e4a9c3732c
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>
96 lines
2.5 KiB
C
96 lines
2.5 KiB
C
/*
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* Support for SATA devices on Serial Attached SCSI (SAS) controllers
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*
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* Copyright (C) 2006 IBM Corporation
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*
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* Written by: Darrick J. Wong <djwong@us.ibm.com>, IBM Corporation
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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* USA
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*
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*/
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#ifndef _SAS_ATA_H_
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#define _SAS_ATA_H_
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#include <linux/libata.h>
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#include <scsi/libsas.h>
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#ifdef CONFIG_SCSI_SAS_ATA
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static inline int dev_is_sata(struct domain_device *dev)
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{
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return dev->dev_type == SATA_DEV || dev->dev_type == SATA_PM ||
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dev->dev_type == SATA_PM_PORT || dev->dev_type == SATA_PENDING;
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}
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int sas_get_ata_info(struct domain_device *dev, struct ex_phy *phy);
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int sas_ata_init(struct domain_device *dev);
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void sas_ata_task_abort(struct sas_task *task);
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void sas_ata_strategy_handler(struct Scsi_Host *shost);
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void sas_ata_eh(struct Scsi_Host *shost, struct list_head *work_q,
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struct list_head *done_q);
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void sas_ata_schedule_reset(struct domain_device *dev);
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void sas_ata_wait_eh(struct domain_device *dev);
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void sas_probe_sata(struct asd_sas_port *port);
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void sas_ata_end_eh(struct ata_port *ap);
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#else
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static inline int dev_is_sata(struct domain_device *dev)
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{
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return 0;
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}
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static inline int sas_ata_init(struct domain_device *dev)
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{
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return 0;
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}
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static inline void sas_ata_task_abort(struct sas_task *task)
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{
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}
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static inline void sas_ata_strategy_handler(struct Scsi_Host *shost)
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{
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}
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static inline void sas_ata_eh(struct Scsi_Host *shost, struct list_head *work_q,
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struct list_head *done_q)
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{
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}
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static inline void sas_ata_schedule_reset(struct domain_device *dev)
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{
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}
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static inline void sas_ata_wait_eh(struct domain_device *dev)
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{
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}
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static inline void sas_probe_sata(struct asd_sas_port *port)
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{
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}
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static inline int sas_get_ata_info(struct domain_device *dev, struct ex_phy *phy)
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{
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return 0;
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}
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static inline void sas_ata_end_eh(struct ata_port *ap)
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{
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}
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#endif
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#endif /* _SAS_ATA_H_ */
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