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Subject[PATCH] samples: fix the compile error about SAMPLE VFIO MDEV series
From: ye xingchen <ye.xingchen@zte.com.cn>

When CONFIG_VFIO = m, SAMPLE_VFIO_MDEV_MTTY, SAMPLE_VFIO_MDEV_MTTY and
SAMPLE_VFIO_MDEV_MBOCHS can be selected as:
CONFIG_SAMPLE_VFIO_MDEV_MTTY = y;
CONFIG_SAMPLE_VFIO_MDEV_MTTY = y;
CONFIG_SAMPLE_VFIO_MDEV_MBOCHS = y;

That will cause compile error such as:

ld: samples/vfio-mdev/mdpy.o: in function 'mdpy_remove':
samples/vfio-mdev/mdpy.c:294: undefined reference to
'vfio_unregister_group_dev'

ld: samples/vfio-mdev/mtty.o: in function 'mtty_remove':
samples/vfio-mdev/mtty.c:793: undefined reference to
'vfio_unregister_group_dev'

ld: samples/vfio-mdev/mbochs.o: in function 'mbochs_remove':
samples/vfio-mdev/mbochs.c:603: undefined reference to
'vfio_unregister_group_dev'

Add dependency make SAMPLE_VFIO_MDEV_MTTY, SAMPLE_VFIO_MDEV_MTTY and
SAMPLE_VFIO_MDEV_MBOCHS not allowed to set as y when
CONFIG_VFIO = m.

Signed-off-by: ye xingchen <ye.xingchen@zte.com.cn>
---
samples/Kconfig | 3 +++
1 file changed, 3 insertions(+)

diff --git a/samples/Kconfig b/samples/Kconfig
index 56b191d128d8..44a09dfa8a0b 100644
--- a/samples/Kconfig
+++ b/samples/Kconfig
@@ -185,6 +185,7 @@ config SAMPLE_UHID

config SAMPLE_VFIO_MDEV_MTTY
tristate "Build VFIO mtty example mediated device sample code"
+ depends on VFIO
select VFIO_MDEV
help
Build a virtual tty sample driver for use as a VFIO
@@ -192,6 +193,7 @@ config SAMPLE_VFIO_MDEV_MTTY

config SAMPLE_VFIO_MDEV_MDPY
tristate "Build VFIO mdpy example mediated device sample code"
+ depends on VFIO
select VFIO_MDEV
help
Build a virtual display sample driver for use as a VFIO
@@ -209,6 +211,7 @@ config SAMPLE_VFIO_MDEV_MDPY_FB

config SAMPLE_VFIO_MDEV_MBOCHS
tristate "Build VFIO mdpy example mediated device sample code"
+ depends on VFIO
select VFIO_MDEV
select DMA_SHARED_BUFFER
help
--
2.25.1
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