From fa1a8c23eb7d3ded8a3c6d0e653339a2bc7fca9e Mon Sep 17 00:00:00 2001 From: Cornelia Huck Date: Thu, 26 Apr 2007 00:12:03 -0700 Subject: [PATCH] s390: cio: Delay uevents for subchannels We often have the situation that we register a subchannel and start device recognition, only to find out that the device is not usable after all, which triggers an unregister of the subchannel. This often happens on hundreds of subchannels on a LPAR, leading to a storm of events which aren't of any use. Therefore, use uevent_suppress to delay the KOBJ_ADD uevent for a subchannel until we know that its ccw_device is to be registered. Signed-off-by: Cornelia Huck Cc: Kay Sievers Cc: Eric Rannaud Cc: Heiko Carstens Signed-off-by: Andrew Morton Signed-off-by: Greg Kroah-Hartman --- drivers/s390/cio/device.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c index 03355902c582..a23ff582db9d 100644 --- a/drivers/s390/cio/device.c +++ b/drivers/s390/cio/device.c @@ -871,6 +871,12 @@ io_subchannel_register(struct work_struct *work) } goto out; } + /* + * Now we know this subchannel will stay, we can throw + * our delayed uevent. + */ + sch->dev.uevent_suppress = 0; + kobject_uevent(&sch->dev.kobj, KOBJ_ADD); /* make it known to the system */ ret = ccw_device_register(cdev); if (ret) {