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[SCSI] libsas: async ata scanning

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libsas ata error handling is already async but this does not help the
scan case.  Move initial link recovery out from under host->scan_mutex,
and delay synchronization with eh until after all port probe/recovery
work has been queued.

Device ordering is maintained with scan order by still calling
sas_rphy_add() in order of domain discovery.

Since we now scan the domain list when invoking libata-eh we need to be
careful to check for fully initialized ata ports.

Acked-by: Jack Wang <jack_wang@usish.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>
This commit is contained in:
Dan Williams
2012-01-18 20:47:01 -08:00
committed by James Bottomley
parent 92625f9bff
commit 9508a66f89
14 changed files with 125 additions and 68 deletions
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include/linux/libata.h
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@ -996,6 +996,7 @@ extern int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *dev,
extern void ata_sas_port_destroy(struct ata_port *);
extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
struct ata_port_info *, struct Scsi_Host *);
extern int ata_sas_async_port_init(struct ata_port *);
extern int ata_sas_port_init(struct ata_port *);
extern int ata_sas_port_start(struct ata_port *ap);
extern void ata_sas_port_stop(struct ata_port *ap);