannel(struct subchannel *sch) /* Initialize the subchannel structure */ sch->dev.parent = &channel_subsystems[0]->device; sch->dev.bus = &css_bus_type; - sch->dev.release = &css_subchannel_release; sch->dev.groups = default_subch_attr_groups; /* * We don't want to generate uevents for I/O subchannels that don't |