USB: xhci: replace if-elseif-else with switch-case

Replace if-elseif-else with switch-case
to keep the code consistent which is semantically same

Switch-case is used here,
http://www.spinics.net/lists/linux-usb/msg17201.html
Making consistent at other places in usb/core

Also easier to read and maintain when USB4.0, 5.0, ... comes

Signed-off-by: Viral Mehta <viral.mehta@einfochips.com>
Tested-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index 1609623ec829d43ba7f5903de249f7749943e094..ce3f453f02ef5efe5b5034f3bedfa5a062e0db25 100644 (file)
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -488,28 +488,39 @@ static int rh_call_control (struct usb_hcd *hcd, struct urb *urb)
        case DeviceRequest | USB_REQ_GET_DESCRIPTOR:
                switch (wValue & 0xff00) {
                case USB_DT_DEVICE << 8:
-                       if (hcd->driver->flags & HCD_USB3)
+                       switch (hcd->driver->flags & HCD_MASK) {
+                       case HCD_USB3:
                                bufp = usb3_rh_dev_descriptor;
-                       else if (hcd->driver->flags & HCD_USB2)
+                               break;
+                       case HCD_USB2:
                                bufp = usb2_rh_dev_descriptor;
-                       else if (hcd->driver->flags & HCD_USB11)
+                               break;
+                       case HCD_USB11:
                                bufp = usb11_rh_dev_descriptor;
-                       else
+                               break;
+                       default:
                                goto error;
+                       }
                        len = 18;
                        if (hcd->has_tt)
                                patch_protocol = 1;
                        break;
                case USB_DT_CONFIG << 8:
-                       if (hcd->driver->flags & HCD_USB3) {
+                       switch (hcd->driver->flags & HCD_MASK) {
+                       case HCD_USB3:
                                bufp = ss_rh_config_descriptor;
                                len = sizeof ss_rh_config_descriptor;
-                       } else if (hcd->driver->flags & HCD_USB2) {
+                               break;
+                       case HCD_USB2:
                                bufp = hs_rh_config_descriptor;
                                len = sizeof hs_rh_config_descriptor;
-                       } else {
+                               break;
+                       case HCD_USB11:
                                bufp = fs_rh_config_descriptor;
                                len = sizeof fs_rh_config_descriptor;
+                               break;
+                       default:
+                               goto error;
                        }
                        if (device_can_wakeup(&hcd->self.root_hub->dev))
                                patch_wakeup = 1;