Message-ID: <20BF5713E14D5B48AA289F72BD372D680211A947@AUSXMPC122.aus.amer.dell.com>
From: Matt_Domsch@Dell.com
To: mochel@osdl.org
cc: linux-kernel@vger.kernel.org
Subject: kobject_init() sets kobj->subsys wrong?
Date: Fri, 3 Jan 2003 18:06:57 -0600
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Pat, I need your help tracking this one down... :-)

Your recent patch creating find_bus("scsi") always returns NULL.  I see
that's because bus_subsys.list is empty.  Now, why is it empty, when the
SCSI driver did a bus_register()?  It comes down to the code in
kobject_add(), where struct subsystem *s = kobj->subsys == NULL, thus the
list_add_tail code never gets called in there.  

The calls go something like this:

scsi_sysfs_register()
  bus_register(&scsi_bus_type)
    subsystem_register(scsi_bus_type->subsys)
      subsystem_init()
         kobject_init()  sets kobj->subsys = subsys_get(kobj->subsys)  which
seems wrong
	kobject_register()
	  kobject_add() where kobject->subsys is NULL

Strange, but true, and it may be kobject_init() that's borked setting
kobj->subsys.

Please advise.

Thanks,
Matt

--
Matt Domsch
Sr. Software Engineer, Lead Engineer, Architect
Dell Linux Solutions www.dell.com/linux
Linux on Dell mailing lists @ http://lists.us.dell.com

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