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[S390] css: move chsc_private to drv_data 

Use the subchannels drv_data to access chsc_private
for chsc subchannels.

Note: Also set the drv_data prior to the cio_enable_subchannel
call, since we can receive an interrupt the moment we enable
the subchannel and the IRQ handler relies on this data.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Sebastian Ott 2011-03-15 17:08:28 +01:00 committed by Martin Schwidefsky
parent f92519e83e
commit 85fb534e27
1 changed files with 6 additions and 5 deletions
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11
drivers/s390/cio/chsc_sch.c
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@ -50,7 +50,7 @@ MODULE_LICENSE("GPL");
static void chsc_subchannel_irq(struct subchannel *sch)
{
struct chsc_private *private = sch->private;
struct chsc_private *private = dev_get_drvdata(&sch->dev);
struct chsc_request *request = private->request;
struct irb *irb = (struct irb *)&S390_lowcore.irb;
@ -80,13 +80,14 @@ static int chsc_subchannel_probe(struct subchannel *sch)
private = kzalloc(sizeof(*private), GFP_KERNEL);
if (!private)
return -ENOMEM;
dev_set_drvdata(&sch->dev, private);
ret = cio_enable_subchannel(sch, (u32)(unsigned long)sch);
if (ret) {
CHSC_MSG(0, "Failed to enable 0.%x.%04x: %d\n",
sch->schid.ssid, sch->schid.sch_no, ret);
dev_set_drvdata(&sch->dev, NULL);
kfree(private);
} else {
sch->private = private;
if (dev_get_uevent_suppress(&sch->dev)) {
dev_set_uevent_suppress(&sch->dev, 0);
kobject_uevent(&sch->dev.kobj, KOBJ_ADD);
@ -100,8 +101,8 @@ static int chsc_subchannel_remove(struct subchannel *sch)
struct chsc_private *private;
cio_disable_subchannel(sch);
private = sch->private;
sch->private = NULL;
private = dev_get_drvdata(&sch->dev);
dev_set_drvdata(&sch->dev, NULL);
if (private->request) {
complete(&private->request->completion);
put_device(&sch->dev);
@ -241,7 +242,7 @@ static int chsc_async(struct chsc_async_area *chsc_area,
chsc_area->header.key = PAGE_DEFAULT_KEY >> 4;
while ((sch = chsc_get_next_subchannel(sch))) {
spin_lock(sch->lock);
private = sch->private;
private = dev_get_drvdata(&sch->dev);
if (private->request) {
spin_unlock(sch->lock);
ret = -EBUSY;