IB/usnic: Support device FW version string

And remove sysfs file in favor of the common core.
Reviewed-by: NDennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: NIra Weiny <ira.weiny@intel.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

drivers/infiniband/hw/usnic/usnic_ib_main.c

@@ -331,6 +331,21 @@ static int usnic_port_immutable(struct ib_device *ibdev, u8 port_num,
 	return 0;
 }
 
+static void usnic_get_dev_fw_str(struct ib_device *device,
+				 char *str,
+				 size_t str_len)
+{
+	struct usnic_ib_dev *us_ibdev =
+		container_of(device, struct usnic_ib_dev, ib_dev);
+	struct ethtool_drvinfo info;
+
+	mutex_lock(&us_ibdev->usdev_lock);
+	us_ibdev->netdev->ethtool_ops->get_drvinfo(us_ibdev->netdev, &info);
+	mutex_unlock(&us_ibdev->usdev_lock);
+
+	snprintf(str, str_len, "%s", info.fw_version);
+}
+
 /* Start of PF discovery section */
 static void *usnic_ib_device_add(struct pci_dev *dev)
 {
@@ -414,6 +429,7 @@ static void *usnic_ib_device_add(struct pci_dev *dev)
 	us_ibdev->ib_dev.req_notify_cq = usnic_ib_req_notify_cq;
 	us_ibdev->ib_dev.get_dma_mr = usnic_ib_get_dma_mr;
 	us_ibdev->ib_dev.get_port_immutable = usnic_port_immutable;
+	us_ibdev->ib_dev.get_dev_fw_str     = usnic_get_dev_fw_str;
 
 
 	if (ib_register_device(&us_ibdev->ib_dev, NULL))

drivers/infiniband/hw/usnic/usnic_ib_sysfs.c

@@ -45,21 +45,6 @@
 #include "usnic_ib_verbs.h"
 #include "usnic_log.h"
 
-static ssize_t usnic_ib_show_fw_ver(struct device *device,
-					struct device_attribute *attr,
-					char *buf)
-{
-	struct usnic_ib_dev *us_ibdev =
-		container_of(device, struct usnic_ib_dev, ib_dev.dev);
-	struct ethtool_drvinfo info;
-
-	mutex_lock(&us_ibdev->usdev_lock);
-	us_ibdev->netdev->ethtool_ops->get_drvinfo(us_ibdev->netdev, &info);
-	mutex_unlock(&us_ibdev->usdev_lock);
-
-	return scnprintf(buf, PAGE_SIZE, "%s\n", info.fw_version);
-}
-
 static ssize_t usnic_ib_show_board(struct device *device,
 					struct device_attribute *attr,
 					char *buf)
@@ -192,7 +177,6 @@ usnic_ib_show_cq_per_vf(struct device *device, struct device_attribute *attr,
 			us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_CQ]);
 }
 
-static DEVICE_ATTR(fw_ver, S_IRUGO, usnic_ib_show_fw_ver, NULL);
 static DEVICE_ATTR(board_id, S_IRUGO, usnic_ib_show_board, NULL);
 static DEVICE_ATTR(config, S_IRUGO, usnic_ib_show_config, NULL);
 static DEVICE_ATTR(iface, S_IRUGO, usnic_ib_show_iface, NULL);
@@ -201,7 +185,6 @@ static DEVICE_ATTR(qp_per_vf, S_IRUGO, usnic_ib_show_qp_per_vf, NULL);
 static DEVICE_ATTR(cq_per_vf, S_IRUGO, usnic_ib_show_cq_per_vf, NULL);
 
 static struct device_attribute *usnic_class_attributes[] = {
-	&dev_attr_fw_ver,
 	&dev_attr_board_id,
 	&dev_attr_config,
 	&dev_attr_iface,