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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 <[email protected]>
Acked-by: Jeff Garzik <[email protected]>
Signed-off-by: Dan Williams <[email protected]>
Signed-off-by: James Bottomley <[email protected]>
This commit is contained in:
Dan Williams 2012-01-18 20:47:01 -08:00 • committed by James Bottomley
commit 9508a66f89
14 changed files with 123 additions and 66 deletions
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38
drivers/ata/libata-core.c
View file

@ -5936,29 +5936,31 @@ void ata_host_init(struct ata_host *host, struct device *dev,
host->ops = ops;
}
void __ata_port_probe(struct ata_port *ap)
{
struct ata_eh_info *ehi = &ap->link.eh_info;
unsigned long flags;
/* kick EH for boot probing */
spin_lock_irqsave(ap->lock, flags);
ehi->probe_mask |= ATA_ALL_DEVICES;
ehi->action |= ATA_EH_RESET;
ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET;
ap->pflags &= ~ATA_PFLAG_INITIALIZING;
ap->pflags |= ATA_PFLAG_LOADING;
ata_port_schedule_eh(ap);
spin_unlock_irqrestore(ap->lock, flags);
}
int ata_port_probe(struct ata_port *ap)
{
int rc = 0;
/* probe */
if (ap->ops->error_handler) {
struct ata_eh_info *ehi = &ap->link.eh_info;
unsigned long flags;
/* kick EH for boot probing */
spin_lock_irqsave(ap->lock, flags);
ehi->probe_mask |= ATA_ALL_DEVICES;
ehi->action |= ATA_EH_RESET;
ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET;
ap->pflags &= ~ATA_PFLAG_INITIALIZING;
ap->pflags |= ATA_PFLAG_LOADING;
ata_port_schedule_eh(ap);
spin_unlock_irqrestore(ap->lock, flags);
/* wait for EH to finish */
__ata_port_probe(ap);
ata_port_wait_eh(ap);
} else {
DPRINTK("ata%u: bus probe begin\n", ap->print_id);

13
drivers/ata/libata-scsi.c
View file

@ -3838,6 +3838,19 @@ void ata_sas_port_stop(struct ata_port *ap)
}
EXPORT_SYMBOL_GPL(ata_sas_port_stop);
int ata_sas_async_port_init(struct ata_port *ap)
{
int rc = ap->ops->port_start(ap);
if (!rc) {
ap->print_id = ata_print_id++;
__ata_port_probe(ap);
}
return rc;
}
EXPORT_SYMBOL_GPL(ata_sas_async_port_init);
/**
* ata_sas_port_init - Initialize a SATA device
* @ap: SATA port to initialize

1
drivers/ata/libata.h
View file

@ -105,6 +105,7 @@ extern int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg);
extern struct ata_port *ata_port_alloc(struct ata_host *host);
extern const char *sata_spd_string(unsigned int spd);
extern int ata_port_probe(struct ata_port *ap);
extern void __ata_port_probe(struct ata_port *ap);
/* libata-acpi.c */
#ifdef CONFIG_ATA_ACPI