[SCSI] aacraid: pci_set_dma_max_seg_size opened up for late model controllers

This patch ensures that the modern adapters get a maximum sg segment
size on par with the maximum transfer size. Added some localized
janitor fixes to the discussion patch I used with Fujita.

FUJITA Tomonori [mailto:fujita.tomonori@lab.ntt.co.jp] sez:
> I think that setting the proper maximum segment size for the late
> model cards (as you did above) makes sense.
Signed-off-by: Mark Salyzyn <aacraid@adaptec.com>
Cc: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

drivers/scsi/aacraid/linit.c

@@ -1130,31 +1130,29 @@ static int __devinit aac_probe_one(struct pci_dev *pdev,
 	if (error < 0)
 		goto out_deinit;
 
-	if (!(aac->adapter_info.options & AAC_OPT_NEW_COMM)) {
-		error = pci_set_dma_max_seg_size(pdev, 65536);
-		if (error)
-			goto out_deinit;
-	}
-
 	/*
  	 * Lets override negotiations and drop the maximum SG limit to 34
  	 */
 	if ((aac_drivers[index].quirks & AAC_QUIRK_34SG) &&
-			(aac->scsi_host_ptr->sg_tablesize > 34)) {
- 		aac->scsi_host_ptr->sg_tablesize = 34;
- 		aac->scsi_host_ptr->max_sectors
- 		  = (aac->scsi_host_ptr->sg_tablesize * 8) + 112;
+			(shost->sg_tablesize > 34)) {
+		shost->sg_tablesize = 34;
+		shost->max_sectors = (shost->sg_tablesize * 8) + 112;
  	}
 
  	if ((aac_drivers[index].quirks & AAC_QUIRK_17SG) &&
-			(aac->scsi_host_ptr->sg_tablesize > 17)) {
- 		aac->scsi_host_ptr->sg_tablesize = 17;
- 		aac->scsi_host_ptr->max_sectors
- 		  = (aac->scsi_host_ptr->sg_tablesize * 8) + 112;
+			(shost->sg_tablesize > 17)) {
+		shost->sg_tablesize = 17;
+		shost->max_sectors = (shost->sg_tablesize * 8) + 112;
  	}
 
+	error = pci_set_dma_max_seg_size(pdev,
+		(aac->adapter_info.options & AAC_OPT_NEW_COMM) ?
+			(shost->max_sectors << 9) : 65536);
+	if (error)
+		goto out_deinit;
+
 	/*
-	 * Firware printf works only with older firmware.
+	 * Firmware printf works only with older firmware.
 	 */
 	if (aac_drivers[index].quirks & AAC_QUIRK_34SG)
 		aac->printf_enabled = 1;