[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>

diff --git a/drivers/scsi/aacraid/linit.c b/drivers/scsi/aacraid/linit.c
index fb08861..e80d2a0 100644 (file)
--- a/drivers/scsi/aacraid/linit.c
+++ b/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;