[PATCH] 3ware: use scsi_scan_target()

[Jeff Garzik <jgarzik@pobox.com>]

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This change updates the 3ware raid drivers to use scsi_scan_target(), 
rather than scsi_scan_host().  This is especially nice for 3w-xxxx, 
which does not support LUNs.  The device scan is a bit quicker and more 
direct, even if it is a tiny bit more code in the driver.

Patch untested.

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diff --git a/drivers/scsi/3w-9xxx.c b/drivers/scsi/3w-9xxx.c
--- a/drivers/scsi/3w-9xxx.c
+++ b/drivers/scsi/3w-9xxx.c
@@ -1992,7 +1992,7 @@ static int __devinit twa_probe(struct pc
 	struct Scsi_Host *host = NULL;
 	TW_Device_Extension *tw_dev;
 	u32 mem_addr;
-	int retval = -ENODEV;
+	int retval = -ENODEV, i;
 
 	retval = pci_enable_device(pdev);
 	if (retval) {
@@ -2092,7 +2092,8 @@ static int __devinit twa_probe(struct pc
 	TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev);
 
 	/* Finally, scan the host */
-	scsi_scan_host(host);
+	for (i = 0; i < TW_MAX_UNITS; i++)
+		scsi_scan_target(&host->shost_gendev, 0, i, ~0, 0);
 
 	if (twa_major == -1) {
 		if ((twa_major = register_chrdev (0, "twa", &twa_fops)) < 0)
diff --git a/drivers/scsi/3w-xxxx.c b/drivers/scsi/3w-xxxx.c
--- a/drivers/scsi/3w-xxxx.c
+++ b/drivers/scsi/3w-xxxx.c
@@ -2315,7 +2315,7 @@ static int __devinit tw_probe(struct pci
 {
 	struct Scsi_Host *host = NULL;
 	TW_Device_Extension *tw_dev;
-	int retval = -ENODEV;
+	int retval = -ENODEV, i;
 
 	retval = pci_enable_device(pdev);
 	if (retval) {
@@ -2404,7 +2404,8 @@ static int __devinit tw_probe(struct pci
 	TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev);
 
 	/* Finally, scan the host */
-	scsi_scan_host(host);
+	for (i = 0; i < TW_MAX_UNITS; i++)
+		scsi_scan_target(&host->shost_gendev, 0, i, 0, 0);
 
 	if (twe_major == -1) {
 		if ((twe_major = register_chrdev (0, "twe", &tw_fops)) < 0)