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[libata] improve device scan

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Replace SCSI's legacy "bang at the door" method of probing with one
directly controlled by the underlying ATA transport layer.

We now only call scsi_scan_target() for devices we find, rather than
probing every possible channel/id within a certain range.
This commit is contained in:
Jeff Garzik 2005-10-03 15:55:19 -04:00
parent 87e807b6c4
commit 644dd0cc49
3 changed files with 14 additions and 1 deletions
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2
drivers/scsi/libata-core.c
View File

@ -4113,7 +4113,7 @@ int ata_device_add(struct ata_probe_ent *ent)
for (i = 0; i < count; i++) {
struct ata_port *ap = host_set->ports[i];
scsi_scan_host(ap->host);
ata_scsi_scan_host(ap);
}
dev_set_drvdata(dev, host_set);

12
drivers/scsi/libata-scsi.c
View File

@ -1678,3 +1678,15 @@ void ata_scsi_simulate(u16 *id,
}
}
void ata_scsi_scan_host(struct ata_port *ap)
{
unsigned int i;
if (ap->flags & ATA_FLAG_PORT_DISABLED)
return;
for (i = 0; i < ATA_MAX_DEVICES; i++)
if (ata_dev_present(&ap->device[i]))
scsi_scan_target(&ap->host->shost_gendev, 0, i, ~0, 0);
}

1
drivers/scsi/libata.h
View File

@ -51,6 +51,7 @@ extern void swap_buf_le16(u16 *buf, unsigned int buf_words);
/* libata-scsi.c */
extern void ata_scsi_scan_host(struct ata_port *ap);
extern void ata_to_sense_error(struct ata_queued_cmd *qc, u8 drv_stat);
extern int ata_scsi_error(struct Scsi_Host *host);
extern unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf,