scsi: mpt3sas: Use cached ATA Information VPD page

We now cache VPD page 0x89 (ATA Information) so there is no need to request
it from the hardware. Make mpt3sas use the cached page.

Link: https://lore.kernel.org/r/20220302053559.32147-2-martin.petersen@oracle.com
Cc: Sreekanth Reddy <sreekanth.reddy@broadcom.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/mpt3sas/mpt3sas_scsih.c

@@ -12588,20 +12588,18 @@ scsih_pci_mmio_enabled(struct pci_dev *pdev)
  */
 bool scsih_ncq_prio_supp(struct scsi_device *sdev)
 {
-	unsigned char *buf;
+	struct scsi_vpd *vpd;
 	bool ncq_prio_supp = false;
 
-	if (!scsi_device_supports_vpd(sdev))
-		return ncq_prio_supp;
-
-	buf = kmalloc(SCSI_VPD_PG_LEN, GFP_KERNEL);
-	if (!buf)
-		return ncq_prio_supp;
+	rcu_read_lock();
+	vpd = rcu_dereference(sdev->vpd_pg89);
+	if (!vpd || vpd->len < 214)
+		goto out;
 
-	if (!scsi_get_vpd_page(sdev, 0x89, buf, SCSI_VPD_PG_LEN))
-		ncq_prio_supp = (buf[213] >> 4) & 1;
+	ncq_prio_supp = (vpd->data[213] >> 4) & 1;
+out:
+	rcu_read_unlock();
 
-	kfree(buf);
 	return ncq_prio_supp;
 }
 /*