usb: hub: rename khubd to hub_wq in documentation and comments

USB hub has started to use a workqueue instead of kthread. Let's update
the documentation and comments here and there.

This patch mostly just replaces "khubd" with "hub_wq". There are only few
exceptions where the whole sentence was updated. These more complicated
changes can be found in the following files:

	   Documentation/usb/hotplug.txt
	   drivers/net/usb/usbnet.c
	   drivers/usb/core/hcd.c
	   drivers/usb/host/ohci-hcd.c
	   drivers/usb/host/xhci.c

Signed-off-by: Petr Mladek <pmladek@suse.cz>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 8 insertions, 6 deletions

diff --git a/drivers/net/usb/usbnet.c b/drivers/net/usb/usbnet.c
index 5173821a9575..20615bbd693b 100644
--- a/drivers/net/usb/usbnet.c
+++ b/drivers/net/usb/usbnet.c
@@ -69,8 +69,9 @@
 // reawaken network queue this soon after stopping; else watchdog barks
 #define TX_TIMEOUT_JIFFIES      (5*HZ)
 
-// throttle rx/tx briefly after some faults, so khubd might disconnect()
-// us (it polls at HZ/4 usually) before we report too many false errors.
+/* throttle rx/tx briefly after some faults, so hub_wq might disconnect()
+ * us (it polls at HZ/4 usually) before we report too many false errors.
+ */
 #define THROTTLE_JIFFIES        (HZ/8)
 
 // between wakeups
@@ -595,9 +596,9 @@ static void rx_complete (struct urb *urb)
                           "rx shutdown, code %d\n", urb_status);
                 goto block;
 
-        /* we get controller i/o faults during khubd disconnect() delays.
+        /* we get controller i/o faults during hub_wq disconnect() delays.
          * throttle down resubmits, to avoid log floods; just temporarily,
-         * so we still recover when the fault isn't a khubd delay.
+         * so we still recover when the fault isn't a hub_wq delay.
          */
         case -EPROTO:
         case -ETIME:
@@ -1185,8 +1186,9 @@ static void tx_complete (struct urb *urb)
                 case -ESHUTDOWN:                // hardware gone
                         break;
 
-                // like rx, tx gets controller i/o faults during khubd delays
-                // and so it uses the same throttling mechanism.
+                /* like rx, tx gets controller i/o faults during hub_wq
+                 * delays and so it uses the same throttling mechanism.
+                 */
                 case -EPROTO:
                 case -ETIME:
                 case -EILSEQ: