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s390/ccwgroup: simplify ungrouping when driver deregisters 

driver_unregister() ends up calling __device_release_driver() for
each device that is bound to the driver. Thus ccwgroup_notifier() will
see a BUS_NOTIFY_UNBIND_DRIVER event for these ccwgroup devices, and
trigger the ungrouping.

So there's no need to also trigger the ungrouping from within
ccwgroup_driver_unregister(), remove it.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Reviewed-by: Vineeth Vijayan <vneethv@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
This commit is contained in:
Julian Wiedmann 2021-05-05 10:25:14 +02:00 committed by Vasily Gorbik
parent 31aae32ca1
commit 428b7f5983
1 changed files with 0 additions and 9 deletions
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9
drivers/s390/cio/ccwgroup.c
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@ -499,15 +499,6 @@ EXPORT_SYMBOL(ccwgroup_driver_register);
*/
void ccwgroup_driver_unregister(struct ccwgroup_driver *cdriver)
{
struct device *dev;
/* We don't want ccwgroup devices to live longer than their driver. */
while ((dev = driver_find_next_device(&cdriver->driver, NULL))) {
struct ccwgroup_device *gdev = to_ccwgroupdev(dev);
ccwgroup_ungroup(gdev);
put_device(dev);
}
driver_unregister(&cdriver->driver);
}
EXPORT_SYMBOL(ccwgroup_driver_unregister);