[RFC: -next patch] don't allow FB_SIS=m, DRM_SIS=y

[Adrian Bunk <bunk@kernel.org>]

On Tue, Aug 12, 2008 at 10:37:00PM +0100, Dave Airlie wrote:
> 
> > > 
> > > Maybe the other way around, I don't want DRM_SIS influencing whether 
> > > FB_SIS is on or off, if the user wants sisfb on, then when they select it, 
> > > DRM_SIS should be built in the same way. But if sisfb isn't selected by 
> > > the user, then selecting DRM_SIS shouldn't enable it.
> > 
> > If FB_SIS=m, should DRM_SIS=y be allowed or should in this case DRM_SIS 
> > be restricted to n/m?
> 
> Probably not. if FB_SIS is selected at all, DRM_SIS should match it, if 
> FB_SIS isn't selected, DRM_SIS should not select it.

I assume FB_SIS=y, DRM_SIS=m should still be possible?

If this assumption is correct the fix is below.

> Dave.

cu
Adrian


<--  snip  -->


FB_SIS=m, DRM_SIS=y is not a legal configuration.

Reported-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Adrian Bunk <bunk@kernel.org>

---
c303119b9561e13be97f3d4b0d7eaa6930fc21d8 
diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
index 610d6fd..bf9003e 100644
--- a/drivers/gpu/drm/Kconfig
+++ b/drivers/gpu/drm/Kconfig
@@ -87,6 +87,7 @@ config DRM_MGA
 config DRM_SIS
 	tristate "SiS video cards"
 	depends on DRM && AGP
+	depends on FB_SIS || FB_SIS=n
 	help
 	  Choose this option if you have a SiS 630 or compatible video
           chipset. If M is selected the module will be called sis. AGP