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[S390] cio: Reset sch->driver.

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sch->driver needs to be reset to NULL on failed probe and after
remove. We also need to check for sch->driver on shutdown.

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Cornelia Huck 2008-01-26 14:10:40 +01:00 committed by Martin Schwidefsky
parent 602b20f2bf
commit 98c13c283a
1 changed files with 19 additions and 15 deletions
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34
drivers/s390/cio/css.c
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@ -796,32 +796,36 @@ css_bus_match (struct device *dev, struct device_driver *drv)
return 0; return 0;
} }
static int static int css_probe(struct device *dev)
css_probe (struct device *dev)
{ {
struct subchannel *sch; struct subchannel *sch;
int ret;
sch = to_subchannel(dev); sch = to_subchannel(dev);
sch->driver = to_cssdriver(dev->driver); sch->driver = to_cssdriver(dev->driver);
return (sch->driver->probe ? sch->driver->probe(sch) : 0); ret = sch->driver->probe ? sch->driver->probe(sch) : 0;
if (ret)
sch->driver = NULL;
return ret;
} }
static int static int css_remove(struct device *dev)
css_remove (struct device *dev) {
struct subchannel *sch;
int ret;
sch = to_subchannel(dev);
ret = sch->driver->remove ? sch->driver->remove(sch) : 0;
sch->driver = NULL;
return ret;
}
static void css_shutdown(struct device *dev)
{ {
struct subchannel *sch; struct subchannel *sch;
sch = to_subchannel(dev); sch = to_subchannel(dev);
return (sch->driver->remove ? sch->driver->remove(sch) : 0); if (sch->driver && sch->driver->shutdown)
}
static void
css_shutdown (struct device *dev)
{
struct subchannel *sch;
sch = to_subchannel(dev);
if (sch->driver->shutdown)
sch->driver->shutdown(sch); sch->driver->shutdown(sch);
} }