[src/trunk]: src/sys/dev/usb PR/52791: Robert Sprowson: avoid duplicate tests...

[christos <christos%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/2d579b36eb48
branches:  trunk
changeset: 358006:2d579b36eb48
user:      christos <christos%NetBSD.org@localhost>
date:      Thu Dec 07 22:56:23 2017 +0000

description:
PR/52791: Robert Sprowson: avoid duplicate tests (use accessor variables)

diffstat:

 sys/dev/usb/xhci.c |  28 ++++++++++++----------------
 1 files changed, 12 insertions(+), 16 deletions(-)

diffs (69 lines):

diff -r 2dc9d182b7a6 -r 2d579b36eb48 sys/dev/usb/xhci.c
--- a/sys/dev/usb/xhci.c        Thu Dec 07 22:23:14 2017 +0000
+++ b/sys/dev/usb/xhci.c        Thu Dec 07 22:56:23 2017 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: xhci.c,v 1.77 2017/11/17 08:22:02 skrll Exp $  */
+/*     $NetBSD: xhci.c,v 1.78 2017/12/07 22:56:23 christos Exp $       */
 
 /*
  * Copyright (c) 2013 Jonathan A. Kollasch
@@ -34,7 +34,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: xhci.c,v 1.77 2017/11/17 08:22:02 skrll Exp $");
+__KERNEL_RCSID(0, "$NetBSD: xhci.c,v 1.78 2017/12/07 22:56:23 christos Exp $");
 
 #ifdef _KERNEL_OPT
 #include "opt_usb.h"
@@ -3154,6 +3154,8 @@
 xhci_setup_tthub(struct usbd_pipe *pipe, uint32_t *cp)
 {
        struct usbd_device *dev = pipe->up_dev;
+       struct usbd_device *myhub = dev->ud_myhub;
+       struct usbd_port *myhsport = dev->ud_myhsport;
        usb_device_descriptor_t * const dd = &dev->ud_ddesc;
        uint32_t speed = dev->ud_speed;
        uint8_t tthubslot, ttportnum;
@@ -3177,19 +3179,17 @@
         *   parent hub is not HS hub ||
         *   attached to root hub.
         */
-       if (dev->ud_myhsport != NULL &&
-           dev->ud_myhub != NULL && dev->ud_myhub->ud_depth != 0 &&
-           (dev->ud_myhub != NULL &&
-            dev->ud_myhub->ud_speed == USB_SPEED_HIGH) &&
+       if (myhsport && myhub && myhub->ud_depth &&
+           myhub->ud_speed == USB_SPEED_HIGH &&
            (speed == USB_SPEED_LOW || speed == USB_SPEED_FULL)) {
-               ttportnum = dev->ud_myhsport->up_portno;
-               tthubslot = dev->ud_myhsport->up_parent->ud_addr;
+               ttportnum = myhsport->up_portno;
+               tthubslot = myhsport->up_parent->ud_addr;
        } else {
                ttportnum = 0;
                tthubslot = 0;
        }
        DPRINTFN(4, "myhsport %#jx ttportnum=%jd tthubslot=%jd",
-           (uintptr_t)dev->ud_myhsport, ttportnum, tthubslot, 0);
+           (uintptr_t)myhsport, ttportnum, tthubslot, 0);
 
        /* ishub is valid after reading UDESC_DEVICE */
        ishub = (dd->bDeviceClass == UDCLASS_HUB);
@@ -3218,13 +3218,9 @@
         */
        if (ishub && speed == USB_SPEED_HIGH && IS_TTHUB(dd))
                usemtt = true;
-       else if (!ishub &&
-            (speed == USB_SPEED_LOW || speed == USB_SPEED_FULL) &&
-            dev->ud_myhub != NULL && dev->ud_myhub->ud_depth != 0 &&
-            (dev->ud_myhub != NULL &&
-             dev->ud_myhub->ud_speed == USB_SPEED_HIGH) &&
-            dev->ud_myhsport != NULL &&
-            IS_TTHUB(&dev->ud_myhsport->up_parent->ud_ddesc))
+       else if (!ishub && (speed == USB_SPEED_LOW || speed == USB_SPEED_FULL) &&
+            myhub && myhub->ud_depth && myhub->ud_speed == USB_SPEED_HIGH &&
+            myhsport && IS_TTHUB(&myhsport->up_parent->ud_ddesc))
                usemtt = true;
        else
                usemtt = false;