Staging: USB/IP: add common functions needed

This adds the common functions needed by both the host and client side
of the USB/IP code.

Brian Merrell cleaned up a lot of this code and submitted it for
inclusion.  Greg also did a lot of cleanup.

Signed-off-by: Brian G. Merrell <bgmerrell@novell.com>
Cc: Takahiro Hirofuchi <hirofuchi@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/Kconfig

@@ -33,4 +33,6 @@ source "drivers/staging/me4000/Kconfig"
 
 source "drivers/staging/go7007/Kconfig"
 
+source "drivers/staging/usbip/Kconfig"
+
 endif # STAGING

drivers/staging/Makefile

@@ -5,3 +5,4 @@ obj-$(CONFIG_SLICOSS)		+= slicoss/
 obj-$(CONFIG_SXG)		+= sxg/
 obj-$(CONFIG_ME4000)		+= me4000/
 obj-$(CONFIG_VIDEO_GO7007)	+= go7007/
+obj-$(CONFIG_USB_IP_COMMON)	+= usbip/

drivers/staging/usbip/Kconfig

@@ -0,0 +1,14 @@
+config USB_IP_COMMON
+	tristate "USB IP support (EXPERIMENTAL)"
+	depends on USB && EXPERIMENTAL
+	default N
+	---help---
+	  This enables pushing USB packets over IP to allow remote
+	  machines access to USB devices directly.  For more details,
+	  and links to the userspace utility programs to let this work
+	  properly, see http://usbip.naist.jp/
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called usbip_common_mod.
+
+	  If unsure, say N.

drivers/staging/usbip/Makefile

@@ -0,0 +1,6 @@
+obj-$(CONFIG_USB_IP_COMMON) += usbip_common_mod.o
+usbip_common_mod-objs := usbip_common.o usbip_event.o
+
+ifeq ($(CONFIG_USB_DEBUG),y)
+	EXTRA_CFLAGS += -DDEBUG
+endif

drivers/staging/usbip/README

@@ -0,0 +1,6 @@
+TODO:
+	- more discussion about the protocol
+	- testing
+	- review of the userspace interface
+
+Please send patches for this code to Greg Kroah-Hartman <greg@kroah.com>