scsi: hpsa: Fix allocation size for scsi_host_alloc()

The 'h' is a pointer to struct ctlr_info, so it's just 4 or 8 bytes, while
the structure itself is much bigger.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Fixes: edd1636 ("hpsa: add driver for HP Smart Array controllers.")
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Alexey V. Vissarionov <[email protected]>
Acked-by: Don Brace <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>

drivers/scsi/hpsa.c

@@ -5850,7 +5850,7 @@ static int hpsa_scsi_host_alloc(struct ctlr_info *h)
 {
 	struct Scsi_Host *sh;
 
-	sh = scsi_host_alloc(&hpsa_driver_template, sizeof(h));
+	sh = scsi_host_alloc(&hpsa_driver_template, sizeof(struct ctlr_info));
 	if (sh == NULL) {
 		dev_err(&h->pdev->dev, "scsi_host_alloc failed\n");
 		return -ENOMEM;