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27 March 2024, 02:37:15 UTC
Revision a1470c7bf3a4676e62e4c0fb204e339399eb5c59 authored by James Bottomley on 15 November 2013, 22:58:00 UTC, committed by James Bottomley on 02 December 2013, 19:13:14 UTC 
[SCSI] enclosure: fix WARN_ON in dual path device removing
 
Bug report from: wenxiong@linux.vnet.ibm.com

The issue is happened in dual controller configuration. We got the
sysfs warnings when rmmod the ipr module.

enclosure_unregister() in drivers/msic/enclosure.c, call device_unregister()
for each componment deivce, device_unregister() ->device_del()->kobject_del()
->sysfs_remove_dir(). In sysfs_remove_dir(), set kobj->sd = NULL.

For each componment device,
enclosure_component_release()->enclosure_remove_links()->sysfs_remove_link()
in which checking kobj->sd again, it has been set as NULL when doing
device_unregister. So we saw all these sysfs WARNING.

Tested-by: wenxiong@linux.vnet.ibm.com
Cc: stable@vger.kernel.org
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
1 parent 6cd60b3
History
Tip revision: a1470c7bf3a4676e62e4c0fb204e339399eb5c59 authored by James Bottomley on 15 November 2013, 22:58:00 UTC
[SCSI] enclosure: fix WARN_ON in dual path device removing
Tip revision: a1470c7
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