From: Moore, Eric Date: Tue, 14 Mar 2006 16:14:24 +0000 (-0700) Subject: [SCSI] fusion - expander hotplug suport in mptsas module X-Git-Tag: v2.6.17-rc1~1129^2~4^2~10 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e6b2d76a49f0ee48527691867d8af2b8f9c10452;p=pandora-kernel.git [SCSI] fusion - expander hotplug suport in mptsas module This adds support for hot adding and removing expanders, and its associated attached devices. When there is a change in topology, the fusion firmware sends the MPI_EVENT_SAS_DISCOVERY event to the driver. The driver will read firmware config pages to determine what changes took place, and refresh drivers view of the world stored in ioc->sas_topology. Here is the details of the action the driver does: (1) Expander Added : The mptsas_discovery_work workqueue is called. Config pages read, and ioc->sas_topology is refreshed. The sas_phy_add() is called for each phy of the expander. The expanders attached devices are added via sas_rphy_add(). Added end devices are handled within the MPT_ADD_DEVICE logic in mptsas_hotplug_work workqueue. (2) Expander Delete : The sas_rphy_delete() will be called for the top most compenent of the parent that the expander is attached to. The sas_rphy_delete call will delete all the children phys, rphys, and end devices. This is handled from mptsas_discovery_work workqueue. Signed-off-by: Eric Moore Signed-off-by: James Bottomley --- Reading git-diff-tree failed