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, 3 insertions, 3 deletions

diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
index 46987735a2e3..d664edabf14e 100644
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -632,7 +632,7 @@ retry:
 		return -EOVERFLOW;
 	}
 
-	/* use rhsc irqs after khubd is fully initialized */
+	/* use rhsc irqs after hub_wq is allocated */
 	set_bit(HCD_FLAG_POLL_RH, &hcd->flags);
 	hcd->uses_new_polling = 1;
 
@@ -909,8 +909,8 @@ static irqreturn_t ohci_irq (struct usb_hcd *hcd)
 		 * choices for RHSC.  Many followed the spec; RHSC triggers
 		 * on an edge, like setting and maybe clearing a port status
 		 * change bit.  With others it's level-triggered, active
-		 * until khubd clears all the port status change bits.  We'll
-		 * always disable it here and rely on polling until khubd
+		 * until hub_wq clears all the port status change bits.  We'll
+		 * always disable it here and rely on polling until hub_wq
 		 * re-enables it.
 		 */
 		ohci_writel(ohci, OHCI_INTR_RHSC, &regs->intrdisable);