[SCSI] qla2xxx: Retrieve board serial-number and description from VPD.

Recent ISPs have this information written at manufacturing time,
so use the information.  This also reduces future churn of the
qla_devtbl.h file contents, as the driver can now depend on the
information to be present in VPD.
Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

drivers/scsi/qla2xxx/qla_attr.c

@@ -557,8 +557,10 @@ qla2x00_serial_num_show(struct device *dev, struct device_attribute *attr,
 	scsi_qla_host_t *ha = shost_priv(class_to_shost(dev));
 	uint32_t sn;
 
-	if (IS_FWI2_CAPABLE(ha))
-		return snprintf(buf, PAGE_SIZE, "\n");
+	if (IS_FWI2_CAPABLE(ha)) {
+		qla2xxx_get_vpd_field(ha, "SN", buf, PAGE_SIZE);
+		return snprintf(buf, PAGE_SIZE, "%s\n", buf);
+	}
 
 	sn = ((ha->serial0 & 0x1f) << 16) | (ha->serial2 << 8) | ha->serial1;
 	return snprintf(buf, PAGE_SIZE, "%c%05d\n", 'A' + sn / 100000,

drivers/scsi/qla2xxx/qla_def.h

@@ -2518,7 +2518,7 @@ typedef struct scsi_qla_host {
 
 	uint8_t		model_number[16+1];
 #define BINZERO		"\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"
-	char		*model_desc;
+	char		model_desc[80];
 	uint8_t		adapter_id[16+1];
 
 	uint8_t		*node_name;

drivers/scsi/qla2xxx/qla_gbl.h

@@ -314,6 +314,7 @@ extern int qla2xxx_hw_event_log(scsi_qla_host_t *, uint16_t , uint16_t,
     uint16_t, uint16_t);
 
 extern void qla2xxx_get_flash_info(scsi_qla_host_t *);
+extern int qla2xxx_get_vpd_field(scsi_qla_host_t *, char *, char *, size_t);
 
 /*
  * Global Function Prototypes in qla_dbg.c source file.

drivers/scsi/qla2xxx/qla_init.c

@@ -1501,18 +1501,25 @@ qla2x00_set_model_info(scsi_qla_host_t *ha, uint8_t *model, size_t len, char *de
 		index = (ha->pdev->subsystem_device & 0xff);
 		if (ha->pdev->subsystem_vendor == PCI_VENDOR_ID_QLOGIC &&
 		    index < QLA_MODEL_NAMES)
-			ha->model_desc = qla2x00_model_name[index * 2 + 1];
+			strncpy(ha->model_desc,
+			    qla2x00_model_name[index * 2 + 1],
+			    sizeof(ha->model_desc) - 1);
 	} else {
 		index = (ha->pdev->subsystem_device & 0xff);
 		if (ha->pdev->subsystem_vendor == PCI_VENDOR_ID_QLOGIC &&
 		    index < QLA_MODEL_NAMES) {
 			strcpy(ha->model_number,
 			    qla2x00_model_name[index * 2]);
-			ha->model_desc = qla2x00_model_name[index * 2 + 1];
+			strncpy(ha->model_desc,
+			    qla2x00_model_name[index * 2 + 1],
+			    sizeof(ha->model_desc) - 1);
 		} else {
 			strcpy(ha->model_number, def);
 		}
 	}
+	if (IS_FWI2_CAPABLE(ha))
+		qla2xxx_get_vpd_field(ha, "\x82", ha->model_desc,
+		    sizeof(ha->model_desc));
 }
 
 /* On sparc systems, obtain port and node WWN from firmware

drivers/scsi/qla2xxx/qla_sup.c

@@ -2302,6 +2302,51 @@ qla24xx_get_flash_version(scsi_qla_host_t *ha, void *mbuf)
 	return ret;
 }
 
+static int
+qla2xxx_is_vpd_valid(uint8_t *pos, uint8_t *end)
+{
+	if (pos >= end || *pos != 0x82)
+		return 0;
+
+	pos += 3 + pos[1];
+	if (pos >= end || *pos != 0x90)
+		return 0;
+
+	pos += 3 + pos[1];
+	if (pos >= end || *pos != 0x78)
+		return 0;
+
+	return 1;
+}
+
+int
+qla2xxx_get_vpd_field(scsi_qla_host_t *ha, char *key, char *str, size_t size)
+{
+	uint8_t *pos = ha->vpd;
+	uint8_t *end = pos + ha->vpd_size;
+	int len = 0;
+
+	if (!IS_FWI2_CAPABLE(ha) || !qla2xxx_is_vpd_valid(pos, end))
+		return 0;
+
+	while (pos < end && *pos != 0x78) {
+		len = (*pos == 0x82) ? pos[1] : pos[2];
+
+		if (!strncmp(pos, key, strlen(key)))
+			break;
+
+		if (*pos != 0x90 && *pos != 0x91)
+			pos += len;
+
+		pos += 3;
+	}
+
+	if (pos < end - len && *pos != 0x78)
+		return snprintf(str, size, "%.*s", len, pos + 3);
+
+	return 0;
+}
+
 static int
 qla2xxx_hw_event_store(scsi_qla_host_t *ha, uint32_t *fdata)
 {