From 81c757bc696284f39f07766f0c2ca67af64ce9bd Mon Sep 17 00:00:00 2001 From: Dan Williams Date: Fri, 2 Dec 2011 16:07:01 -0800 Subject: [SCSI] libsas: execute transport link resets with libata-eh via host workqueue Link resets leave ata affiliations intact, so arrange for libsas to make an effort to avoid dropping the device due to a slow-to-recover link. Towards this end carry out reset in the host workqueue so that it can check for ata devices and kick the reset request to libata. Hard resets, in contrast, bypass libata since they are meant for associating an ata device with another initiator in the domain (tears down affiliations). Need to add a new transport_sas_phy_reset() since the current sas_phy_reset() is a utility function to libsas lldds. They are not prepared for it to loop back into eh. Signed-off-by: Dan Williams Signed-off-by: James Bottomley --- include/scsi/sas_ata.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'include/scsi/sas_ata.h') diff --git a/include/scsi/sas_ata.h b/include/scsi/sas_ata.h index c0bcd30..da3f377 100644 --- a/include/scsi/sas_ata.h +++ b/include/scsi/sas_ata.h @@ -45,6 +45,7 @@ int sas_ata_eh(struct Scsi_Host *shost, struct list_head *work_q, struct list_head *done_q); void sas_probe_sata(struct work_struct *work); void sas_ata_schedule_reset(struct domain_device *dev); +void sas_ata_wait_eh(struct domain_device *dev); #else @@ -79,6 +80,9 @@ static inline void sas_ata_schedule_reset(struct domain_device *dev) { } +static inline void sas_ata_wait_eh(struct domain_device *dev) +{ +} #endif #endif /* _SAS_ATA_H_ */ -- cgit v1.1