[SCSI] qla2xxx: Add sysfs node for displaying board temperature.

Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: Madhuranath Iyengar <Madhu.Iyengar@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

1 files changed, 27 insertions, 0 deletions

diff --git a/drivers/scsi/qla2xxx/qla_attr.c b/drivers/scsi/qla2xxx/qla_attr.c
index bc8194f74625..44578b56ad0a 100644
--- a/drivers/scsi/qla2xxx/qla_attr.c
+++ b/drivers/scsi/qla2xxx/qla_attr.c
@@ -1309,6 +1309,31 @@ qla2x00_fabric_param_show(struct device *dev, struct device_attribute *attr,
 }
 
 static ssize_t
+qla2x00_thermal_temp_show(struct device *dev,
+        struct device_attribute *attr, char *buf)
+{
+        scsi_qla_host_t *vha = shost_priv(class_to_shost(dev));
+        int rval = QLA_FUNCTION_FAILED;
+        uint16_t temp, frac;
+
+        if (!vha->hw->flags.thermal_supported)
+                return snprintf(buf, PAGE_SIZE, "\n");
+
+        temp = frac = 0;
+        if (test_bit(ABORT_ISP_ACTIVE, &vha->dpc_flags) ||
+            test_bit(ISP_ABORT_NEEDED, &vha->dpc_flags))
+                DEBUG2_3_11(printk(KERN_WARNING
+                    "%s(%ld): isp reset in progress.\n",
+                    __func__, vha->host_no));
+        else if (!vha->hw->flags.eeh_busy)
+                rval = qla2x00_get_thermal_temp(vha, &temp, &frac);
+        if (rval != QLA_SUCCESS)
+                temp = frac = 0;
+
+        return snprintf(buf, PAGE_SIZE, "%d.%02d\n", temp, frac);
+}
+
+static ssize_t
 qla2x00_fw_state_show(struct device *dev, struct device_attribute *attr,
     char *buf)
 {
@@ -1366,6 +1391,7 @@ static DEVICE_ATTR(vn_port_mac_address, S_IRUGO,
                    qla2x00_vn_port_mac_address_show, NULL);
 static DEVICE_ATTR(fabric_param, S_IRUGO, qla2x00_fabric_param_show, NULL);
 static DEVICE_ATTR(fw_state, S_IRUGO, qla2x00_fw_state_show, NULL);
+static DEVICE_ATTR(thermal_temp, S_IRUGO, qla2x00_thermal_temp_show, NULL);
 
 struct device_attribute *qla2x00_host_attrs[] = {
         &dev_attr_driver_version,
@@ -1394,6 +1420,7 @@ struct device_attribute *qla2x00_host_attrs[] = {
         &dev_attr_fabric_param,
         &dev_attr_fw_state,
         &dev_attr_optrom_gold_fw_version,
+        &dev_attr_thermal_temp,
         NULL,
 };