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[SCSI] libsas: perform sas-transport resets in shost->workq context

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Extend the sas transport class to allow transport users to attach extra
data to a sas_phy (->hostdata).  Use this area in libsas to move resets
to workq context in preparation for scheduling ata device resets through
libata-eh.

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
2011-12-20 01:03:48 -08:00
committed by James Bottomley
parent b52df4174d
commit 0b3e09da13
5 changed files with 90 additions and 4 deletions
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5
include/scsi/scsi_transport_sas.h
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@@ -75,7 +75,8 @@ struct sas_phy {
/* for the list of phys belonging to a port */
struct list_head port_siblings;
struct work_struct reset_work;
/* available to the lldd */
void *hostdata;
};
#define dev_to_phy(d) \
@@ -169,6 +170,8 @@ struct sas_function_template {
int (*get_bay_identifier)(struct sas_rphy *);
int (*phy_reset)(struct sas_phy *, int);
int (*phy_enable)(struct sas_phy *, int);
int (*phy_setup)(struct sas_phy *);
void (*phy_release)(struct sas_phy *);
int (*set_phy_speed)(struct sas_phy *, struct sas_phy_linkrates *);
int (*smp_handler)(struct Scsi_Host *, struct sas_rphy *, struct request *);
};