V4L/DVB (9361): Dynamic DVB minor allocation

Implement dynamic minor allocation for DVB, to allow more than four
devices of the same type per adapter, based on drivers/usb/core/file.c.

Add a new config option, DVB_DYNAMIC_MINORS, to make use of this
feature, which defaults to no for backwards compatibility.

Signed-off-by: Andreas Oberritter <obi@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 13 insertions, 0 deletions

diff --git a/drivers/media/dvb/Kconfig b/drivers/media/dvb/Kconfig
index 0bcd852576d6..40ebde53b3ce 100644
--- a/drivers/media/dvb/Kconfig
+++ b/drivers/media/dvb/Kconfig
@@ -2,6 +2,19 @@
 # DVB device configuration
 #
 
+config DVB_DYNAMIC_MINORS
+        bool "Dynamic DVB minor allocation"
+        depends on DVB_CORE
+        default n
+        help
+          If you say Y here, the DVB subsystem will use dynamic minor
+          allocation for any device that uses the DVB major number.
+          This means that you can have more than 4 of a single type
+          of device (like demuxes and frontends) per adapter, but udev
+          will be required to manage the device nodes.
+
+          If you are unsure about this, say N here.
+
 menuconfig DVB_CAPTURE_DRIVERS
         bool "DVB/ATSC adapters"
         depends on DVB_CORE