[PATCH 6/7] net: huawei_cdc_ncm: add usbnet -> priv function

[Ben Dooks]

There are a number of places in the huawei driver where it gets the
private-data from the usbnet passed in. It would be sensible to have
one inline function to convert it and change all points in the driver
to use that.

Signed-off-by: Ben Dooks <ben.do...@codethink.co.uk>
---
---
 drivers/net/usb/huawei_cdc_ncm.c | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/drivers/net/usb/huawei_cdc_ncm.c b/drivers/net/usb/huawei_cdc_ncm.c
index 63f28908afda..d290b8c318be 100644
--- a/drivers/net/usb/huawei_cdc_ncm.c
+++ b/drivers/net/usb/huawei_cdc_ncm.c
@@ -38,9 +38,14 @@ struct huawei_cdc_ncm_state {
        struct usb_interface *data;
 };
 
+static inline struct huawei_cdc_ncm_state *usbnet_to_state(struct usbnet *usb)
+{
+       return (struct huawei_cdc_ncm_state *)&usb->data;
+}
+
 static int huawei_cdc_ncm_manage_power(struct usbnet *usbnet_dev, int on)
 {
-       struct huawei_cdc_ncm_state *drvstate = (void *)&usbnet_dev->data;
+       struct huawei_cdc_ncm_state *drvstate = usbnet_to_state(usbnet_dev);
        int rv;
 
        if ((on && atomic_add_return(1, &drvstate->pmcount) == 1) ||
@@ -72,7 +77,7 @@ static int huawei_cdc_ncm_bind(struct usbnet *usbnet_dev,
        struct cdc_ncm_ctx *ctx;
        struct usb_driver *subdriver = ERR_PTR(-ENODEV);
        int ret = -ENODEV;
-       struct huawei_cdc_ncm_state *drvstate = (void *)&usbnet_dev->data;
+       struct huawei_cdc_ncm_state *drvstate = usbnet_to_state(usbnet_dev);
        int drvflags = 0;
 
        /* altsetting should always be 1 for NCM devices - so we hard-coded
@@ -119,7 +124,7 @@ static int huawei_cdc_ncm_bind(struct usbnet *usbnet_dev,
 static void huawei_cdc_ncm_unbind(struct usbnet *usbnet_dev,
                                  struct usb_interface *intf)
 {
-       struct huawei_cdc_ncm_state *drvstate = (void *)&usbnet_dev->data;
+       struct huawei_cdc_ncm_state *drvstate = usbnet_to_state(usbnet_dev);
        struct cdc_ncm_ctx *ctx = drvstate->ctx;
 
        if (drvstate->subdriver && drvstate->subdriver->disconnect)
@@ -134,7 +139,7 @@ static int huawei_cdc_ncm_suspend(struct usb_interface 
*intf,
 {
        int ret = 0;
        struct usbnet *usbnet_dev = usb_get_intfdata(intf);
-       struct huawei_cdc_ncm_state *drvstate = (void *)&usbnet_dev->data;
+       struct huawei_cdc_ncm_state *drvstate = usbnet_to_state(usbnet_dev);
        struct cdc_ncm_ctx *ctx = drvstate->ctx;
 
        if (ctx == NULL) {
@@ -161,7 +166,7 @@ static int huawei_cdc_ncm_resume(struct usb_interface *intf)
 {
        int ret = 0;
        struct usbnet *usbnet_dev = usb_get_intfdata(intf);
-       struct huawei_cdc_ncm_state *drvstate = (void *)&usbnet_dev->data;
+       struct huawei_cdc_ncm_state *drvstate = usbnet_to_state(usbnet_dev);
        bool callsub;
        struct cdc_ncm_ctx *ctx = drvstate->ctx;
 
-- 
2.19.1