can: gs_usb: gs_usb_probe(): introduce udev and make use of it

Introduce the variable udev in the gs_usb_probe() function to hold a
pointer to the struct usb_device. This avoids recalculating the value
several times in this function.

Link: https://lore.kernel.org/all/20220309124132.291861-13-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

diff --git a/drivers/net/can/usb/gs_usb.c b/drivers/net/can/usb/gs_usb.c
index 52c8479..f56bfbe 100644 (file)
--- a/drivers/net/can/usb/gs_usb.c
+++ b/drivers/net/can/usb/gs_usb.c
@@ -885,6 +885,7 @@ static void gs_destroy_candev(struct gs_can *dev)
 static int gs_usb_probe(struct usb_interface *intf,
                        const struct usb_device_id *id)
 {
+       struct usb_device *udev = interface_to_usbdev(intf);
        struct gs_usb *dev;
        int rc = -ENOMEM;
        unsigned int icount, i;
@@ -898,8 +899,7 @@ static int gs_usb_probe(struct usb_interface *intf,
        hconf->byte_order = cpu_to_le32(0x0000beef);
 
        /* send host config */
-       rc = usb_control_msg(interface_to_usbdev(intf),
-                            usb_sndctrlpipe(interface_to_usbdev(intf), 0),
+       rc = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
                             GS_USB_BREQ_HOST_FORMAT,
                             USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_INTERFACE,
                             1, intf->cur_altsetting->desc.bInterfaceNumber,
@@ -917,8 +917,7 @@ static int gs_usb_probe(struct usb_interface *intf,
                return -ENOMEM;
 
        /* read device config */
-       rc = usb_control_msg(interface_to_usbdev(intf),
-                            usb_rcvctrlpipe(interface_to_usbdev(intf), 0),
+       rc = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
                             GS_USB_BREQ_DEVICE_CONFIG,
                             USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_INTERFACE,
                             1, intf->cur_altsetting->desc.bInterfaceNumber,
@@ -950,7 +949,7 @@ static int gs_usb_probe(struct usb_interface *intf,
        init_usb_anchor(&dev->rx_submitted);
 
        usb_set_intfdata(intf, dev);
-       dev->udev = interface_to_usbdev(intf);
+       dev->udev = udev;
 
        for (i = 0; i < icount; i++) {
                dev->canch[i] = gs_make_candev(i, intf, dconf);