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authorDan Williams <dan.j.williams@intel.com>2012-06-22 02:25:27 -0400
committerJames Bottomley <JBottomley@Parallels.com>2012-07-20 03:58:45 -0400
commite4a9c3732cea3e3c8c704aad86636090ffe6b25f (patch)
treefaea8e91b3d917dcdb4c89adbb021ac737a6cb35 /include/asm-generic/word-at-a-time.h
parent3b661a92e869ebe2358de8f4b3230ad84f7fce51 (diff)
[SCSI] libata, libsas: introduce sched_eh and end_eh port ops
When managing shost->host_eh_scheduled libata assumes that there is a 1:1 shost-to-ata_port relationship. libsas creates a 1:N relationship so it needs to manage host_eh_scheduled cumulatively at the host level. The sched_eh and end_eh port port ops allow libsas to track when domain devices enter/leave the "eh-pending" state under ha->lock (previously named ha->state_lock, but it is no longer just a lock for ha->state changes). Since host_eh_scheduled indicates eh without backing commands pinning the device it can be deallocated at any time. Move the taking of the domain_device reference under the port_lock to guarantee that the ata_port stays around for the duration of eh. Reviewed-by: Jacek Danecki <jacek.danecki@intel.com> Acked-by: Jeff Garzik <jgarzik@redhat.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'include/asm-generic/word-at-a-time.h')
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