[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>
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index cece3a4..3fe1202 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -80,6 +80,8 @@
.prereset = ata_std_prereset,
.postreset = ata_std_postreset,
.error_handler = ata_std_error_handler,
+ .sched_eh = ata_std_sched_eh,
+ .end_eh = ata_std_end_eh,
};
const struct ata_port_operations sata_port_ops = {
@@ -6642,6 +6644,8 @@
.qc_prep = ata_noop_qc_prep,
.qc_issue = ata_dummy_qc_issue,
.error_handler = ata_dummy_error_handler,
+ .sched_eh = ata_std_sched_eh,
+ .end_eh = ata_std_end_eh,
};
const struct ata_port_info ata_dummy_port_info = {