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authorDan Williams <dan.j.williams@intel.com>2011-11-17 17:59:47 -0800
committerJames Bottomley <JBottomley@Parallels.com>2012-02-19 13:37:47 -0600
commit735f7d2fedf57380214221be7bed7f62d729e262 (patch)
tree067db49c22dcbdf695a6517a6c8664b6bb2c2d32 /Documentation/scsi
parent6f4e75a49fd07d707995865493b9f452302ae36b (diff)
downloadlinux-735f7d2fedf57380214221be7bed7f62d729e262.tar.gz
[SCSI] libsas: fix domain_device leak
Arrange for the deallocation of a struct domain_device object when it no longer has: 1/ any children 2/ references by any scsi_targets 3/ references by a lldd The comment about domain_device lifetime in Documentation/scsi/libsas.txt is stale as it appears mainline never had a version of a struct domain_device that was registered as a kobject. We now manage domain_device reference counts on behalf of external agents. Reviewed-by: Jack Wang <jack_wang@usish.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'Documentation/scsi')
-rw-r--r--Documentation/scsi/libsas.txt15
1 files changed, 0 insertions, 15 deletions
diff --git a/Documentation/scsi/libsas.txt b/Documentation/scsi/libsas.txt
index aa54f54c4a5..3cc9c7843e1 100644
--- a/Documentation/scsi/libsas.txt
+++ b/Documentation/scsi/libsas.txt
@@ -398,21 +398,6 @@ struct sas_task {
task_done -- callback when the task has finished execution
};
-When an external entity, entity other than the LLDD or the
-SAS Layer, wants to work with a struct domain_device, it
-_must_ call kobject_get() when getting a handle on the
-device and kobject_put() when it is done with the device.
-
-This does two things:
- A) implements proper kfree() for the device;
- B) increments/decrements the kref for all players:
- domain_device
- all domain_device's ... (if past an expander)
- port
- host adapter
- pci device
- and up the ladder, etc.
-
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