NET: pc300, move to staging as it is broken

It was marked as BROKEN back in 2008. It is because the tty handling
in the driver is really broken.

There was some activity in January 2012 to fix the driver, but the
patch was commented to be bogus:
  https://lkml.org/lkml/2012/1/29/160
and we have not heard back from the author since then:
  https://lkml.org/lkml/2012/3/28/412

So since nobody stepped in and rewrote the driver, it is time to move
it out of line now. And drop it some time later if nobody comes up
with patches to fix the driver in staging.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Acked-by: David S. Miller <davem@davemloft.net>
Cc: Alan Cox <alan@linux.intel.com>
Cc: Andrea Shepard <andrea@persephoneslair.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/net/wan/Kconfig

@@ -203,37 +203,6 @@ config WANXL_BUILD_FIRMWARE
 
 	  You should never need this option, say N.
 
-config PC300
-	tristate "Cyclades-PC300 support (RS-232/V.35, X.21, T1/E1 boards)"
-	depends on HDLC && PCI && BROKEN
-	---help---
-	  This driver is broken because of struct tty_driver change.
-
-	  Driver for the Cyclades-PC300 synchronous communication boards.
-
-	  These boards provide synchronous serial interfaces to your
-	  Linux box (interfaces currently available are RS-232/V.35, X.21 and
-	  T1/E1). If you wish to support Multilink PPP, please select the
-	  option later and read the file README.mlppp provided by PC300
-	  package.
-
-	  To compile this as a module, choose M here: the module
-	  will be called pc300.
-
-	  If unsure, say N.
-
-config PC300_MLPPP
-	bool "Cyclades-PC300 MLPPP support"
-	depends on PC300 && PPP_MULTILINK && PPP_SYNC_TTY && HDLC_PPP
-	help
-	  Multilink PPP over the PC300 synchronous communication boards.
-
-comment "Cyclades-PC300 MLPPP support is disabled."
-	depends on HDLC && PC300 && (PPP=n || !PPP_MULTILINK || PPP_SYNC_TTY=n || !HDLC_PPP)
-
-comment "Refer to the file README.mlppp, provided by PC300 package."
-	depends on HDLC && PC300 && (PPP=n || !PPP_MULTILINK || PPP_SYNC_TTY=n || !HDLC_PPP)
-
 config PC300TOO
 	tristate "Cyclades PC300 RSV/X21 alternative support"
 	depends on HDLC && PCI

drivers/net/wan/Makefile

@@ -17,10 +17,6 @@ obj-$(CONFIG_HDLC_FR)		+= hdlc_fr.o
 obj-$(CONFIG_HDLC_PPP)		+= hdlc_ppp.o
 obj-$(CONFIG_HDLC_X25)		+= hdlc_x25.o
 
-pc300-y				:= pc300_drv.o
-pc300-$(CONFIG_PC300_MLPPP)	+= pc300_tty.o
-pc300-objs			:= $(pc300-y)
-
 obj-$(CONFIG_HOSTESS_SV11)	+= z85230.o	hostess_sv11.o
 obj-$(CONFIG_SEALEVEL_4021)	+= z85230.o	sealevel.o
 obj-$(CONFIG_COSA)		+= cosa.o
@@ -35,7 +31,6 @@ obj-$(CONFIG_SDLA)		+= sdla.o
 obj-$(CONFIG_CYCLADES_SYNC)	+= cycx_drv.o cyclomx.o
 obj-$(CONFIG_LAPBETHER)		+= lapbether.o
 obj-$(CONFIG_SBNI)		+= sbni.o
-obj-$(CONFIG_PC300)		+= pc300.o
 obj-$(CONFIG_N2)		+= n2.o
 obj-$(CONFIG_C101)		+= c101.o
 obj-$(CONFIG_WANXL)		+= wanxl.o

drivers/staging/Kconfig

@@ -120,6 +120,8 @@ source "drivers/staging/nvec/Kconfig"
 
 source "drivers/staging/media/Kconfig"
 
+source "drivers/staging/net/Kconfig"
+
 source "drivers/staging/omapdrm/Kconfig"
 
 source "drivers/staging/android/Kconfig"

drivers/staging/Makefile

@@ -4,6 +4,7 @@
 obj-$(CONFIG_STAGING)		+= staging.o
 
 obj-y				+= media/
+obj-y				+= net/
 obj-$(CONFIG_ET131X)		+= et131x/
 obj-$(CONFIG_SLICOSS)		+= slicoss/
 obj-$(CONFIG_USBIP_CORE)	+= usbip/

drivers/staging/net/Kconfig

@@ -0,0 +1,38 @@
+if NETDEVICES
+
+if WAN
+
+config PC300
+	tristate "Cyclades-PC300 support (RS-232/V.35, X.21, T1/E1 boards)"
+	depends on HDLC && PCI && BROKEN
+	---help---
+	  This driver is broken because of struct tty_driver change.
+
+	  Driver for the Cyclades-PC300 synchronous communication boards.
+
+	  These boards provide synchronous serial interfaces to your
+	  Linux box (interfaces currently available are RS-232/V.35, X.21 and
+	  T1/E1). If you wish to support Multilink PPP, please select the
+	  option later and read the file README.mlppp provided by PC300
+	  package.
+
+	  To compile this as a module, choose M here: the module
+	  will be called pc300.
+
+	  If unsure, say N.
+
+config PC300_MLPPP
+	bool "Cyclades-PC300 MLPPP support"
+	depends on PC300 && PPP_MULTILINK && PPP_SYNC_TTY && HDLC_PPP
+	help
+	  Multilink PPP over the PC300 synchronous communication boards.
+
+comment "Cyclades-PC300 MLPPP support is disabled."
+	depends on HDLC && PC300 && (PPP=n || !PPP_MULTILINK || PPP_SYNC_TTY=n || !HDLC_PPP)
+
+comment "Refer to the file README.mlppp, provided by PC300 package."
+	depends on HDLC && PC300 && (PPP=n || !PPP_MULTILINK || PPP_SYNC_TTY=n || !HDLC_PPP)
+
+endif # WAN
+
+endif # NETDEVICES

drivers/staging/net/Makefile

@@ -0,0 +1,5 @@
+pc300-y				:= pc300_drv.o
+pc300-$(CONFIG_PC300_MLPPP)	+= pc300_tty.o
+pc300-objs			:= $(pc300-y)
+
+obj-$(CONFIG_PC300)		+= pc300.o

drivers/staging/net/TODO

@@ -0,0 +1,5 @@
+PC300
+The driver is very broken and cannot work with the current TTY layer. It is
+inevitable to convert it to the new TTY API.
+
+If no one steps in to adopt the driver, it will be removed in the 3.7 release.