The attached patch changes libata device scanning from using the legacy
"bang at the door" method of probing devices, to one that calls
scsi_scan_target() for each target (ATA device) that the libata
transport layer found.
Completely untested, feedback welcome. This should improve the speed of
SATA probing a tad, and certainly makes it quite a bit less ugly.
This might get moved, eventually, into an ATA transport class, depending
on how things shape up in the future.
Jeff
diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c
--- a/drivers/scsi/libata-core.c
+++ b/drivers/scsi/libata-core.c
@@ -4113,7 +4113,7 @@ int ata_device_add(struct ata_probe_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);
diff --git a/drivers/scsi/libata-scsi.c b/drivers/scsi/libata-scsi.c
--- a/drivers/scsi/libata-scsi.c
+++ b/drivers/scsi/libata-scsi.c
@@ -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);
+}
+
diff --git a/drivers/scsi/libata.h b/drivers/scsi/libata.h
--- a/drivers/scsi/libata.h
+++ b/drivers/scsi/libata.h
@@ -51,6 +51,7 @@ extern void swap_buf_le16(u16 *buf, unsi
/* 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,
