[PATCH] staging/comedi: Add VIRT_TO_BUS dependency to 'fix' build failure

[Peter Huewe <peterhuewe@gmx.de>]

If the platform does not provide virt_to_bus the ni_labpc.c driver fails to
compile.
In order not to break these builds we have to add a depends on
CONFIG_VIRT_TO_BUS to the affected drivers.

Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
---
 drivers/staging/comedi/Kconfig | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/staging/comedi/Kconfig b/drivers/staging/comedi/Kconfig
index 7871579..76ccb90 100644
--- a/drivers/staging/comedi/Kconfig
+++ b/drivers/staging/comedi/Kconfig
@@ -1024,6 +1024,7 @@ config COMEDI_NI_LABPC_PCI
 	tristate "NI Lab-PC PCI-1200 support"
 	select COMEDI_NI_LABPC
 	select COMEDI_MITE
+	depends on VIRT_TO_BUS
 	---help---
 	  Enable support for National Instruments Lab-PC PCI-1200.
 
@@ -1151,6 +1152,7 @@ config COMEDI_NI_DAQ_DIO24_CS
 config COMEDI_NI_LABPC_CS
 	tristate "NI DAQCard-1200 PCMCIA support"
 	select COMEDI_NI_LABPC
+	depends on VIRT_TO_BUS
 	---help---
 	  Enable support for the National Instruments PCMCIA DAQCard-1200
 
@@ -1267,6 +1269,7 @@ config COMEDI_NI_LABPC
 	tristate
 	select COMEDI_8255
 	select COMEDI_FC
+	depends on VIRT_TO_BUS
 
 config COMEDI_NI_TIO
 	tristate
-- 
1.8.1.5